Last updated: October 5, 2026 · Rates in the example are illustrations, not current market rates.
Refinancing replaces your current mortgage with a new one, usually to get a lower rate, change the loan term, switch from an adjustable to a fixed rate, remove mortgage insurance or take cash out. Done right, it can save tens of thousands of dollars. Done carelessly, it can cost more than it saves. Here is the process step by step, with the math that tells you whether it is worth it.
Step 1: Define your goal
- Lower monthly payment: a lower rate, a longer term or both.
- Less total interest: a lower rate and the same or shorter term.
- Pay off sooner: switch to a 15- or 20-year loan. See 15-year vs. 30-year mortgage.
- Stability: move from an ARM to a fixed rate. See ARM vs. fixed-rate mortgage.
- Drop mortgage insurance: for example, refinancing out of an FHA loan once you have 20% equity.
- Access equity: covered in cash-out refinance explained.
Step 2: Run the break-even math
Example: three years ago you borrowed $300,000 for 30 years at 7.25%. Your payment is $2,046.53 and your balance is now $290,620.03. You are offered 6.25%, with closing costs of 3% ($8,718.60).
| Option | Monthly P&I | Monthly savings | Break-even | Remaining interest + closing costs |
|---|---|---|---|---|
| Keep current loan (27 years left) | $2,046.53 | – | – | $372,455 |
| Refinance: new 30-year at 6.25% | $1,789.40 | $257.13 | 34 months | $362,282 |
| Refinance: new 27-year at 6.25% | $1,859.04 | $187.48 | 47 months | $320,429 |
The new 30-year loan has the lowest payment, but because it adds three years, it only saves about $10,173 overall. Keeping the original payoff date with a 27-year term (or making the same payment on a 30-year loan) saves about $52,026. Always compare total cost over the time you will keep the loan, not just the payment.
A 15-year refinance at an example rate of 5.75% would cost $2,413.34 a month, but total interest would drop to about $143,781.
Step 3: Check your credit and equity
Better credit scores and more equity get better pricing. Many lenders look for at least 20% equity to avoid mortgage insurance on a conventional refinance. Paying down credit card balances before applying can help.
Step 4: Get multiple Loan Estimates
Ask at least three lenders, including your current servicer, for Loan Estimates on the same day. Compare the rate, points, lender fees and cash to close. Mortgage credit checks within a 45-day window count as a single inquiry for your credit score. Learn more in mortgage points explained.
Step 5: Lock your rate and apply
Once you choose a lender, lock the rate for long enough to close, often 30 to 60 days. Provide documents quickly: pay stubs, W-2s or tax returns, bank statements, your current mortgage statement and homeowners insurance details.
Step 6: Appraisal and underwriting
Most refinances require an appraisal to confirm the home’s value. Underwriting reviews your income, assets and credit. Avoid new debt and large unexplained deposits during this time.
Step 7: Review the Closing Disclosure and close
You receive a Closing Disclosure at least three business days before closing. Compare it with your Loan Estimate. For many refinances of a primary residence, federal law also gives you a three-business-day right to cancel after signing. Keep paying your old loan until the servicer confirms it has been paid off. Review what fees to expect in mortgage closing costs explained.
When not to refinance
- You plan to sell before reaching the break-even point.
- The savings come only from stretching the term, and you would pay more interest overall.
- Your current loan already has a low rate and you only need to lower the payment after a windfall; a recast may be cheaper.
Check payments for any rate and term in our mortgage calculator.
Frequently asked questions
When is it worth refinancing a mortgage?
When the savings outweigh the costs within the time you expect to keep the loan. Divide your closing costs by your monthly savings to find the break-even point, then compare total interest, not just the monthly payment.
How much does it cost to refinance?
Refinance closing costs are similar to purchase closing costs, often around 2% to 5% of the loan amount. Some lenders let you roll them into the new loan or offset them with lender credits in exchange for a higher rate.
Does refinancing restart my mortgage?
Yes. A new 30-year loan starts a new 30-year schedule. You can avoid adding years by choosing a shorter term or by continuing to pay your old payment amount on the new loan.
How long does a refinance take?
Many refinances close in roughly 30 to 45 days, depending on the lender, the appraisal and how quickly you provide documents.
Sources: CFPB: Buying a House; CFPB: mortgage credit checks. Example calculations by ToolStackIA.
This article is for educational purposes only and is not financial advice. Loan programs, rates and rules change; confirm details with your lender or a HUD-approved housing counselor.