Why refinance a mortgage?
Mortgage refinancing replaces an existing home loan with a new loan. A borrower may refinance to lower the rate, change the remaining term, move from an adjustable rate to a fixed rate, or consolidate loan costs into a clearer payment plan.
The key question is not only whether the new payment is lower. Compare the remaining principal, refinance costs, interest over the new term, and the time needed to recover those costs before deciding.
Should I refinance my mortgage - the rule of thumb
A common rule of thumb is to refinance only when the rate reduction and payment savings justify the closing costs within the time you expect to keep the loan. The break-even point shows how many months of savings are needed to recover points and fixed refinance costs.
Rules of thumb are useful for screening, not final approval. A shorter term can raise the payment while reducing total interest, and a longer term can lower the payment while increasing the total amount paid.
- Lower rate: compare payment savings and total interest.
- Shorter term: check whether the higher payment fits the budget.
- Cash-out amount: confirm that the new balance still leaves enough equity.
- Closing costs: include lender fees, points, appraisal, title, and other settlement charges.
Common types of refinance mortgage loans
Rate-and-term refinancing changes the rate, term, or both without intentionally increasing the loan balance for cash proceeds. It is often used to reduce monthly payment, shorten payoff time, or move to a more predictable loan structure.
Cash-out refinancing increases the new principal above the old balance and pays the excess to the borrower. It can be useful when the cash is deployed productively, but it also turns home equity into secured debt.
How to refinance mortgage?
Start by entering the current mortgage amount, original loan date, term, interest rate, and compounding frequency. Then enter the proposed refinance date, term, rate, compounding frequency, points, fixed refinance costs, and any cash adjustment.
The calculator estimates the current remaining balance, new principal, current and new monthly payments, refinance costs, break-even period, and interest savings. Use lender disclosures for final numbers because escrows, prepaid interest, tax treatment, and local closing costs can change the result.
How to use the mortgage refinance calculator
Use the Current mortgage section for the original loan details and the Mortgage refinancing section for the new loan offer. Currency is only a display choice; it does not convert exchange rates.
Mortgage points are treated as a percentage of the new principal, and costs of refinancing are added as a fixed amount. Cash out increases the new principal, while cash paid into refinance reduces it.
- Keep interest rates as annual percentages.
- Use the same compounding convention shown in the loan offer.
- If the break-even point is longer than your expected holding period, refinancing may not recover its costs.
- Review monthly payment change, total interest saved, and net savings after refinance costs together.
Disclaimer
This calculator is a planning estimate based on standard amortization math. It does not replace a loan estimate, closing disclosure, tax advice, or lender underwriting.
Actual refinance offers may include escrow changes, mortgage insurance, prepayment penalties, discount points, origination charges, title fees, and rounding rules that are not fully modeled here.
FAQs
A lower monthly payment can still cost more over time if the new term is much longer or fees are high. Compare the total interest change and break-even point before relying on the payment alone.
Cash-out refinance proceeds are not free money. They increase secured debt and can raise the payment or extend the payoff period even when the stated rate is lower.