Singapore Water Bill Calculator 2026 — Estimate Your Monthly PUB Water Bill With the Correct Tiered Water Tariff, Water Conservation Tax, and Waterborne Fee, See the Full Three-Component Breakdown With 9% GST Applied on the Total, Net Off Your U-Save Rebate, and Model How Much Water-Efficient WELS Fittings Could Save You

YOUR SINGAPORE WATER BILL IS BUILT FROM THREE COMPONENTS — THE WATER TARIFF, THE WATER CONSERVATION TAX, AND THE WATERBORNE FEE — ADDED TOGETHER PER CUBIC METRE, WITH 9% GST APPLIED ON THE FULL TOTAL. THE THREE COMPONENTS: (1) WATER TARIFF: The charge for producing and supplying clean potable water — S$1.43 per cubic metre for the first 40 m³ a month (Tier 1). (2) WATER CONSERVATION TAX (WCT): A tax on top of the tariff to reflect water scarcity, charged from the very first drop — 50% of the tariff in Tier 1, which is about S$0.72/m³. (3) WATERBORNE FEE (WBF): Covers collecting and treating used water through the sewerage network — S$1.09/m³ in Tier 1. THE ALL-IN RATE: Add the three: S$1.43 + S$0.72 + S$1.09 = about S$3.24 per m³ before GST for Tier 1 usage. Then 9% GST is applied to that total, taking it to about S$3.53 per m³ all-in. THE CALCULATION: Multiply your monthly usage (in m³) by these rates. A household using 16 m³ a month pays 16 x S$3.24 = about S$51.76 before GST, plus 9% GST (about S$4.66), for a total of about S$56.42/month. THE TWO TIERS: If you use more than 40 m³ in a month, the portion above 40 is charged at higher Tier 2 rates (tariff S$1.81/m³, WCT 65%). But over 96% of households stay within Tier 1. THE BILLING: SP Services is PUB billing agent, so your water appears on the same consolidated monthly utilities bill as your electricity and gas. THE PRACTICAL POINT: This calculator applies the correct 2026 tiered rates, shows each of the three components separately, applies GST properly on the full total, and nets any U-Save rebate — giving you an accurate bill that most other calculators (which use outdated or wrong rates) do not.

AS OF 2026, THE PUB WATER RATES (EFFECTIVE 1 APRIL 2025 AND UNCHANGED SINCE) TOTAL ABOUT S$3.24 PER CUBIC METRE BEFORE GST FOR TIER 1 HOUSEHOLDS, OR ABOUT S$3.53 WITH 9% GST. THE FULL 2026 RATE TABLE (per m³, before GST): TIER 1 (up to 40 m³/month): Water Tariff S$1.43, Water Conservation Tax 50% of tariff (about S$0.72), Waterborne Fee S$1.09 — total about S$3.24. TIER 2 (above 40 m³/month): Water Tariff S$1.81, Water Conservation Tax 65% of tariff (about S$1.18), Waterborne Fee S$1.09+ — total about S$4.08+. Then 9% GST is added on top of these totals. THE HISTORY: Water prices rose in two steps — S$0.20/m³ on 1 April 2024 and another S$0.30/m³ on 1 April 2025 — a total increase of S$0.50/m³ (roughly 2.5% a year since the last revision in 2017). Before these increases, a cubic metre cost about S$2.74 all-in; it now costs about S$3.24 before GST for Tier 1. WHY IT ROSE: PUB cited rising costs — electricity for desalination and NEWater plants up about 37%, construction costs up about 35%, treatment chemicals up about 33%, and maintenance up about 18%. Water pricing recovers the full cost of a resource Singapore cannot take for granted. NO FURTHER INCREASE ANNOUNCED: As of June 2026, no additional increase has been announced; the rate stays at about S$3.24/m³ for Tier 1. PUB reviews prices periodically and announces changes in advance. THE PRACTICAL POINT: This calculator uses these exact current 2026 rates, so your estimate reflects what you actually pay now — unlike older calculators still using pre-2024 rates of around S$2.74/m³.

THE WATER CONSERVATION TAX (WCT) IS A TAX CHARGED ON TOP OF YOUR WATER TARIFF — 50% OF THE TARIFF IN TIER 1 AND 65% IN TIER 2 — INTRODUCED IN 1991 TO REFLECT WATER SCARCITY AND ENCOURAGE CONSERVATION FROM THE VERY FIRST DROP. WHAT IT IS: The WCT is imposed as a percentage of the water tariff, not a flat fee. In Tier 1 (up to 40 m³), it is 50% of the S$1.43 tariff, or about S$0.72/m³. In Tier 2 (above 40 m³), it rises to 65% of the higher S$1.81 tariff, or about S$1.18/m³. WHY IT EXISTS: Singapore has no natural water resources of its own and relies on a mix of imported water, local catchment, desalination, and NEWater. The WCT signals that water is precious and expensive to produce — what you are really paying for is the cost of producing the NEXT drop of potable water, which increasingly comes from costly desalination and NEWater rather than cheap imported or catchment water. WHY IT IS CHARGED FROM THE FIRST DROP: Unlike a tiered surcharge that only kicks in above a threshold, the WCT applies to all your usage from the very first cubic metre. This reinforces the message that every drop has value, encouraging conservation across the board, not just among heavy users. THE ESCALATION FOR HEAVY USERS: The jump from 50% to 65% above 40 m³ makes heavy users feel the price more sharply, which is the conservation mechanism — the more you use, the higher the tax rate on your excess. THE GST INTERACTION: GST is applied on top of the WCT, because MOF treats the WCT as part of the price payable for water (the same way GST applies to tobacco, liquor, and petrol duties). So you pay 9% GST on a figure that already includes the WCT. THE PRACTICAL POINT: This calculator shows the WCT as a separate line so you can see exactly how much of your bill is this conservation tax — typically about 22% of the before-GST total for Tier 1 households.

THE WATERBORNE FEE (WBF, SOMETIMES CALLED THE WATERBORNE TAX) IS A CHARGE OF S$1.09 PER CUBIC METRE IN TIER 1 THAT PAYS FOR COLLECTING AND TREATING YOUR USED WATER THROUGH SINGAPORE SEWERAGE NETWORK. WHAT IT COVERS: Every drop of water you use eventually becomes used water (sewage), which is collected via a separate network of sewers and channelled to water reclamation plants for treatment. There it is either purified into NEWater or discharged safely into the sea. The WBF funds this used-water collection and treatment, plus the maintenance of the extensive underground sewerage network. WHY IT IS SEPARATE FROM THE TARIFF: The water tariff covers producing and delivering CLEAN water TO your home; the waterborne fee covers taking USED water AWAY and treating it. They are two halves of the water cycle — supply and disposal — so they are charged separately. HOW IT IS CHARGED: Like the other components, the WBF is volume-based — S$1.09 per cubic metre of water used in Tier 1 (the assumption being that water used roughly equals used water generated). Heavy users above 40 m³ pay a higher waterborne rate on the excess. THE HISTORY: The WBF was previously a fixed Sanitary Appliance Fee (S$2.80 per toilet bowl) plus a waterborne fee, but these were merged into a single volume-based fee, and a tiered structure was introduced to encourage conservation among heavy users. ITS SHARE OF YOUR BILL: At S$1.09/m³, the WBF is about a third of your before-GST cost per cubic metre — a substantial chunk, reflecting how expensive used-water treatment is in a land-scarce country investing heavily in water recycling. THE PRACTICAL POINT: This calculator shows the waterborne fee as a distinct line so you understand that a third of your water bill is actually for treating what goes down the drain, not just the clean water coming out of the tap. Using less water cuts both the supply cost and this disposal cost together.

AN AVERAGE SINGAPORE HOUSEHOLD USES ROUGHLY 15 TO 20 CUBIC METRES OF WATER PER MONTH, WITH PER-PERSON CONSUMPTION AVERAGING AROUND 140 LITRES A DAY — COMFORTABLY WITHIN THE CHEAPER TIER 1 (UNDER 40 M³). THE TYPICAL FIGURES: (1) A single person uses roughly 4 to 5 m³/month. (2) A couple uses about 8 to 10 m³/month. (3) A family of four uses about 15 to 18 m³/month. (4) A larger household of five or six uses about 20 to 25 m³/month. These are typical; actual usage varies with habits. THE PER-PERSON BENCHMARK: Singapore average domestic water consumption is around 140 litres per person per day. Over a 30-day month, that is about 4.2 m³ per person. Multiply by household size for a rough estimate — which is exactly what this calculator people mode does. WHAT DRIVES USAGE: (1) SHOWERS AND BATHS: Often the largest single use — a long shower with an unrated showerhead (12+ litres/min) uses far more than a short one with a 3-tick WELS head (about 6 litres/min). (2) TOILET FLUSHING: A significant recurring use; dual-flush cisterns help. (3) LAUNDRY: Washing machines, especially older top-loaders, use substantial water. (4) DISHWASHING, COOKING, CLEANING: Steady daily uses. (5) GARDENS, POOLS, CAR WASHING: Push some landed homes into higher usage. THE TIER-2 THRESHOLD: Very few households — only about 4% — exceed 40 m³/month. Those that do are usually large families, homes with frequent guests, or landed properties with gardens and pools. THE CONSERVATION ANGLE: Because 96% of households are in Tier 1, the main way to cut your bill is simply using less — every cubic metre saved cuts all three components plus GST. THE PRACTICAL POINT: If you do not know your exact m³, this calculator lets you estimate from household size (people mode) or litres per day, then shows your bill. For your precise figure, check your SP utilities bill or the SP app, which shows your monthly water consumption in cubic metres.

YES — GST OF 9% (THE 2026 RATE) IS APPLIED TO YOUR FULL WATER BILL, INCLUDING THE WATER CONSERVATION TAX AND WATERBORNE FEE, SO YOU EFFECTIVELY PAY TAX ON A FIGURE THAT ALREADY CONTAINS A TAX. HOW GST IS APPLIED: Your three water components — tariff, water conservation tax, and waterborne fee — are added together to get the before-GST total (about S$3.24/m³ for Tier 1). Then 9% GST is applied to that entire total. So for a household using 16 m³, the before-GST bill of about S$51.76 attracts about S$4.66 in GST, for a total of about S$56.42. THE TAX-ON-A-TAX QUESTION: Many people are surprised that GST applies to the Water Conservation Tax — effectively a tax on a tax. The Ministry of Finance has explained this is by design: the WCT is treated as part of the PRICE PAYABLE for water, not as a separate government levy sitting outside the price. This is the same principle by which GST applies to the duties on tobacco, liquor, and petrol — the duty is part of the price, and GST applies to the price. WHY IT MATTERS FOR YOUR ESTIMATE: Because GST applies to the full total, using the before-GST rate understates your actual bill by 9%. Always use the GST-inclusive figure for budgeting. This calculator applies 9% GST to the full component total, so your estimate reflects the real amount you pay. THE 2026 GST RATE: Singapore GST rose to 9% from 1 January 2024 and remains 9% in 2026, so that is the rate applied here. THE BUSINESS NOTE: GST-registered businesses can generally claim the GST on their water as input tax, but households cannot — so for a household, the GST-inclusive figure is the true cost. THE PRACTICAL POINT: This calculator shows the GST amount as a separate line so you can see exactly how much of your water bill is GST — and confirms that the headline all-in rate of about S$3.53/m³ for Tier 1 already includes it.

TIER 1 APPLIES TO THE FIRST 40 CUBIC METRES YOU USE EACH MONTH AT LOWER RATES, WHILE TIER 2 APPLIES TO ANY USAGE ABOVE 40 M³ AT NOTICEABLY HIGHER RATES — A STRUCTURE DESIGNED TO MAKE HEAVY USERS PAY MORE. THE TWO TIERS (per m³, before GST): TIER 1 (up to 40 m³): Water Tariff S$1.43, Water Conservation Tax 50% (about S$0.72), Waterborne Fee S$1.09 — total about S$3.24/m³. TIER 2 (above 40 m³): Water Tariff S$1.81, Water Conservation Tax 65% (about S$1.18), Waterborne Fee S$1.09+ — total about S$4.08+/m³, roughly 26% more per cubic metre. HOW THE MARGINAL PRICING WORKS: The tiers are marginal, like income tax brackets. If you use 45 m³, the first 40 m³ are charged at Tier 1 rates and only the 5 m³ above 40 are charged at Tier 2 rates — not your entire usage. So crossing 40 m³ does not suddenly reprice everything, only the excess. WHO IS IN EACH TIER: Over 96% of households stay entirely within Tier 1 — only about 4% use more than 40 m³ in a month. Tier 2 users are typically large families, households with frequent guests, or landed homes with gardens, pools, or extensive outdoor water use. WHY THE HIGHER TIER EXISTS: Both the water tariff and the water conservation tax jump in Tier 2 specifically to make heavy users feel the price more sharply, reinforcing conservation. The 65% WCT (versus 50%) is the clearest signal — heavy usage is taxed harder. THE PRACTICAL CONSEQUENCE: If you are near or above 40 m³, reducing usage back below the threshold moves your excess consumption from the expensive Tier 2 back to the cheaper Tier 1 — a double saving, since you both use less and avoid the higher marginal rate. THE PRACTICAL POINT: This calculator automatically applies the correct marginal split at 40 m³, charging Tier 1 rates on your first 40 m³ and Tier 2 rates only on any excess, and flags clearly if you are in Tier 2 so you know you are paying the premium rate.

THE GST VOUCHER U-SAVE REBATE, CREDITED QUARTERLY TO YOUR SP SERVICES ACCOUNT, OFFSETS YOUR WATER BILL ALONG WITH YOUR ELECTRICITY AND GAS — BECAUSE ALL THREE APPEAR ON THE SAME CONSOLIDATED UTILITIES BILL. HOW IT WORKS: U-Save is credited to your household SP Services utilities account, which covers water, electricity, and gas together. The rebate reduces the total you pay across all utilities, so part of it effectively offsets your water charges. For FY2026, eligible HDB households receive between S$330 and S$570 in U-Save across the year, depending on flat type. THE WATER-SPECIFIC PERSPECTIVE: Because water is typically a smaller part of the utility bill than electricity, U-Save often more than covers the water portion for smaller households. For example, a 1-2 room household receiving S$570/year in U-Save easily offsets its modest water bill (perhaps S$300-400/year) with room to spare for electricity and gas. THE CONTEXT OF PRICE INCREASES: When water prices rose in 2024 and 2025, the Government explicitly noted that U-Save rebates would more than cover the increase for most HDB households. The roughly S$105/year increase for a typical household from the S$0.50/m³ rise is comfortably absorbed by the annual U-Save for eligible flats. WHO GETS IT: U-Save is for Singaporean HDB households with at least one Singapore citizen owner or occupier and no member owning more than one property. Private property residents (condos and landed homes) get no U-Save, so they bear the full water bill — and since landed homes often use more water (gardens, pools), they feel water price rises most. HOW THIS CALCULATOR HANDLES IT: This calculator lets you enter your quarterly U-Save and nets a monthly portion against your water bill to show your net cost. Note that in reality U-Save offsets your whole utility bill, so treat this as an illustration of how much of your water the rebate could cover. THE PRACTICAL POINT: Enter your U-Save (or use our U-Save Rebate Calculator to find your exact amount by flat type) to see how much of your water bill it cushions. For most HDB households, the rebate substantially or fully offsets water costs.

THE MOST EFFECTIVE WAY TO CUT YOUR SINGAPORE WATER BILL IS TO REDUCE CONSUMPTION WITH WATER-EFFICIENT (WELS-RATED) FITTINGS AND MINDFUL HABITS — BECAUSE EVERY CUBIC METRE SAVED CUTS ALL THREE BILL COMPONENTS PLUS GST TOGETHER. THE HIGH-IMPACT FITTINGS: (1) WELS-RATED SHOWERHEAD: A 3-tick showerhead uses about 6 litres/minute versus 12+ for an unrated one — potentially halving shower water. Showers are often the biggest single use. (2) DUAL-FLUSH OR LOW-FLUSH TOILET: Cuts flushing water substantially; use the half-flush where possible. (3) WELS TAPS AND FLOW REGULATORS: Aerators and efficient taps reduce basin and kitchen water. (4) EFFICIENT WASHING MACHINE: A high-tick front-loader uses far less water than an old top-loader. THE HABIT CHANGES: (1) SHORTER SHOWERS: Cutting a shower from 8 to 5 minutes saves meaningful water daily. (2) TURN OFF THE TAP while brushing teeth, soaping, or scrubbing dishes. (3) FULL LOADS ONLY for laundry and dishwashing. (4) FIX LEAKS PROMPTLY — a dripping tap or running toilet can waste substantial water unnoticed. (5) COLLECT AND REUSE water where practical (e.g. rinse water for plants). THE TIER-2 ANGLE: If you are above 40 m³, cutting back below the threshold saves doubly — less usage AND avoiding the higher Tier 2 marginal rate. THE WHY-IT-COMPOUNDS POINT: Because your bill stacks tariff + WCT + WBF + GST, every litre saved cuts the clean-water cost, the conservation tax, the used-water treatment cost, and the GST on all of it simultaneously. So water savings compound across four charges at once. THE MEASUREMENT HABIT: Track your monthly m³ via the SP app to spot creeping usage and catch leaks early. THE PRACTICAL POINT: This calculator includes a WELS-fittings mode — enter an estimated percentage reduction (a 3-tick showerhead alone can cut 10-15% of household water) and it shows your new lower bill and annual saving, so you can see the payback from investing in efficient fittings.

YOUR WATER BILL ROSE BECAUSE PUB INCREASED WATER PRICES BY A TOTAL OF S$0.50 PER CUBIC METRE ACROSS TWO STEPS — S$0.20 ON 1 APRIL 2024 AND S$0.30 ON 1 APRIL 2025 — THE FIRST INCREASE SINCE 2017. THE TWO-STEP INCREASE: The rise was implemented in two phases to soften the impact. Before it, a cubic metre of water cost about S$2.74 all-in. After the first step it was about S$2.94, and after the second step it reached about S$3.24/m³ before GST for Tier 1 — where it remains in 2026. THE SIZE OF THE IMPACT: For a household using 16 m³/month, the S$0.50/m³ increase adds about S$8/month before GST, or roughly S$105 a year. Smaller households pay less; larger ones more. Spread over the years since the last 2017 revision, it works out to about 2.5% a year. WHY PUB RAISED PRICES: The cost of producing and supplying water had risen substantially since 2017 due to external pressures. PUB cited specific increases: electricity to run desalination and NEWater plants up about 37%, construction costs for water projects up about 35%, treatment chemicals up about 33%, and maintenance up about 18%. The total cost of producing water had come to exceed the old price, so the increase was to catch up. THE STRUCTURAL REASON: Singapore increasingly relies on energy-intensive NEWater and desalination as water demand grows, and these cost more than imported or catchment water. Right-pricing water funds continued investment in a secure, resilient supply. THE GOVERNMENT SUPPORT: Alongside the increase, the Government enhanced U-Save rebates, noting these would more than cover the increase for most HDB households — so the net impact on eligible flats was cushioned. NO FURTHER RISE ANNOUNCED: As of June 2026, no additional increase has been announced; PUB reviews prices periodically and gives advance notice of any change. THE PRACTICAL POINT: This calculator uses the current post-increase 2026 rates, so it reflects what you pay now. If your bill jumped, this is why — and the U-Save netting feature shows how much of the increase your rebate offsets.

YES — STAYING UNDER 40 CUBIC METRES A MONTH KEEPS ALL YOUR USAGE IN THE CHEAPER TIER 1, WHERE THE TARIFF AND WATER CONSERVATION TAX ARE BOTH LOWER THAN IN TIER 2. THE TIER 1 ADVANTAGE: Below 40 m³, you pay the water tariff at S$1.43/m³ and the water conservation tax at 50% of tariff (about S$0.72/m³), for an all-in rate of about S$3.24/m³ before GST. This is where over 96% of households sit. THE TIER 2 PENALTY: Above 40 m³, the portion of usage over 40 is charged at S$1.81/m³ tariff (up 27%) and 65% WCT (about S$1.18/m³), pushing the marginal rate to about S$4.08+/m³ before GST — roughly 26% more per cubic metre. THE MARGINAL NATURE: Importantly, only the usage ABOVE 40 m³ is charged at Tier 2. Your first 40 m³ always stays at the cheaper Tier 1 rate. So if you use 45 m³, only 5 m³ is at the premium rate. This means crossing 40 m³ is not a cliff — but it does make your marginal water more expensive. WHO NEEDS TO WATCH THIS: Since 96% of households never exceed 40 m³, most people never touch Tier 2. Those who do — large families, homes with pools or gardens, households with many occupants — should watch their usage, because trimming back below 40 m³ removes the Tier 2 premium entirely on the excess. THE CONSERVATION INTENT: This tiered design is deliberate — it makes heavy users feel the cost of water more, encouraging them to conserve, while keeping the essential usage of typical households at the lower rate. THE PRACTICAL POINT: This calculator shows which tier you are in and applies the correct marginal rates. If you are close to or above 40 m³, it flags Tier 2 so you can see the premium you are paying — and you can model the saving from cutting back below the threshold by lowering your usage input.

YES — ALL RESIDENTIAL PROPERTIES PAY THE SAME PUB WATER RATES PER CUBIC METRE REGARDLESS OF PROPERTY TYPE, BUT CONDOS AND LANDED HOMES OFTEN HAVE HIGHER BILLS BECAUSE THEY USE MORE WATER AND GET NO U-SAVE REBATE. THE SAME RATES FOR ALL: The PUB water tariff, water conservation tax, and waterborne fee are uniform across all domestic households — an HDB flat, a condominium unit, and a landed home all pay S$1.43/m³ tariff (Tier 1), the same WCT percentages, and the same waterborne fee. There is no higher per-unit rate for private property; water is priced by consumption, not property value. THE CONSUMPTION DIFFERENCE: What differs is how much water each home uses. Landed homes in particular often use far more — gardens that need watering, swimming pools, car washing, more bathrooms, and often more occupants. This pushes some landed homes toward or above the 40 m³ Tier 2 threshold, where the marginal rate is higher. Condos vary, but units with private facilities may use more than a comparable HDB flat. THE U-SAVE DIFFERENCE: The crucial distinction is the rebate. U-Save is exclusively for HDB households — private property owners (condos and landed homes) receive NO U-Save. So while they pay the same rates, they bear the full water bill with no rebate cushion, whereas an HDB household net cost is reduced by U-Save. THE COMBINED EFFECT: A landed home therefore often has a much higher net water bill than an HDB flat — higher usage, possibly Tier 2 rates on the excess, and no U-Save. This is why water conservation matters most for private homes. THE MAINTENANCE-FEE NOTE: Condo residents also pay separate maintenance fees to their management corporation, which may cover common-area water (landscaping, pools) — but their in-unit water is billed by SP at the standard PUB rates. THE PRACTICAL POINT: This calculator applies the same PUB rates for any home, but lets private property residents set U-Save to zero (correctly, as they are not eligible), showing their full uncushioned bill. For landed homes near Tier 2, it flags the higher marginal rate.

THIS CALCULATOR GIVES A CLOSE AND ACCURATE ESTIMATE USING THE CORRECT 2026 PUB RATES AND PROPER TIERED MATH, BUT YOUR ACTUAL SP SERVICES BILL IS THE DEFINITIVE FIGURE. WHAT MAKES IT ACCURATE: (1) CORRECT 2026 RATES: It uses the current PUB rates effective 1 April 2025 (Tier 1 tariff S$1.43, WCT 50%, WBF S$1.09) — unlike many calculators still using outdated pre-2024 rates or incorrect figures (some wrongly state WCT as 30%). (2) PROPER TIERED MATH: It applies the marginal split correctly at 40 m³, charging Tier 1 on your first 40 m³ and Tier 2 only on the excess. (3) CORRECT GST: It applies 9% GST to the full component total, including the WCT, as MOF prescribes. (4) THREE COMPONENTS SHOWN: It breaks out the tariff, WCT, and WBF separately so you can verify each against your bill. WHERE ESTIMATES COME IN: (1) USAGE INPUT: If you enter your actual m³ from your SP bill, the calculation is essentially exact. If you estimate from litres/day or household size, the usage figure is a typical approximation, not your exact consumption. (2) PEOPLE MODE: The people-based estimate uses an average of about 140 litres/person/day — your household may use more or less. (3) WATERBORNE TIER-2 RATE: The Tier 2 waterborne fee is approximated; the vast majority of households are in Tier 1 where the rate is exact. WHAT IT DOES NOT INCLUDE: (1) Any miscellaneous account charges, arrears, or adjustments on your SP bill. (2) The electricity and gas portions of your consolidated utilities bill (this is water only). (3) The exact interaction of U-Save across all utilities (it nets U-Save against water for illustration; in reality U-Save offsets your whole utility bill). HOW TO GET THE MOST ACCURATE RESULT: Enter your actual monthly water usage in m³ from your latest SP bill or the SP app. THE PRACTICAL POINT: For budgeting, understanding your bill components, and modelling conservation savings, this calculator is highly reliable. For the exact amount owed, refer to your official SP Services utilities bill.

SP SERVICES (PART OF SP GROUP) IS PUB APPOINTED BILLING AGENT, WHICH IS WHY YOUR WATER, ELECTRICITY, AND GAS ALL APPEAR ON A SINGLE CONSOLIDATED MONTHLY UTILITIES BILL FROM SP RATHER THAN SEPARATE BILLS. THE ARRANGEMENT: PUB (the Public Utilities Board) is Singapore national water agency — it produces and supplies water and sets the water price. But rather than billing households directly, PUB uses SP Services as its billing agent. SP Services also handles electricity and gas billing, so it consolidates all three utilities into one monthly bill for efficiency. WHY IT IS CONSOLIDATED: Combining water, electricity, and gas into a single SP utilities bill is simpler for households — one bill, one payment, one account. It also means your U-Save rebate (credited to your SP account) offsets all three utilities together. WHAT SP DOES AND DOES NOT CONTROL: SP Services bills you for water at the rates PUB sets — SP does not set the water price. The water tariff, water conservation tax, and waterborne fee are all determined by PUB and the Government. SP simply calculates and collects. Similarly, the electricity regulated tariff is set by SP Group under EMA guidelines, but for water, PUB sets the price. THE OEM DISTINCTION: For electricity, you can switch to an Open Electricity Market retailer and be billed by them instead of SP for the electricity portion. But water has NO equivalent market — PUB is the sole water supplier, and SP Services bills it at PUB rates for everyone. There is no way to switch water providers or get a cheaper water rate. THE PRACTICAL IMPLICATION: Because water is a regulated monopoly with no retail competition, the only way to lower your water bill is to use less — there is no cheaper provider to switch to, unlike electricity. THE PRACTICAL POINT: This calculator reflects the PUB rates that SP Services bills you, so it matches the water portion of your consolidated SP utilities bill. For the electricity portion, see our Electricity Tariff Calculator; for switching electricity retailers, see our Open Electricity Market Comparison.

YES — IF YOU DO NOT KNOW YOUR EXACT CUBIC METRES, YOU CAN ESTIMATE YOUR WATER BILL FROM YOUR HOUSEHOLD SIZE OR FROM LITRES PER DAY, USING TYPICAL SINGAPORE CONSUMPTION FIGURES. THE THREE WAYS TO ESTIMATE: (1) DIRECT (m³): The most accurate — enter your monthly usage in cubic metres straight from your SP bill or the SP app. (2) LITRES PER DAY: If you have a sense of your daily consumption, enter litres/day and the calculator converts it to monthly m³ (litres/day x 30 / 1,000). (3) HOUSEHOLD SIZE (people mode): Enter the number of people and the calculator estimates usage at about 140 litres/person/day (the Singapore average), which you can adjust. THE PER-PERSON BENCHMARK: Singapore average domestic consumption is around 140 litres per person per day, or about 4.2 m³ per person per month. So a family of four uses roughly 16-17 m³/month — a good starting estimate if you do not have your bill. THE ACCURACY TRADE-OFF: The people and litres-per-day modes give a reasonable ballpark, but actual usage varies widely with habits — a household with long showers, frequent laundry, or a garden uses more than the average, while a frugal household uses less. For budgeting, the estimate is fine; for the exact figure, use your real m³. HOW TO FIND YOUR REAL USAGE: Your SP Services bill and the SP app both show your monthly water consumption in cubic metres. Checking a recent bill takes a moment and gives you the precise number to enter in m³ mode. WHY ESTIMATION IS USEFUL: If you are budgeting before moving into a new home, comparing scenarios, or do not have a bill handy, the people or litres-per-day modes let you get a realistic estimate without hunting for your exact usage. THE PRACTICAL POINT: This calculator offers all three input modes — pick m³ if you know it for precision, or people/litres-per-day if you need a quick estimate. All three feed the same accurate 2026 tiered rate calculation, so you get a proper bill breakdown either way.

THIS IS THE ONLY SINGAPORE WATER CALCULATOR THAT COMBINES THE CORRECT 2026 TIERED PUB RATES, A FULL THREE-COMPONENT BREAKDOWN, PROPER GST-ON-TOTAL MATH, U-SAVE NETTING, THREE INPUT MODES, AND WELS FITTING SAVINGS — WHILE OTHER RESOURCES OFFER OFFICIAL RATE PAGES WITH NO CALCULATOR OR GENERIC TOOLS WITH WRONG NUMBERS. HERE ARE THE SIX GAPS IT FILLS: (1) CORRECT, CURRENT 2026 RATES: Many existing tools use outdated pre-2024 rates (around S$2.74/m³) or state wrong figures (one popular utility page lists the Water Conservation Tax as 30% when it is actually 50% in Tier 1). This calculator uses the accurate current rates: tariff S$1.43, WCT 50%, WBF S$1.09, totalling about S$3.24/m³ before GST. (2) FULL THREE-COMPONENT BREAKDOWN: It shows the water tariff, water conservation tax, and waterborne fee as separate lines — so you understand what each part of your bill pays for, which official pages describe but never calculate for your usage. (3) PROPER TIERED MATH: It applies the marginal split correctly at 40 m³, charging Tier 1 on your first 40 m³ and Tier 2 only on the excess — and flags which tier you are in. (4) CORRECT GST TREATMENT: It applies 9% GST to the full total including the WCT, as MOF prescribes, and shows the GST amount transparently. (5) THREE INPUT MODES: Enter cubic metres directly, or estimate from litres per day or household size — flexibility no competitor offers, so you can get a bill even without your exact usage. (6) U-SAVE NETTING AND WELS SAVINGS: It nets your U-Save rebate to show your true net cost, and models the saving from water-efficient (WELS-rated) fittings — connecting the bill to actionable ways to reduce it. Combined with a visual component-breakdown chart, a branded PDF report, three realistic Singapore worked examples, and a WhatsApp share, this makes it the most accurate, complete, and genuinely useful Singapore water bill calculator available — answering the real questions: what is my true bill, what is it made of, which tier am I in, how much does U-Save help, and how much could efficient fittings save me?