Voluntary scheme that lets you top up your own or a family member's Special / Retirement Account. Cash top-ups qualify for income tax relief, capped at S$8,000 self + S$8,000 family member per year.
The Retirement Sum Topping-Up Scheme is the official CPF channel for putting extra cash into your Special Account (before 55) or Retirement Account (from 55) — and for topping up parents' or siblings' accounts.
Top-ups are one-way: once contributed, they cannot be withdrawn early. This is the trade-off for the income tax relief.
Self top-up: S$8,000 tax relief per year. Top-up must go into your own SA or RA.
Family member top-up: another S$8,000 tax relief for cash top-ups to parents, parents-in-law, grandparents, grandparents-in-law, spouse, or siblings.
Combined cap: S$16,000 of tax relief per year if you do both.
A Singapore taxpayer with S$120,000 chargeable income has a marginal tax rate of 15%.
Topping up S$8,000 to their own SA saves S$1,200 in tax. Add a S$8,000 top-up to a parent's RA, and they save another S$1,200 — total S$2,400 tax saved.
Done annually from age 30 to 55, those tax savings compound. At a conservative 4% CPF SA return, the S$8,000 also grows to ~S$17,000 by age 55, then keeps earning until CPF LIFE kicks in.
Should you top up cash or transfer OA → SA? Cash top-ups give tax relief; OA → SA transfers don't. If you'll pay tax anyway, cash top-ups are more efficient.
Is RSTU better than SRS? Both give tax relief. RSTU goes into CPF (locked until 55+, 4% guaranteed). SRS is more flexible — you can withdraw from 62 and invest in equities — but has no guaranteed return.
The S$8,000 cap applies whether you contribute in January or December. Top up early in the year to capture more compounding.
Up to S$8,000 per year for cash top-ups to your own Special / Retirement Account, plus another S$8,000 for cash top-ups to family members' accounts (parents, spouse, siblings, grandparents). Combined cap: S$16,000 of tax relief per year, subject to the S$80,000 personal relief cap.
Parents, parents-in-law, grandparents, grandparents-in-law, spouses, and siblings. The recipient's account must be below their Full Retirement Sum (or BRS if they own property) for the top-up to qualify for tax relief.
By 31 December of the calendar year. RSTU contributions are credited based on when they clear in the CPF system, so make payments at least a few business days before year-end to be safe.
No — RSTU contributions become part of your CPF balance and follow normal CPF withdrawal rules. You can withdraw only what's above your Retirement Sum at 55 (or above BRS with property). The lock-in is the trade-off for the tax relief.