What is a lock in period on a home loan?

Borrowers sometimes only discover their lock in terms when they try to refinance and are surprised by an early redemption charge they had forgotten was in the contract they signed years earlier.

Why banks impose a lock in period

Banks price their most attractive rates on the expectation that a borrower will stay with them for a minimum period, since acquiring and servicing a mortgage customer carries fixed costs the bank wants a reasonable chance to recover. The lock in period is the mechanism that protects that expectation: if you leave early, whether by refinancing to another bank or fully redeeming the loan, say from a property sale, the penalty compensates the bank for the shortened relationship.

What actually triggers the penalty

The penalty is triggered by full or substantial early redemption during the lock in window, which includes refinancing to a different bank, selling the property and paying off the loan in full, or making a lump sum repayment beyond whatever free prepayment allowance your specific loan agreement permits. Ordinary monthly instalments do not trigger it; it is specifically about redeeming the loan ahead of the agreed schedule. Many banks allow a limited annual partial prepayment, often a set percentage of the outstanding loan, without penalty, so check your specific contract for that allowance before assuming any extra payment is penalty free.

How the penalty is usually calculated

Early redemption penalties are typically expressed as a percentage of the loan amount being redeemed early, commonly in the region of 1.5%, though the exact figure, and whether it steps down in later years of the lock in period, depends entirely on your specific bank and package. This is a cost you should always confirm directly from your loan offer letter rather than assuming a standard figure applies, since terms differ meaningfully across banks and even across packages from the same bank.

Weighing the lock in period when choosing a loan

A shorter lock in period gives you more flexibility to refinance sooner if a better rate appears, but the headline rate on offer may not always be as sharp as a package with a longer lock in, since the bank is trading rate for certainty over that period. If you expect to sell the property, restructure your finances, or otherwise need to redeem the loan within a few years, a shorter or no lock in package is usually worth the trade off even at a slightly less competitive rate, since it avoids the early redemption penalty altogether.

What to check before signing

Before committing to a loan package, confirm the exact lock in duration, the early redemption penalty percentage and how it is calculated, whether the penalty steps down over the lock in period, and what free partial prepayment allowance, if any, is included. These terms sit in the loan offer letter and are worth reading carefully rather than assuming they match a previous loan you have held, since packages and terms change frequently across banks and over time.

Frequently asked questions

Does selling my property during the lock in period trigger a penalty?

Generally yes, since selling requires redeeming the loan in full, which counts as early redemption under most loan agreements. Some banks carve out exceptions for a sale, but this varies by bank and package, so check your specific loan contract before assuming either way.

Is a longer lock in period always a worse deal?

Not necessarily. A longer lock in sometimes comes with a lower headline rate in exchange for the bank's certainty over that period, so the right choice depends on how confident you are that you will not need to refinance, sell, or restructure your finances during that window.

Can I make partial repayments during the lock in period without penalty?

Many banks allow a limited amount of partial prepayment each year without penalty, but anything beyond that threshold, or a full redemption, typically triggers the early redemption charge. Check your specific loan agreement for the exact free prepayment allowance.

Winfred Quek is an Associate Marketing Consultant at Crestbrick Pte Ltd (CEA Licence No. L31010886H). CEA R073319H. This page is for general information only and does not constitute financial, investment, or legal advice. Rates and rules reflect the position as at 9 Aug 2026; verify current figures with IRAS, HDB, or MAS before making any decision.