What this tool does
Lenders quote a rate, a fee total and sometimes points; none of those numbers alone tells you which loan is cheaper. The answer depends on how long you keep the loan. This tool takes two offers and your expected holding period, then adds up everything you actually pay in that window — interest, lender fees, points and monthly mortgage insurance — and shows which one wins and by how much. It also shows the APR of each offer and the month at which the higher-fee offer earns back its extra cost.
Three ways to use it
- Two lenders. Take the rate, term and Section A lender fees from each Loan Estimate. Leave out third-party costs (appraisal, title) that are the same whoever you choose.
- Points or no points. Put the no-points quote in A and the quote with points in B (fees = points cost). The break-even month tells you how long you must keep the loan for the points to pay off; if you may sell or refinance sooner, take A.
- Refinance or keep. Put your current loan in A with fees = 0, the term = years remaining, and the rate you have. Put the refinance quote in B. If B does not win within your holding period, do not refinance — at today's 7.4% average, most borrowers with rates under 7.75% will find exactly that. The Refinancing Guide has the full break-even table.
| $400,000, kept 7 years | Offer A: 7.40%, $2,500 fees | Offer B: 7.15%, $8,500 fees |
|---|---|---|
| Monthly P&I | $2,770 | $2,702 |
| Interest over 7 years | ≈$199,000 | ≈$192,000 |
| Total cost over 7 years | ≈$201,900 | ≈$200,900 |
| Break-even on B's extra $6,000 | about 89 months — B wins only if you keep the loan longer than that | |
What it leaves out
Property taxes, homeowners insurance and HOA dues are the same under either loan and are excluded. Cash-out amounts, financed closing costs and the tax deductibility of interest are not modeled. Mortgage insurance is assumed constant for the holding period; if you expect it to cancel earlier, lower the monthly figure. For a rate change on a loan you already hold, use the Rate Shock Calculator; for the fee-adjusted rate of a single offer, the APR Calculator.