This calculator estimates the monthly payment and total interest on a fixed-rate loan from the amount borrowed, APR, and term; it does not calculate refinance closing costs. Enter the loan amount, annual percentage rate, and term to see those payment figures, then use the cost guide below to identify the lender’s actual refinance fees and compare them with potential savings.
Formula
The fixed monthly payment uses the standard amortizing-loan formula: Payment = P × r / [1 − (1 + r)−n]. Here, P is the amount borrowed in dollars, r is the monthly interest rate as a decimal (APR ÷ 1,200), and n is the number of monthly payments (years × 12). Total interest in this calculator is the rounded monthly payment multiplied by the number of payments, minus the original principal.
The calculator’s example defaults are for a generic $20,000 loan, not a mortgage refinance quote. It illustrates payment arithmetic only: refinance costs vary by loan, property, lender, and location, and must be obtained from an actual loan estimate or fee worksheet. The APR entered here is treated as the fixed annual rate for the payment calculation.
Worked Example
Using the defaults, P = $20,000, APR = 8%, and term = 5 years:
- Monthly rate: r = 8 ÷ 1,200 = 0.0066667.
- Number of payments: n = 5 × 12 = 60.
- Payment = 20,000 × 0.0066667 ÷ [1 − (1.0066667)−60] = $405.53 per month, rounded to cents.
- Total interest = ($405.53 × 60) − $20,000 = $4,331.80.
These results describe the sample loan, not the cash needed to refinance a home. The calculator’s formula does not add closing costs to the loan balance or include them in the payment.
Assumptions
- The interest rate stays fixed throughout the loan term.
- Payments are equal monthly payments, made at the end of each monthly period.
- Interest compounds monthly at APR divided by 12.
- Fees, taxes, insurance, mortgage insurance, escrow, and other charges are not included.
What a Mortgage Refinance Typically Costs
There is no single reliable price for every refinance. The total depends on the property and loan, the services required, and the fees charged in the specific transaction. A useful estimate is the sum of lender charges, third-party services, and any prepaid items or escrow funding shown in the lender’s written disclosure. Ask for an itemized estimate rather than relying on a percentage or a headline “no-cost” offer.
Common line items may include:
- Application, origination, or underwriting charges: lender fees for processing or evaluating the application. Names and whether charges apply differ by lender.
- Appraisal and property services: a valuation or other property-related work, if required for the transaction.
- Title and settlement services: title search, title insurance, settlement, or recording-related services, depending on local practice and the loan.
- Credit, flood, recording, or other administrative charges: third-party or public-record costs that may appear as separate items.
- Prepaid amounts and escrow deposits: money collected for items such as prepaid interest or future property-related bills. These can increase the amount due at closing but are not all lender fees.
Some existing escrow funds may be returned after the old loan is paid off, but timing and handling depend on the account and transaction. Do not assume that an escrow deposit is a permanent cost or that a refund will arrive immediately; ask the servicer and closing contact how it will be handled.
How to Estimate the Cost and Break-Even Point
First separate actual transaction charges from prepaid items, escrow funding, and any amount used to pay off the existing mortgage. Then identify which costs are paid upfront and which are added to the new loan. Financing a fee reduces cash due at closing but increases the new balance and can add interest over time.
For a simple break-even estimate, divide eligible upfront refinance costs by the estimated monthly reduction in payments. For example, if a written estimate shows $4,000 of costs and the new payment is $100 lower each month, the simple break-even period is 40 months ($4,000 ÷ $100). This is only a screening calculation. It does not account for differences in loan balance, loan term, future sale or payoff, tax treatment, or the cost of extending repayment. Compare the remaining balance and total interest over the time you expect to keep the loan, not just the monthly payment.
A lower payment alone does not prove a refinance is cheaper overall. It may result from restarting a longer repayment term, paying costs over time, or changing the loan balance. Compare offers using the same assumptions: amount financed, rate, term, costs, and expected time before selling or refinancing again.
What Changes the Final Amount
Cost estimates can change after the lender checks the application and property details. The valuation method, title work, recording charges, loan structure, and timing may affect the final figures. A rate choice may also interact with lender credits or charges, so compare the full written terms rather than treating a fee in isolation.
Review the disclosure for the amount due at closing, the new principal balance, the interest rate and APR, the payment, and the term. Check whether a quoted “credit” reduces fees in exchange for another loan term or pricing choice. Ask which charges can change, which are estimates, and whether a service can be selected or shopped for. The lender’s final closing documents—not a generic online average—show the transaction’s exact amounts.
Common Misunderstandings and Alternatives
“No-cost refinance” usually does not mean every transaction expense disappears. Costs might be offset by a lender credit or reflected in loan pricing, or certain charges might be rolled into the balance. Ask for the breakdown and compare the total payment and loan balance against an option where costs are paid upfront.
Also distinguish the new mortgage’s closing costs from the amount needed to pay off the current mortgage. A payoff amount can include principal and accrued interest through a specified date, and it is not itself a refinance fee. If the aim is changing a payment or accessing equity, compare the refinance with alternatives such as keeping the existing mortgage or exploring a separate borrowing option; each has its own costs and terms. This is general arithmetic, not a recommendation.
Frequently Asked Questions
How much does it cost to refinance a mortgage?
There is no universal amount. Add the specific lender, service, recording, prepaid, and escrow figures in the written estimate, while distinguishing charges from money held or paid on the borrower’s behalf.
Can refinance closing costs be added to the loan?
Some costs may be financed if the transaction terms allow it. That increases the new principal and can increase interest paid; compare it with paying eligible costs at closing.
Does a no-closing-cost refinance have no fees?
Not necessarily. A credit or loan pricing may offset some charges, or costs may be included in the balance. Check the itemized estimate to see what is paid, credited, or financed.
How do I calculate refinance break-even?
For a rough estimate, divide eligible upfront costs by the expected monthly payment reduction. The result is months to break even under that simplified comparison; it does not account for term, balance, or future payoff differences.
Are escrow deposits refinance costs?
They are cash collected for an escrow account, not necessarily a fee retained by the lender. Ask how any old escrow balance will be handled and when any refund may be issued.
The calculator is an estimate of loan payment arithmetic; the lender’s disclosure gives the exact figures for a refinance.
Related
Formula used
in p | Loan amount | $ | 20000 | 1 | 100000000 in apr | Interest rate (APR) | % | 8 | 0.01 | 100 in yrs | Loan term | years | 5 | 0.0833 | 50 out pmt | Monthly payment | $ | p * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)) | 2 out int | Total interest | $ | pmt * yrs * 12 - p | 2
Each line is one input (in, sel, list) or one result (out: label, unit, formula, decimals). How the calculators work
Method: the standard loan formula for this calculation, fixed rate and monthly compounding unless stated, rounded as each result states. Not financial advice; no lender, rate or product is recommended. See formulas and assumptions, the disclaimer or report an error.
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