They Repriced from 3.1% to 1.5%. Now What Do They Do With the $795?

Daniel and Mei did the responsible thing this month. Their condo loan — about $1,000,000 with 25 years to run — had been sitting on a 3.10% rate from the last cycle, and they finally repriced it to 1.50%. Their monthly repayment dropped from $4,794 to $3,999, freeing up $795 a month they weren't spending before. The reprice was the easy decision. The harder one is what they do with that $795, because the obvious answer — "throw it at the loan" — isn't obviously right when the loan only costs 1.5%. Here is the math, both ways.

Daniel and Mei are a composite — a profile built from typical figures, not real clients. The assumptions are stated; the workings below are the real calculations for those assumptions.

First, what the reprice alone bought them

Before deciding anything, it's worth naming the win they already have. At 3.10% over 25 years, a $1M loan costs $4,794 a month. At 1.50%, it costs $3,999. That's $795 a month, $9,539 a year, and just over $19,000 across a two-year lock-in — for a phone call and a few hundred dollars in conversion fees. Everything below is about a smaller, optional second decision. The reprice itself was free money, and they've already taken it.

The temptation now is to keep their lifestyle exactly as it was — they were comfortable paying $4,794 — and route the $795 somewhere productive. Two destinations compete: the loan, or the market.

Option A: keep paying the old amount, overpay the loan

Suppose Daniel and Mei simply keep paying $4,794 a month even though the bank now only asks for $3,999. The extra $795 goes straight to principal every month at their new 1.50% rate. The effect:

Overpaying clears the loan 4.8 years early and saves about $40,400 in interest. Crucially, that saving is certain. Every dollar of principal you prepay earns a guaranteed return exactly equal to the loan rate — 1.50% — because it's 1.50% of interest you now never pay. There's no market risk, no sequence-of-returns risk, nothing to monitor. For a household that values a paid-off home and sleeps better watching the balance fall, this is a clean, defensible answer.

Option B: pay the minimum, invest the $795

The alternative is to pay only the $3,999 the bank requires and invest the $795 every month for the same 25 years. What that becomes depends entirely on the return:

The first row is the pivot. Investing at exactly 1.50% produces the same outcome as overpaying — because overpaying is a guaranteed 1.50% investment. So the real question is narrow: can Daniel and Mei reliably earn more than 1.50% after tax and fees on money they'd otherwise prepay?

That hurdle is unusually low. In a 3% or 4% rate environment, prepaying a mortgage is a strong guaranteed return and investing has to clear a high bar to beat it. At 1.50%, the bar is on the floor. Singapore CPF OA pays 2.50% risk-free; a plain balanced portfolio has historically cleared 4%. Even allowing for risk, the spread between a 1.50% loan and almost any diversified investment is wide enough that, on expectation, investing the difference comes out ahead — often by $100,000 or more over the full horizon, as the 4% and 6% rows show.

So why would anyone still overpay?

Because expectation isn't certainty, and three things tilt real households back toward the loan.

Behaviour beats spreadsheets. Option B only works if the $795 is actually invested, every month, for 25 years, without being raided for a holiday or a renovation. Overpaying is automatic and irreversible in the right way — the money is gone into the home, not sitting in an account tempting you. Many people earn the guaranteed 1.5% reliably and would not earn the hypothetical 4% reliably.

The rate won't stay 1.50%. The 1.50% is locked for the lock-in, then reprices into the next cycle. If their rate drifts back to 3% in a few years, the overpay math gets better (every prepaid dollar then saves 3%), and the case for investing weakens. A household that overpaid early will have a smaller balance exposed when rates rise — a quiet hedge.

Risk capacity is personal. A couple a few years from retirement, or with one income, may rationally prefer a shrinking debt to a volatile portfolio, even at the cost of expected return. The "wrong" answer financially can be the right answer for sleep.

What we'd actually suggest

The honest split isn't all-or-nothing. With a 1.50% loan rate, the math leans toward investing the difference for anyone with a long horizon, an existing investing habit, and the stomach for market swings — the 1.5% hurdle is simply too low to justify locking everything into guaranteed prepayment. But the moment the discipline is in doubt, or the horizon is short, or the rate is about to reset higher, overpaying wins on certainty and behaviour.

A reasonable middle: keep an emergency buffer and any maxed-out tax-advantaged room first, invest the bulk of the $795 while the rate is this low, and revisit at the next reprice. If rates climb back toward 3%, flip the dial toward the loan — because at that point the guaranteed return finally rivals the market one again.

Daniel and Mei's real win was the reprice, and they've banked it. The $795 question is a good problem to have. The one answer that's clearly wrong is letting the $795 quietly leak into lifestyle and earning nothing at all.

Sources: indicative repricing and board rates as at June 2026 (PropertyNet.SG); CPF Ordinary Account interest rate 2.50% p.a. (CPF). Monthly repayments, interest totals, payoff timing and future values computed for the stated assumptions ($1,000,000 loan, 25-year tenure, 3.10% → 1.50% reprice).

Daniel and Mei are an illustrative composite, not real clients. Silas Tan is a District Director at Huttons Asia and co-founder of TRIBE. He built the Resale Project Scorecard (RPS) using 126,000+ URA REALIS transactions. This article is for informational purposes and does not constitute financial or investment advice. CEA Registration R000303I.