Home loan refinancing in Singapore means replacing your existing mortgage with a new one — usually at a lower rate, sometimes with a new bank, occasionally with the same bank under a new package. In a market where SORA has been swinging between 2.8% and 3.6% for the past 24 months, refinancing at the right moment can save a typical buyer S$3,000–S$6,000 per year.

Mistime it, and the legal costs, valuation fees and lock-in penalties wipe out the saving. This 2026 guide walks through when refinancing actually pays, how to do the break-even maths, and the traps that catch most Singapore homeowners.

What Refinancing Actually Is

When you refinance, your new bank pays off the old bank in full and a fresh loan is registered against your property. Your CPF usage, property title and outstanding principal transfer across. What changes is the interest rate structure, the lock-in period, and — if you switch bank — the lender.

Three flavours exist:

• Re-pricing (same bank, new package). No conveyancing required, no legal fees, but banks typically offer worse rates than they do to outsiders.
• Refinancing (new bank). Full switch with legal and valuation costs (~S$3,000), but meaningfully better rates.
• Refinancing from HDB loan to bank loan. A one-way door — you cannot switch back to an HDB concessionary loan afterwards.

Break-Even: The Only Calculation That Matters

Break-even is simply: how many months of lower interest does it take to repay the switching costs?

Break-even months = Switching costs ÷ Monthly interest saving

On a S$800,000 loan, dropping from 3.2% to 2.6% saves roughly S$4,800 of interest in year one (S$400/month). If the full legal + valuation cost is S$3,000 and the new bank subsidises S$2,000, net cost is S$1,000 — break-even at ~3 months. Even with zero subsidy and S$3,000 full cost, break-even is around month 13.

The Lock-In Trap

Every home loan package has a lock-in period — typically 2–3 years for fixed-rate packages, 1–2 years for floating. Refinancing during lock-in triggers a penalty of 1.5% of the outstanding principal. On a S$800k loan, that is S$12,000.

In almost every case, this penalty kills the business case for refinancing. The exception: if SORA has dropped so dramatically that even paying S$12,000 today is recouped within 2 years of lower rates. Rare, but it happens during rate-cut cycles.

The three-month rule

MAS banks require 3 months’ notice to refinance or to exit to a new lender. If your lock-in ends on 1 October, start engaging new banks by 1 July. Waiting until August leaves you paying the legacy rate for the full notice period.

When Refinancing Makes Sense in 2026

Three concrete triggers should make you look at your package:

1. Your lock-in ends within 4 months. 90% of refinancing wins come from the reset window around the end of a 2-year or 3-year fixed package. Banks actively target this window with cashback subsidies.
2. SORA 3M has moved ≥0.5% in your favour since you last locked. Tiny moves rarely pay for switching costs; 0.5%+ moves almost always do.
3. Your bank’s published rack rate is ≥0.3% above a new competitor. If your legacy package has lapsed into an expensive floating-rate default, you are overpaying regardless of macro conditions.

Fixed vs Floating at Refinance Time

The decision framework at refinance is the same as at origination: certainty vs upside. See our dedicated Fixed vs Floating Home Loan Singapore 2026 guide for a full breakdown. The only nuance at refinance time: your new package will reset your lock-in clock, so a 3-year fixed refinance locks you in for a further 3 years regardless of what happens to rates.

The Refinancing Checklist

Once you have decided refinancing makes sense, execution is largely administrative:

1. Request a fresh In-Principle Approval (IPA) from 2–3 competing banks. This is free and commits you to nothing.
2. Compare: headline rate, lock-in period, subsidy on legal & valuation, any cashback, prepayment rules.
3. Pick the package and accept the Letter of Offer. Instruct a conveyancing lawyer (the new bank typically has a panel).
4. Serve 3 months’ notice to your existing bank (email or physical letter).
5. Discharge of mortgage and registration of new mortgage happens on the redemption date, usually 8–10 weeks later.
6. Direct Debit for the old GIRO is cancelled and replaced with the new one.

The process runs itself once you sign. Your only vigilance point: verify the new monthly instalment has kicked in and the old GIRO is stopped, to avoid paying both banks briefly.

Common Mistakes

• Focusing only on headline rate. A 2.35% loan with a 3-year lock-in and no subsidy is often worse than a 2.55% loan with 2-year lock-in and S$2,000 subsidy.
• Refinancing too early. Switching costs are real. Sub-0.3% rate improvements rarely justify the effort.
• Forgetting CPF accrued interest. Refinancing does not pause CPF accrued interest — if you want to reduce it, a voluntary housing refund is the separate tool.
• Ignoring partial prepayment options. Some packages let you prepay up to 25% of outstanding without penalty. If you have a windfall, a prepayment often beats a refinance.

Frequently Asked Questions

Does refinancing affect my credit score?

Minimally. A single credit inquiry when the new bank pulls your file is normal. Multiple simultaneous applications within a short window are usually scored as a single inquiry by the Credit Bureau.

Will I need to top up cash if the property has declined in value?

Possibly. New banks will value the property afresh; if the new LTV exceeds their internal limit, they may ask for a cash top-up to bring LTV back in line. This is the biggest technical obstacle to mid-cycle refinances.

Can I refinance with my existing bank?

Yes — this is “re-pricing”. No legal fees, but typically inferior rates. Always get two outside quotes first and then negotiate.

How does refinancing interact with TDSR?

For owner-occupied properties, TDSR is not applied to refinances. For investment properties, TDSR applies with a debt-reduction plan if you are above 55%.

Is the subsidy really “free”?

It is, in the sense that the bank absorbs the legal and valuation fees — but most subsidies come with a clawback clause: redeem the loan within 3 years and you repay the subsidy. Always read the clawback condition.

What to Do Next

1. Fixed vs Floating Home Loan 2026 — the refinance decision simplified.
2. HDB Loan vs Bank Loan — especially if you are considering leaving HDB financing.
3. All Home Loans & Mortgages guides.

Disclaimer: This guide is for general information and not financial advice. Package rates and lock-in rules change frequently. Always verify current offers directly with banks or through a licensed mortgage broker.