How to compare loan offers

By David Chen · Published September 20, 2026

Almost every borrower compares loan offers the same way: they look at the interest rate. It is the number that gets advertised, the number lenders lead with on the phone, and the number that feels like the answer. It is also an incomplete answer — and on a long loan, the incompleteness is worth tens of thousands of dollars.

This guide sets out a comparison method that takes about twenty minutes per lender, uses only documents you are legally entitled to, and produces one number you can rank offers by.

Start with why the headline rate is not the comparison

Two lenders can quote you the same 6.5% and hand you loans that cost materially different amounts. The rate governs interest on the balance; it says nothing about the fees wrapped around it, and nothing about how much of the loan you will actually pay before you sell or refinance.

Consider a $300,000 loan over 30 years. Walking the rate down half a percentage point at a time produces this:

Moving from 6.50% to 6.25% saves $49.05 a month and $17,659 in total interest. That is a real saving — but notice what it does not tell you. It does not tell you whether the 6.25% offer charges $4,000 more in fees, and it does not tell you whether you will still hold this loan in fifteen years. Both of those facts can reverse the ranking entirely.

Step 1 — Force the offers onto the same footing

Rate comparisons are meaningless across different loan shapes. Before comparing anything, check that every offer covers:

• The same amount. If one lender is quoting a loan amount that includes closing costs rolled in, you are comparing a larger loan against a smaller one.
• The same term. A 30-year and a 20-year loan are not competing offers; the 20-year will always look expensive monthly and cheap in total.
• The same rate type. A fixed rate and an adjustable rate are different products. An adjustable-rate loan typically opens lower than any fixed offer you will receive — that is not a bargain, it is a different risk profile.
• The same items included. Ask explicitly whether a quote is principal and interest only, or whether it includes escrow for taxes and insurance. Lenders switch between the two constantly because the escrow-inclusive figure looks alarming and the P&I figure looks attractive.

Any lender who resists normalising to these four dimensions is either disorganised or hoping the ambiguity works in their favour. Either way, that is useful information.

Step 2 — Rank on three numbers, not one

Once the offers are comparable, three figures settle most decisions:

• Monthly payment — what it does to your budget. This is the constraint that most borrowers cannot move.
• Total interest over the full term — what the loan costs if you keep it to the end. Our loan calculator returns this alongside the payment, and our amortization guide explains how the figure accumulates.
• APR — the interest rate plus most lender fees, expressed as a single yearly rate. This is the number that lets you rank loans of equal term when fees differ, and it is why APR and the interest rate diverge. A fuller treatment is in that guide; for now, the working rule is that a lower APR is better when you intend to keep the loan long enough for the fees to be absorbed.

A lender with the lowest rate but the highest APR is telling you something specific: the rate is subsidised by fees they have moved elsewhere. That can still be the right loan — but only if you know which one you are buying.

Step 3 — Do the break-even maths on any discount points

Discount points are an up-front fee paid to lower your rate permanently. One point usually costs 1% of the loan amount and buys roughly a quarter of a percentage point off the rate, though the exact exchange is set by the market and changes weekly.

The question is never “is a lower rate better” — it obviously is. The question is whether you will hold the loan long enough to earn the fee back:

Break-even months = points paid ÷ monthly payment saving

Here is that calculation for a $250,000 30-year loan, where paying points lowers the rate from 6.50% to 6.25% — a saving of $40.88 per month ($1,580.17 falls to $1,539.29):

Read the middle row carefully. Paying a full point on this loan takes 5.1 years just to get your money back. If you sell, refinance or move before then, you have handed the lender $2,500 and received nothing for it — the rate reduction only pays while the loan exists.

Step 4 — Answer the only question that settles it

Every comparison above collapses into one honest question: how long will you actually keep this loan?

Most borrowers know this answer better than they think they do. If you bought a starter home and expect to move when your family grows, you are not a 30-year-and-hold borrower, and paying points is an expensive way to discover that.

What lenders will and will not tell you

In the United States, once you submit a full application for a mortgage, the lender must send you a Loan Estimate within three business days. Page 3 has a section headed “Comparisons” that shows the APR, the total interest percentage, and the total you would pay in the first five years — which is precisely the comparison this guide describes, done for you.

Three questions worth asking every lender

• “What is the APR on this quote?” If the answer comes back as the interest rate, you have learned that this lender either does not know the distinction or prefers you not to.
• “What is the total cash I need at closing?” This surfaces fees that were quietly absent from the headline rate.
• “Is there any prepayment penalty?” A penalty is a direct tax on the option to refinance later, which is exactly the option you are relying on if you take a long term.

A comparison checklist

Collect these ten items from each lender and lay them out side by side. Offers that cannot supply them are not offers yet.

1. Same loan amount, same term, same rate type (fixed vs adjustable)
2. The interest rate, unambiguously stated as a percentage
3. The APR, as disclosed on page 3 of the Loan Estimate
4. Total discount points and origination fee, in dollars — not as a percentage
5. Every other lender fee, itemised
6. Whether the quote includes escrow (taxes and insurance) or is principal & interest only
7. The lock period, and whether an extension costs money
8. Prepayment penalty — yes or no, and for how long
9. Whether there is a lender credit, and what rate you pay for it
10. The total cash you need at closing

Where borrowers most often go wrong

• Comparing monthly payment across different terms. A 30-year loan will beat a 15-year loan on payment every single time, by construction. That is not a better deal, it is a longer one.
• Ignoring the cash at closing. A loan that saves $40 a month but costs $6,000 up front is a fifteen-year break-even. Count the cash, then decide.
• Paying points on a loan you will not keep. The single most common expensive mistake in this category.
• Letting a lender set the term. Sales pressure tends toward the longest term available because it produces the lowest payment and the highest commission. Choose the term deliberately, then compare lenders within it — as the amortization maths makes plain, term choice moves total interest far more than rate shopping within a term does.

Run your own numbers before the conversation. Enter each offer into the loan calculator and record the monthly payment and total interest side by side; the discipline of typing the figures in yourself catches more bad offers than any advice column.

Frequently asked questions

This guide is educational and is not financial advice. Figures were produced by our calculator and independently recomputed before publication; your lender's own documents govern your loan. Spot an error? Tell us — see also our disclaimer.