CPF RSTU Calculator Singapore 2026
Tax Relief, Effective Return, Years to FRS/ERS & CPF LIFE Payout Boost
Calculate the full benefit of voluntary Retirement Sum Top-Up Scheme (RSTU) contributions — your income tax saving (up to S$8,000/yr for self, S$8,000/yr for a family member), the combined effective first-year return on your top-up, how many years to reach FRS or ERS at your chosen annual amount, and the additional CPF LIFE monthly payout generated by the top-up at age 65.
Used to project RA/SA growth to age 65 with and without RSTU, and show the CPF LIFE payout difference.
Under 55: enter your SA balance. Aged 55+: enter your RA balance. Check via Singpass → My CPF.
Cash top-up to your own RA (55+) or SA (under 55). Relief capped at S$8,000/yr regardless of actual top-up amount. Top-up above S$8K still earns 4% RA interest.
Top-up to spouse, parents, parents-in-law, grandparents, or siblings’ RA/SA. Qualifies for an additional S$8,000/yr tax relief for the top-upper. Sibling must have annual income not exceeding S$4,000.
From your IRAS Notice of Assessment. Used to calculate the exact income tax saving from RSTU tax relief at your marginal rate. Higher income = larger tax saving per dollar of top-up.
Required only if topping up a sibling’s account. Siblings must have annual income not exceeding S$4,000 to be eligible. Parents and spouse have no income cap.
Enter your RA/SA balance, annual top-up amounts, and income to see your income tax saving, effective first-year return, years to reach FRS or ERS, and the CPF LIFE monthly payout boost generated by consistent RSTU contributions.
RSTU Singapore 2026 — Retirement Sum Top-Up Scheme Tax Relief, Effective Return & How S$8,000/Year Beats Every Risk-Free Investment
The Retirement Sum Top-Up Scheme (RSTU) is arguably the single best risk-free financial move available to working Singaporeans. Every dollar of cash top-up to your own RA or SA (under 55) earns a guaranteed 4% per annum in CPF — already beating most fixed deposits. But the RSTU goes further: the first S$8,000 of each year’s top-up also qualifies for personal income tax relief — an immediate cash saving at your marginal tax rate on top of the 4% interest. For a member earning S$120,000 annually, an S$8,000 RSTU top-up saves S$920 in income tax immediately, then earns S$320 in interest over the year — a combined first-year benefit of S$1,240 on an S$8,000 investment, or an effective return of 15.5%.
RSTU Tax Relief Table — How Much Tax You Save per S$8,000 Top-Up by Income Level
| Chargeable Income | Marginal Rate | Tax Saving (S$8K top-up) | RA Interest (4%) | Total Yr-1 Benefit | Effective Return |
|---|---|---|---|---|---|
| S$40,000–S$80,000 | 7% | S$560 | S$320 | S$880 | 11.0% |
| S$80,000–S$120,000 | 11.5% | S$920 | S$320 | S$1,240 | 15.5% |
| S$120,000–S$160,000 | 15% | S$1,200 | S$320 | S$1,520 | 19.0% |
| S$160,000–S$200,000 | 18% | S$1,440 | S$320 | S$1,760 | 22.0% |
| S$200,000–S$240,000 | 19% | S$1,520 | S$320 | S$1,840 | 23.0% |
| Above S$320,000 | 22% | S$1,760 | S$320 | S$2,080 | 26.0% |
Combined S$16,000/Year Relief — Topping Up Your Own and a Family Member’s Account
If you also top up a qualifying family member’s RA or SA, you get an additional S$8,000 per year in personal tax relief — on top of your own S$8,000. The S$16,000 combined relief cap represents a maximum annual tax saving of up to S$3,520 for top earners (at 22% marginal rate), plus 4% interest on both top-up amounts. Qualifying family members include: spouse, parents, parents-in-law, grandparents, grandparents-in-law, and siblings (siblings must have annual income not exceeding S$4,000).
How the RSTU Calculator Works — Tax Relief Computation, Years to FRS/ERS & CPF LIFE Boost
Step 1 — Enter RA/SA Balance, Age and Annual Top-Up to Set the Context
The calculator takes your current SA balance (under 55) or RA balance (55+) and projects both trajectories to age 65 at 4% p.a.: one with your planned RSTU top-up each year, one without. The gap between these two lines in the chart shows the compound value of consistent RSTU contributions — often tens of thousands of dollars by retirement age.
Step 2 — Income Tax Saving Computed Using Singapore’s Progressive Tax Table
The tax saving is the difference in income tax you pay with and without the RSTU relief at your chargeable income level. The calculator applies Singapore’s IRAS progressive tax bands (YA 2026) to give an exact saving in dollars — not an approximation. Both self top-up and family member top-up relief are computed and summed into the combined saving shown in the trio cards.
Step 3 — Effective Return, CPF LIFE Boost and Years to Target
Effective return = (tax saving + RA interest) / top-up amount. The CPF LIFE boost uses the indicative factor of S$7.61 per S$1,000 of RA at age 65 to show how much extra monthly income the RSTU top-ups generate at retirement. Years to FRS/ERS is calculated by compounding the current balance at 4% with the annual top-up each year until the target is hit.
3 Real Singapore RSTU Examples — PMET Maximising S$16K Relief, Under-55 SA Build & Retired Couple
Example 1: PMET, S$90K Income, S$16K Combined
Example 2: Age 40, SA S$80K, Top Up to FRS
Example 3: S$120K Income, ERS Target
3 Expert RSTU Tips — January Timing, S$16K Family Strategy & Comparing RSTU to SRS
Always Top Up in January, Not December — The Timing Difference Compounds to Thousands
RSTU relief is claimed in the Year of Assessment in which the top-up is made. More importantly, topping up in January means the RA/SA earns 4% interest for the full 12 months of that year instead of just 1 month (if topped up in December). On a S$8,000 annual contribution over 15 years, the January-vs-December timing difference compounds to approximately S$7,000 extra in the RA by age 65 — purely from when the money entered CPF. If you also top up a family member’s account (S$8,000 more), the timing benefit doubles. Set a calendar reminder: first working day of January, transfer both RSTU amounts via the CPF website or mobile app.
The S$16,000 Combined Relief Strategy — Top Up Your Parents Every Year Without Fail
The most under-utilised RSTU strategy is the combined S$8,000 self + S$8,000 parent/spouse top-up. For a member earning S$120,000, topping up both their own RA and one parent’s RA at S$8,000 each saves S$1,840 in income tax per year — while simultaneously building two people’s CPF retirement income. Over 20 working years, S$1,840/yr in tax savings alone compounds (if invested at even 3%) to approximately S$50,000. The parent’s RA also grows at 4% p.a. — generating additional CPF LIFE income for them from age 65. The constraint: for siblings, they must have annual income not exceeding S$4,000. Parents, spouses, and parents-in-law have no income cap.
RSTU vs SRS: Which Tax-Deferral Vehicle Wins? (Answer: Both, in Different Situations)
Both RSTU and SRS provide income tax relief up to S$8,000/yr (SRS cap is S$15,300/yr for residents). Key differences: RSTU funds earn a guaranteed 4% in CPF and are locked until retirement — there is no early withdrawal. SRS funds can be invested in stocks, ETFs, and bonds with potentially higher returns, but withdrawals before 62 incur a 5% penalty plus 100% income inclusion. RSTU is superior for: certainty, zero investment risk, 4% guaranteed rate, no early withdrawal penalty. SRS is superior for: members who want investment control, higher potential returns, and moderate pre-62 flexibility. Optimal strategy: max RSTU first (to FRS/ERS), then contribute to SRS for the additional tax-deferred investment bucket. Never choose one at the expense of the other if both limits are accessible.