What Is a Refinance Calculator?
A mortgage refinance calculator helps you decide whether refinancing your home loan makes financial sense. Refinancing means replacing your current mortgage with a new one, typically to get a lower interest rate, reduce your monthly payment, change your loan term, or tap into your home equity. But refinancing isn't free — closing costs typically run 2-5% of the loan amount. This calculator shows your potential savings, break-even point, and total costs so you can make an informed decision.
Why People Refinance
- Lower interest rate: The most common reason — a 1-2% rate drop can save hundreds monthly
- Lower monthly payment: Either from a lower rate or extending the loan term
- Shorter loan term: Pay off the loan faster and save on total interest
- Switch from ARM to fixed: Lock in stability before an adjustable rate increases
- Cash-out refinance: Borrow more than you owe and get the difference in cash
- Remove mortgage insurance: If you now have 20% equity, refinancing can eliminate PMI
- Change loan terms: Switch from 30-year to 15-year, or remove a co-borrower
The Break-Even Point
The most important number in a refinance decision is your break-even point — how many months it takes for your monthly savings to exceed the closing costs. If you plan to stay in the house longer than the break-even period, refinancing usually makes sense. If you'll move or sell before then, you'll lose money. Calculate it by dividing total closing costs by your monthly savings.
Refinance Example
Let's say you have a $300,000 mortgage at 7.5% with 27 years remaining, and you can refinance to 6% with $6,000 in closing costs:
- Current payment: $2,096/month
- Current balance: approximately $292,500
- New payment (6%, 30yr): $1,753/month
- Monthly savings: $343
- Closing costs: $6,000
- Break-even point: $6,000 ÷ $343 = ~17.5 months
- Total interest saved over loan life: over $120,000
If you plan to stay in the home more than about 18 months, refinancing would save you money in the long run.
Costs of Refinancing
Closing costs for refinancing typically total 2-5% of the loan amount and may include:
- Loan origination fee: 0.5-1.5% of the loan amount
- Appraisal fee: $300-$600
- Title search and insurance: $500-$1,500
- Credit report fee: $30-$100
- Attorney/closing fee: $300-$800
- Recording fee: $50-$250
- Points (discount points): Optional — buy down the rate by paying upfront
- Prepayment penalty: Rare on modern mortgages but check your current loan
When Refinancing Isn't Worth It
- You're planning to move soon: If you sell before the break-even point, you lose money.
- Rate difference is small: Less than 0.75-1% difference rarely justifies closing costs.
- Resetting the clock: Going from year 10 back to a new 30-year loan increases total interest.
- Low equity: If you have less than 20% equity, you'll pay PMI on the new loan too.
- Cash-out refi for non-essential spending: Tapping equity for vacations or cars is risky.
- Bad credit: If your credit has dropped since you got the original loan, you might not get a better rate.
Tips for a Successful Refinance
- Shop around: Get quotes from 3-5 lenders — rates and fees vary significantly.
- Improve your credit first: Even 50 points can make a big rate difference.
- Compare APR, not just rate: APR includes fees and shows the true cost.
- Consider a no-closing-cost refinance: Higher rate, but no upfront expense — good if you'll move soon.
- Lock your rate: Rates change daily — lock when you find a good one.
- Calculate the numbers: Always compare total costs over the period you plan to keep the loan.
Frequently Asked Questions
How much lower should rates be to refinance?
The old rule of thumb was 1%, but it really depends on your loan size and how long you'll stay in the home. For a large loan amount, even a 0.5% reduction can generate enough savings to justify refinancing. For smaller loans, you might need a 1%+ drop. The key metric is the break-even period, not the rate difference itself.
Does refinancing hurt your credit?
Temporarily, yes. A refinance involves a hard credit inquiry, which typically lowers your score by a few points. And opening a new account while closing an old one can also temporarily impact your score. However, the impact is usually small (5-15 points) and short-term (a few months). If you're making payments on time, your score should recover and may even improve due to a lower credit utilization ratio.
Can I refinance if I have bad credit?
It's possible but harder and more expensive. FHA and VA streamline refinances have more flexible credit requirements if you already have that type of loan. Conventional refinances generally require at least a 620 credit score. If your credit has significantly improved since your original loan, refinancing can be especially beneficial. But if your credit has dropped, you may want to work on improving it first.