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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteFor a U.S. mortgage, compare fixed-rate and adjustable-rate offers for the same loan amount, term, and structure. A fixed-rate loan keeps its interest rate and scheduled principal-and-interest payment stable; an adjustable-rate mortgage (ARM) may begin with a lower rate that changes later under the terms in the note. Consider an ARM only if you understand its adjustment limits and could afford its maximum permitted payment without relying on a future sale or refinance.
This framework is specific to U.S. mortgages. Variable-rate personal, student, auto, and business loans—and mortgage products in other countries—can have different terms and disclosures.
How fixed-rate and adjustable-rate mortgages differ
A fixed-rate mortgage keeps the interest rate and scheduled principal-and-interest payment the same for the loan term. That does not freeze every housing expense: property taxes, homeowners insurance, and mortgage insurance can change, affecting the total amount due each month. The CFPB’s mortgage comparison guidance explains the distinction.
An ARM commonly has an initial period during which its rate is fixed, followed by adjustments on a schedule. The loan note specifies how adjustments work, including the index, the lender’s margin, adjustment dates, and caps. Those terms determine how the rate can change; do not assume that a market-rate decline will lower the loan rate or payment in the same way a rate increase could raise them.
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| What to compare | Fixed-rate mortgage | Adjustable-rate mortgage (ARM) | What to check |
|---|---|---|---|
| Rate behavior | Set for the loan term | Often fixed initially, then adjusted under the note | Initial period, index, margin, and adjustment dates |
| Payment predictability | Scheduled principal and interest stay the same | Payment can rise or fall after adjustments | First adjustment date and later adjustment frequency |
| Initial rate | May be higher than an ARM’s introductory rate | May start lower, but can change later | Compare offers issued around the same time with equivalent terms |
| Rate and payment exposure | Less principal-and-interest rate risk; other housing costs can still change | Caps constrain changes, but the payment may still become unaffordable | Initial, periodic, and lifetime caps, plus maximum permitted payment |
| Cost comparison | Consider interest and fees over the expected holding period and full term | Projected cost depends on assumptions about future rates | Review APR and the Loan Estimate’s five-year comparison, noting its assumptions |
| Exit flexibility | Early payoff or refinancing can still involve fees or eligibility requirements | A planned sale or refinance may be difficult or unavailable | Prepayment terms and whether the loan remains affordable if you cannot exit as planned |
How to compare U.S. mortgage offers
Request Loan Estimates from at least three lenders, as the CFPB recommends. Use the same loan amount, product, and term for each request so the offers are meaningfully comparable. Mortgage rates can change daily, so note when each estimate was issued.
- Compare the rate and scheduled payment. Look at the note rate and monthly principal-and-interest payment. For an ARM, identify when the first adjustment can happen, how frequently later adjustments can occur, and which caps apply.
- Compare points, fees, and APR. The annual percentage rate (APR) reflects the interest rate plus certain charges, such as points and broker fees. But APR does not show an ARM’s maximum rate. As the CFPB puts it, “For adjustable rate mortgage loans, the APR does not reflect the maximum interest rate of the loan.” See its guidance on interest rates and APR. APR calculations can also include different charges for a closed-end loan and a home-equity line of credit, so compare actual terms and payments rather than selecting by APR alone.
- Read the five-year cost comparison carefully. On the Loan Estimate, subtract the principal paid from the amount paid, including principal, to estimate interest and fees over five years. The CFPB’s five-year borrowing-cost explanation notes that the ARM estimate assumes rates stay unchanged. It is a comparison aid, not a worst-case projection; actual ARM costs could be higher if rates rise.
- Check contract features beyond the rate. Review the term, down-payment assumptions, total monthly payment, points and fees, prepayment penalty, balloon payment, negative amortization, and any interest-only period. These features can materially change the cost or risk. If you do not understand a feature, ask the lender for an alternative Loan Estimate without it. The CFPB’s offer-comparison checklist covers these items.
- Stress-test the ARM. Use the note’s caps and adjustment rules to determine the highest rate and payment permitted under the contract. Ask whether that payment would fit your budget on your current income. The CFPB’s fixed-rate and ARM comparison guidance cautions borrowers to consider whether they can manage the payment if the rate rises.
How to decide which type fits your situation
A fixed-rate mortgage may fit when predictability matters
Lean toward a fixed rate if stable principal-and-interest payments are central to your household budget or you expect to keep the home and loan for a long time. It reduces the risk that an interest-rate adjustment will raise the scheduled payment, though taxes, insurance, and other housing costs can still change.
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- SPEAKS YOUR LANGUAGE: Keys clearly labeled in residential mortgage finance terms like Loan AMT, Int, Term, PMT. This industry-standard calculator is super easy to use on all realty financing matters from finding a loan that works for your client to considering trust deeds investments, or finding remaining balances or balloon payments and much more
- CONFIDENTLY AND EASILY SOLVES: All your clients' financial questions whether they are buyers, sellers, investors or renters. Increase your perceived professionalism as a new agent, experienced broker or seasoned loan officer. Close more home sales and impress your clients with fast, accurate answers to all their real estate finance questions
- DEDICATED BUYER QUALIFYING KEYS: Enter client's income, debt and expenses to pre-qualify them to only show properties they can afford. Include tax, insurance and mortgage insurance then compare loan options and payment solutions to give your client choices before they make an offer to buy
- FIGURE OUT THE RIGHT LOAN: At the press of a button for jumbo, conventional, FHA/VA, or even 80:10:10 or 80:15:5 combo loans; check to see if ARMs or bi-weekly loans, quarterly payments or if interest-only payments are the answer; giving your client more choices; easily perform what if loan or tvm calculations Find loan amount, term, interest or PITI or PI payments
- BECOME AN INVALUABLE RESOURCE: Reduce your clients' confusion and uncertainty; ensuring they are able to make a purchase offer; knowing they can afford the down payment; and determining which is the right loan for them. Date-math for listings and contracts too. Comes with a protective slide cover, quick reference guide, pocket User's Guide, and long-life batteries
An ARM may fit only if the higher-payment scenario works
An ARM is worth considering when you understand its index, margin, adjustment schedule, and caps; can afford the maximum permitted payment; and find the initial-rate savings worthwhile without assuming you will sell or refinance before an adjustment. A future refinance depends on circumstances and eligibility you cannot guarantee, so do not treat it as an exit plan that makes an otherwise unaffordable payment acceptable.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the historical preference figures do—and do not—show
The CFPB’s mortgage-options page presents fixed-rate mortgages as chosen by 85–95% of buyers during 2008–2022 and adjustable-rate mortgages as chosen by 5–15% over the same period. The page also separately labels historical shares of 70–75% fixed and 25–30% adjustable. These are historical ranges as presented by the CFPB, not current market shares, and they do not establish why borrowers chose one type over the other. They are not a substitute for comparing the offers available to you.
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- SPEAKS YOUR LANGUAGE: Keys clearly labeled in residential mortgage finance terms like Loan Amt, Int, Term, Pmt; this industry-standard calculator is super easy to use on all realty financing matters from finding a loan that works for your client to considering trust deeds investments, or finding remaining balances or balloon payments and more
- CONFIDENTLY AND EASILY SOLVE: Clients' financial questions whether they're buyers, sellers, investors or renters. Increase your perceived professionalism as a new agent, experienced broker or seasoned loan officer. Close more home sales and impress your clients with fast, accurate answers to all their real estate finance questions from PITI Payments to IRR, NPV and Cashflows
- DEDICATED BUYER QUALIFYING KEYS: Enter client's income, debt and expenses to pre-qualify them to only show properties they can afford. Include tax, insurance and mortgage insurance then compare loan options and payment solutions to give your client choices before they make an offer to buy
- FIGURE OUT THE RIGHT LOAN: For your client at the press of a button for jumbo, conventional, FHA/VA, or even 80:10:10 or 80:15:5 combo loans; check to see if ARMs or bi-weekly loans, quarterly payments or if interest-only payments are the answer; giving your client more choices; easily perform what if loan or TVM calculations find loan amount, term, interest or PITI or PI payments
- BECOME AN INVALUABLE RESOURCE: To your clients by reducing their confusion and uncertainty; ensuring they are able to make a purchase offer; knowing they can afford the down payment; and determining which is the right loan for them. Date-math for listings and contracts too. Comes with a protective slide cover, quick reference guide, pocket user's guide, and long-life battery
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- DEDICATED FUNCTION KEYS for Quick Financial Solutions: Clearly labeled function keys enable you to quickly and confidently provide financial answers and options for your clients, whether in the office, in the car or at an open house. Compare loan options and provide payment solutions to give your client choices
- INSTANT FINANCIAL PROBLEM SOLVING: Solve the financial questions your clients have whether they are buyers, investors or renters; increase your perceived professionalism and close more home sales by quickly answering real estate finance problems including remaining balances
- RESIDENTIAL REAL ESTATE FINANCE TERMS: Keys labeled in residential real estate finance terms like Loan AMT, Int, Term, PMT; Calculator is super easy to use to determine a mortgage loan that works for your client
- VERSATILE LOAN CALCULATION OPTIONS: Calculate 80:10:10 or 80:15:5 combo loans at the press of a button; check to see if ARMs or bi-weekly loans, quarterly payments or if interest-only payments are the answer; giving your client more choices
- COMES COMPLETE: Comes with a protective slide cover, quick reference guide, pocket user's guide, two long-life batteries, and 1-year warranty
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