Set the inputs
Enter the outstanding balance, rates and terms for the old and new loans, plus refinancing costs.
Refinance break-even
Compare keeping a loan with refinancing, including fees, payments and remaining debt over the same horizon.
Result
Adjust the example inputs, then calculate.
Same starting debt: upfront costs + cumulative payments + terminal debt. Financed fees are not also charged upfront. NPV discounts payments and terminal debt using nominal annual / 12. Lower monthly payments need not mean overall savings. No automatic tax relief or unentered cashback.
How to use this calculator
Check the terms
Use one comparison horizon. Check that end-of-horizon cost includes remaining principal, not only installments paid.
Read the result
Read break-even alongside total cost and remaining debt. Lower installments may not recover the refinancing fees.
A worked example
Illustrative calculation
If old and new loan terms are identical but refinancing costs 5,000 THB upfront, the total cost rises by 5,000 THB.
Compare a second scenario
Keep both loans unchanged and increase refinancing fees. Check whether break-even moves later or disappears within the selected horizon.
Common questions
Where does my information go?
Calculations run in your browser. Financial inputs are neither saved locally nor sent to analytics. Reloading restores the initial values.
What are this model’s limitations?
Future promotional-rate resets, unentered expenses and refinance approval are not predicted. Review actual contract terms and penalties.