An extra payment on a home loan may reduce principal and future interest if the lender applies the excess to principal as intended. The actual effect depends on the payment date, how the lender allocates the money and the contract. Do not assume that paying an extra 10% will shorten every borrower’s loan by the same number of years.
The referenced video discusses debt management in general, not extra payments on a mortgage. Confirm any calculation with your lender.
Questions to ask the bank before paying extra
- Will the extra amount reduce principal immediately, or be held as an advance installment?
- Are there fees or restrictions on early payment?
- After the extra payment, can you choose between a shorter term and a lower installment?
- Request a revised repayment schedule and compare total interest with the no-extra-payment scenario.
- Check the settlement balance and any refinancing fee separately from a partial extra payment.
Keep an emergency reserve and address higher-cost debt before deciding to use a lump sum to pay down a mortgage. The Bank of Thailand describes an exception to prepayment-fee measures for mortgage refinancing within the first three years, subject to the conditions. Do not treat that summary as a substitute for your own contract.
Compare this option with refinancing or retention, and review monthly obligations before changing a loan with the DSR guide.
Sources
- Bank of Thailand: Prepayment fees
- Bank of Thailand: Refinancing and debt consolidation
- Bank of Thailand: Check terms before a transaction
Updated October 16, 2026. Savings and the number of payments reduced depend on the outstanding balance, rate and actual contract. The linked video does not explain mortgage prepayments.