How is a Vietnam personal loan repayment calculated?

It uses the standard amortising formula M = P x r(1+r)^n / ((1+r)^n - 1), where P is the amount borrowed, r is the monthly rate (annual rate divided by 12) and n is the number of months. Each instalment pays interest first, with the rest reducing the balance.

What interest rates apply in Vietnam?

Bank personal loans (vay tin chap) typically range from about 15% to 30% per year. Fintech and consumer finance lenders can charge effective rates of 25% to 45% or more. Always check the contract rate, since some quote a flat rate that is higher in effective terms.

What is a flat rate versus a reducing-balance rate?

A reducing-balance rate (used here) charges interest only on the outstanding balance, so interest falls over time. A flat rate charges interest on the original principal for the whole term, which costs much more — confirm which your lender uses.

Does paying early save money?

Yes. Reducing the balance early means less interest accrues and the loan ends sooner, though many Vietnamese lenders charge an early-settlement fee of a few percent. Check the contract for prepayment penalties.

Does this calculator store my data?

No. Everything is computed locally in your browser and nothing is uploaded, so your details remain private.

Vietnam Personal Loan Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

This Vietnam personal loan calculator models a standard amortising personal loan (vay tin chap) repaid in fixed monthly instalments. Enter the amount, the annual interest rate and the term in months to see your repayment, total interest and a full schedule.

How it works

Each instalment is fixed under the standard annuity formula:

M = P x r (1 + r)ⁿ / ((1 + r)ⁿ − 1)

where P is the principal, r is the monthly rate (annual rate ÷ 12 ÷ 100) and n is the number of months. This is a reducing-balance calculation: early instalments are mostly interest, later ones mostly principal. The schedule below shows the split each month.

Example

Borrow VND 100,000,000 at 20% per year over 24 months. The monthly rate is 20 ÷ 12 = 1.667%, giving a fixed instalment of roughly VND 5,090,000 and total interest of about VND 22,200,000 over the loan.

Notes

Vietnamese banks typically charge 15-30% per year on unsecured personal loans, while consumer-finance and fintech lenders can be much higher. Beware flat-rate quotes — they look cheaper but cost more than the equivalent reducing-balance rate shown here. Insurance, processing fees, and early-settlement penalties are not included; always check the full contract before borrowing.