CPF Accrued Interest Calculator Singapore: Lump Sum and Monthly Use

Estimate the principal and interest associated with a new sequence of CPF housing withdrawals. Use the initial field for the amount withdrawn at the start, and the monthly field for later housing payments. For a sale already in progress, obtain your actual CPF refund statement.

Worked example matching the defaults

S$100,000 is withdrawn at the start of January, followed by S$1,000 at the start of each month for five years, including the first January. Principal used is S$160,000. At a constant 2.5% annual rate, the model gives S$17,070.92 interest and S$177,070.92 principal plus interest.

For a pure lump sum, enter S$200,000 initial and zero monthly. Five full January-to-December years produce S$226,281.64. This equals S$200,000 × 1.025⁵.

Calculation method

Each projected withdrawal stops earning interest for its month. The model accumulates foregone interest at annual rate ÷ 12, adds it to the balance after each December, and includes accrued but not yet capitalised interest at the projection end. It therefore compounds annually, not monthly. CPF: housing accrued interest and annual compounding. CPF: monthly interest calculation and annual crediting.

The start month controls the first annual compounding boundary. All monthly withdrawals occur at the start of the month; sale/refund is assumed after the final projected month. A zero-year period has no additional monthly withdrawals or interest.

What this does not reproduce

This is a constant-rate projection, not CPF’s transaction ledger. It omits changing rates, earlier withdrawal history, voluntary refunds, grants allocated under special rules, property pledges and each co-owner’s actual usage. Do not put the total of years of past withdrawals into the initial field and expect an exact historical result. The official dashboard is the better source for past principal and accrued interest.

Refunds are not always the full projection

If a property is sold at market value and the sale price after repaying the housing loan is insufficient for the required CPF refund, CPF does not require a cash top-up for that shortfall. This is not a waiver of the housing loan or other transaction costs. Selling below market value needs separate confirmation. CPF: housing refunds and a market-value sale shortfall.

Before 55, housing refunds generally return to OA. At 55 or above, the refund first restores the required retirement sum in RA, with the remainder staying in OA. Withdrawal and reuse for housing are subject to the applicable rules; do not assume the entire refund is freely spendable. A property pledge can create an additional refund requirement. CPF: using housing refunds before and after age 55. CPF: why housing savings and interest are refunded.

Last updated: 14 Sep 2026 · Editorial Policy · Advertising Disclosure · Corrections