A CPF cash top-up under the Retirement Sum Topping-Up (RSTU) scheme does two things at once: it earns 4% a year guaranteed, and it cuts your income tax. In 2026 you can get tax relief on up to $8,000 of cash top-ups to your own CPF, plus another $8,000 for top-ups to eligible family members, so $16,000 a year in total. If you are below 55 the money goes into your Special Account, up to the Full Retirement Sum of $220,400; if you are 55 or older it goes into your Retirement Account, up to the Enhanced Retirement Sum of $440,800. Every dollar you put in eventually buys a larger CPF LIFE payout for the rest of your life. The catch is that the money is locked away for retirement, and the top-up must reach CPF by 31 December to count for the next Year of Assessment. This guide covers who should top up, how much relief you actually get, the difference between RSTU and a Voluntary Contribution, and the trade-offs against SRS and just investing the cash.
People mix up CPF top-ups all the time, because there are two separate schemes and they behave differently. Getting the names right matters, because only one of them is built for retirement income and earns the higher interest rate.
The Retirement Sum Topping-Up (RSTU) scheme is the one most young working adults care about. You make a cash top-up that goes into your Special Account if you are below 55, or your Retirement Account if you are 55 or older. This money earns the floor rate of 4% a year and is committed to your future CPF LIFE payouts. RSTU top-ups qualify for tax relief.
A Voluntary Contribution (VC) is the second route. You can make a Voluntary Contribution to your MediSave Account on its own, or a Voluntary Contribution that gets split across all three accounts (Ordinary, Special and MediSave) in the same proportion as a mandatory contribution. The all-three-accounts version mostly matters for the self-employed, who use it to build savings beyond their compulsory MediSave amount. Only the MediSave portion of a VC attracts tax relief for employees.
If your goal is a bigger guaranteed retirement income and a tax deduction, use RSTU. It directs every dollar to retirement at 4%, and it is the simplest to claim relief on. If you are self-employed and want to build your Ordinary Account for housing as well, the all-account VC has a place, but for pure retirement saving RSTU is cleaner. The rest of this guide focuses on RSTU, with a note on the MediSave route where it helps.
There is a third move people confuse with RSTU: a CPF transfer. Instead of putting in fresh cash, you move money you already have in your Ordinary Account into your Special Account (below 55) or Retirement Account (55 and above). The point is to shift savings from the 2.5% Ordinary Account into the 4% Special or Retirement Account, so the same dollars earn the higher rate for the rest of your working life.
The trade-off is that a transfer gives no tax relief and no matching grant, only the rate uplift, and it is just as locked as a cash top-up once it lands. A cash top-up is fresh money from your bank, qualifies for relief, and is the route this guide is built around. Use a transfer when you have idle Ordinary Account savings you are sure you will not need for a flat, and you have already spent the cash relief you want for the year. The CPF OA vs SA comparison walks through when shifting the money makes sense.
RSTU has a hard ceiling, and it is tied to the retirement sums. You can only top up until your account reaches the current sum for your age band.
If you are below 55, you can top up your Special Account until it hits the Full Retirement Sum, which is $220,400 for 2026. If you are 55 or older, you can top up your Retirement Account until it reaches the Enhanced Retirement Sum, $440,800 for 2026. Once you hit that ceiling for the year, the system blocks further RSTU top-ups. Because the ERS rises each year, someone already at last year's ceiling can usually top up a bit more when the new year's higher figure takes effect. The full set of figures sits in the CPF retirement sum guide.
| Your age | Account topped up | Top-up ceiling (2026) |
|---|---|---|
| Below 55 | Special Account | Full Retirement Sum, $220,400 |
| 55 and above | Retirement Account | Enhanced Retirement Sum, $440,800 |
MediSave has its own separate ceiling, the Basic Healthcare Sum (BHS). For 2026 the BHS is $79,000 for members below 65, and it is reviewed every year. You can make a voluntary cash top-up to your MediSave Account up to the gap between the BHS and your current MediSave balance, and no further. Top up past the BHS and CPF refunds the excess to your bank account, so there is no way to over-stuff the account.
A MediSave top-up earns the same 4% floor and counts towards the same $8,000 own-account relief as an RSTU top-up, not on top of it. For most people building retirement income, RSTU into the Special or Retirement Account is the better use of that $8,000 cap, because Special and Retirement Account savings feed CPF LIFE while MediSave is ring-fenced for healthcare. A MediSave top-up makes sense mainly when your MediSave is short and you want the buffer for hospital bills and insurance premiums. The MediSave Account explainer covers what the account pays for.
This is the part that pulls people in. Cash top-ups under RSTU qualify for the CPF Cash Top-up Relief, set by IRAS.
You can claim relief on up to $8,000 of cash top-ups to your own CPF accounts in a calendar year. On top of that, you can claim relief on up to $8,000 of cash top-ups to eligible family members, giving a combined cap of $16,000 a year. MediSave top-ups count towards the same $8,000 own-account cap, so if you top up both your Special Account and your MediSave, the relief is shared across them, not stacked.
Relief is a deduction from your taxable income, not a rebate, so its cash value depends on your marginal tax rate, and the saving only equals that rate if the whole $8,000 reduction stays inside one bracket. Under the resident rates, chargeable income from $40,000 to $80,000 is taxed at 7%, from $80,000 to $120,000 at 11.5%, and from $120,000 to $160,000 at 15%. So someone with chargeable income of about $100,000 has the full $8,000 sitting in the 11.5% band, and the top-up saves roughly $920 in tax; someone around $140,000 is in the 15% band and saves about $1,200. If your income sits right at a bracket edge, part of the top-up saves at the lower rate, so the figure is smaller. If you earn so little that you pay no income tax, the relief is worth nothing to you, and the only reason to top up is the 4% interest and the locked-in retirement income. Run your own bracket through the income tax calculator before assuming the deduction is large.
One ceiling catches high earners: all your personal income tax reliefs together are capped at $80,000 a year. If you already hit that cap from CPF contributions, SRS and other reliefs, an extra top-up gives you no further tax saving, though it still earns 4%.
The extra $8,000 of relief is for cash top-ups to your spouse, siblings, parents, parents-in-law, grandparents and grandparents-in-law. This is how a lot of Singaporeans support their parents' retirement and shave their own tax bill at the same time.
For top-ups to your spouse or siblings, there is an income test: they qualify only if their income in the year before the top-up did not exceed $8,000 (the IRAS threshold raised from $4,000 from Year of Assessment 2025 onwards), or if they are handicapped. There is no income test for top-ups to parents, parents-in-law, grandparents or grandparents-in-law. The recipient's own top-up ceiling still applies, so you cannot push a parent's Retirement Account above the prevailing Enhanced Retirement Sum.
From Year of Assessment 2026, a change bites: cash top-ups that attract a matching grant under the Matched Retirement Savings Scheme (MRSS) no longer qualify for CPF Cash Top-up Relief. MRSS matches dollar-for-dollar up to $2,000 a year for eligible lower-income members, with a $20,000 lifetime cap. The match itself is still paid; you just stop getting the tax deduction on the matched portion. If you top up a parent who is on MRSS, the first $2,000 that draws the grant gives no relief, so plan the amounts with that in mind.
Tax relief follows the calendar year the top-up is made, not when you file. To get relief in the next Year of Assessment, your top-up application and payment must reach CPF by 31 December.
Leaving it to the last week is risky because GIRO and some transfer methods take time to clear. The cleanest options are PayNow QR through the CPF mobile app, which is near-instant, or the e-Cashier on the CPF website. Set a reminder for mid-December rather than the 31st. If you miss the year, the top-up still happens and still earns interest; you just claim the relief one Year of Assessment later than you hoped.
There is no need to claim manually. CPF reports your eligible top-ups to IRAS, and the relief is pre-filled in your tax return.
The mechanics take a few minutes once you know where to go. A top-up to your own account is faster than a top-up to family, because a family top-up needs the recipient's details and a relationship declaration.
For a one-off cash top-up, the quickest path is the CPF mobile app: open it, go to the Retirement top-up service, pick whose account you are topping up, enter the amount, and pay by PayNow QR. The money usually lands the same day. The e-Cashier on the CPF website does the same thing if you prefer a desktop. If you want a top-up every month instead of one lump sum, set up a GIRO arrangement so a fixed amount leaves your bank account automatically; this also spreads the cost across the year rather than a single December hit.
Before you pay, the app shows how much room you have left under your relief cap and your top-up ceiling for the year, so you do not accidentally overpay. Keep the transaction reference until the relief shows up pre-filled in your next tax return.
The reason RSTU is attractive even ignoring tax is the interest. Special and Retirement Account savings earn a floor of 4% a year, and that floor has been extended through 31 December 2026. The Ordinary Account earns 2.5%.
Younger members get extra interest on top. Below 55, you earn an extra 1% on the first $60,000 of combined CPF balances. From 55, you earn an extra 2% on the first $30,000 and an extra 1% on the next $30,000. So an early dollar in your Special Account can compound at up to 5% below 55, or up to 6% in the first slice after 55. That is a government-guaranteed return, and it is why a top-up made in your 30s is worth far more by retirement than the same dollar topped up at 60. See the live figures in the CPF interest rates guide.
The flip side of the 4% floor is that it is a floor, not a market return. If you can stomach volatility and a long horizon, a diversified portfolio has historically beaten 4% over decades. A top-up is the low-risk slice of a retirement plan, not the whole thing. The compound interest calculator lets you compare 4% guaranteed against a riskier assumed return over your own timeline.
Money you top up does not vanish into a black box. It sits in your Special Account, then moves to your Retirement Account at 55, earns 4% the whole way, and is later used to buy into CPF LIFE, the national annuity that pays you every month for as long as you live.
The more you set aside in your Retirement Account, the higher your monthly payout. As a rough guide for the 2026 cohort, the Basic Retirement Sum of $110,200 supports about $950 a month, the Full Retirement Sum of $220,400 about $1,780 a month, and the Enhanced Retirement Sum of $440,800 up to about $3,440 a month, all from age 65. Topping up moves you along that scale. Estimate your own figure with the CPF LIFE payout calculator.
You can also raise the payout by starting later. CPF LIFE payouts can begin any time from 65 to 70, and each year you defer lifts the monthly amount by up to 7%, so waiting until 70 adds up to about 35% more. A top-up plus a deferral compound on each other. If you make no choice, you are automatically placed on the Standard Plan, and payouts start by the time you reach 70.
Topping up grows the pot, but the plan you pick decides how that pot is paid out. CPF LIFE has three plans, and the choice changes the shape of your monthly income for the rest of your life. You can be placed on a plan automatically, so it pays to choose on purpose.
The Standard Plan is the default: a level payout that stays flat from 65 onwards. The Escalating Plan starts lower but rises 2% every year for life, which is built for inflation. The Basic Plan starts lowest and steps down further once your combined CPF balances fall below $60,000 in retirement, leaving more in your own accounts to earn interest and pass on. All three pay out for as long as you live, and any unused premium plus remaining CPF savings goes to your nominees as a bequest.
A bigger Retirement Sum from topping up lifts the starting payout on every plan. The plan choice then decides whether that income stays flat, climbs with prices, or tapers. Most people choosing today lean Standard for a simple flat income or Escalating if they expect a long retirement and want the later years protected. The CPF LIFE plans comparison sets the three side by side, and the CPF LIFE payout calculator shows the starting figure for each.
| Plan | How the payout moves | Starting payout | Suits |
|---|---|---|---|
| Standard (default) | Stays level for life | Higher than Escalating at the start | A flat, predictable income |
| Escalating | Rises 2% every year for life | Lowest at the start, overtakes Standard later | Long retirement, inflation worry |
| Basic | Steps down once combined balances drop below $60,000 | Lowest overall | Leaving more savings for bequest |
A top-up makes the payout bigger, but a flat payout still loses ground to rising prices. CPF puts it plainly: $1,000 of payouts today may buy only what about $1,500 buys in 20 years, so a level income at 65 stretches less by 85. This is the real reason the Escalating Plan exists.
Two levers deal with it. The first is choosing the Escalating Plan so the payout itself climbs 2% a year. The second is topping up earlier and harder, so the starting payout is high enough that even a flat Standard Plan stays comfortable deep into retirement. Most people use a mix: top up enough to set a strong base, then decide between a level income now and a rising one later based on how long they expect to live and what other income they hold. Model your own gap with the retirement calculator and read how prices erode savings in the inflation explainer.
RSTU is not the only way to cut tax for retirement, and it is not always the best fit. The two common alternatives are the Supplementary Retirement Scheme (SRS) and simply investing the cash yourself.
SRS gives tax relief too, up to a $15,300 contribution a year for citizens and PRs. The difference is liquidity and flexibility. SRS money can be withdrawn before retirement (with a 5% penalty and full tax on the amount), and it can be invested in shares, funds, fixed deposits and Singapore Government Securities, so you control the return and risk. CPF top-ups are locked until your payout age and earn a fixed 4%. The side-by-side trade-offs are laid out in SRS vs CPF top-up and the dedicated SRS calculator.
Investing the cash outside any scheme gives no tax relief but maximum freedom. For a young person with a 30-year horizon and an existing emergency fund, a low-cost index portfolio may end up larger than a CPF top-up, at the cost of higher risk and no guarantee. A reasonable middle path: top up enough to capture the tax relief you value, keep a separate liquid buffer, and invest the rest. The CPF pillar guide puts these pieces together.
| Feature | RSTU top-up | SRS | DIY investing |
|---|---|---|---|
| Tax relief | Up to $8,000 (own) | Up to $15,300 (citizen/PR) | None |
| Return | 4% floor, guaranteed | You choose; cash earns ~0% | Market, not guaranteed |
| Access before retirement | Locked | Allowed, 5% penalty + tax | Anytime |
| Annual deadline for relief | 31 Dec | 31 Dec | Not applicable |
A top-up is close to irreversible. Once cash is in your Special or Retirement Account it is committed to retirement and cannot be withdrawn on demand. Work through these before you commit money this year.
You can claim CPF Cash Top-up Relief on up to $8,000 of cash top-ups to your own CPF accounts in a calendar year, plus up to a further $8,000 for top-ups to eligible family members, for a combined cap of $16,000. MediSave top-ups share the same $8,000 own-account limit. All personal reliefs together are capped at $80,000 a year.
If you are below 55, a Retirement Sum Topping-Up cash top-up goes into your Special Account, up to the Full Retirement Sum of $220,400 for 2026. If you are 55 or older, it goes into your Retirement Account, up to the Enhanced Retirement Sum of $440,800. Both earn the 4% floor rate.
Your top-up application and payment must reach CPF by 31 December to qualify for relief in the next Year of Assessment. Use PayNow through the CPF app or the e-Cashier for near-instant payment rather than GIRO, which can take days to clear. The relief is pre-filled in your tax return, so you do not claim it manually.
No. Cash top-ups under RSTU are committed to retirement. Once the money is in your Special or Retirement Account it cannot be withdrawn on demand and is later used for your CPF LIFE payouts. Treat a top-up as a permanent decision and keep a separate liquid emergency fund.
They serve different goals. A CPF top-up earns a guaranteed 4%, gives up to $8,000 in relief, and is locked until your payout age. SRS gives up to $15,300 in relief for citizens and PRs, can be invested as you choose, and can be withdrawn early with a 5% penalty and tax. If you want certainty and a higher guaranteed rate, CPF wins; if you want flexibility and investment control, SRS does.
Yes, top-ups to parents, parents-in-law, grandparents and grandparents-in-law qualify for relief with no income test on the recipient. The exception is the Matched Retirement Savings Scheme: from YA2026, cash top-ups that draw the MRSS matching grant (the first $2,000 a year) no longer attract CPF Cash Top-up Relief, though the government still pays the match.
It depends on how much you top up and your timeline, since the money compounds at 4% until your payout age. As a 2026 guide, reaching the Full Retirement Sum of $220,400 supports about $1,780 a month from 65, and the Enhanced Retirement Sum of $440,800 up to about $3,440 a month. Deferring payouts past 65 adds up to 7% a year on top.
A cash top-up is fresh money from your bank into your Special or Retirement Account; it qualifies for up to $8,000 in tax relief and can draw a matching grant. A CPF transfer moves money you already hold in your Ordinary Account into the Special or Retirement Account to earn the higher 4% rate, but it gives no tax relief and no matching grant. Both lock the money for retirement. Use a cash top-up for the tax break, a transfer to lift the rate on idle OA savings.
Yes. You can make a voluntary cash top-up to your MediSave Account up to the Basic Healthcare Sum, which is $79,000 for 2026 for members below 65. Anything above the BHS is refunded to your bank account. A MediSave top-up earns the same 4% floor and shares the same $8,000 own-account tax relief cap as an RSTU top-up, so it does not give you extra relief on top.
There are three plans. The Standard Plan, the default, pays a level amount for life. The Escalating Plan starts lower but rises 2% a year to keep up with inflation. The Basic Plan starts lowest and steps down once your combined CPF balances fall below $60,000, leaving more for bequest. A top-up raises the starting payout on all three; pick Standard for a simple flat income or Escalating if you expect a long retirement and want the later years protected.
This is general financial information for Singapore, not personal financial advice. Figures change — verify current rates against the official sources above before acting. See our full disclaimer.