Do these calculators tell me what a lender will approve?
No. They are planning estimates. A lender can use different income, debt, credit, reserve, property and underwriting rules.
Home & mortgage tools
Mortgage calculators for the decisions around buying, owning and refinancing a home.
A mortgage payment is only one part of a housing decision. Use the tools below to test payment, cash needed, affordability, lender quotes, discount points, seller credits, rent-versus-buy trade-offs, refinancing and the effect of paying principal faster.
Run the numbers
Mortgage Payment Calculator
Model a mortgage payment, add principal prepayments, and compare two lender quotes side by side including discount points, seller credits, cash to close, break-even timing, and financing cost over your expected holding period.
Run calculatorHome Affordability Calculator
Estimate a home-price range based on income, debts, down payment, mortgage rate, property taxes, insurance, HOA dues, and the DTI scenario you select.
Run calculatorClosing Cost Estimator
Estimate buyer closing costs and total cash needed at closing using transparent, editable planning assumptions.
Run calculatorRent vs Buy Calculator
Compare renting vs buying through decision-linked wealth, including equity, appreciation, maintenance, transaction costs, and invested cash.
Run calculatorRefinance Calculator
Compare your current mortgage with a refinance scenario, including monthly payment, break-even timing, and modeled lifetime interest.
Run calculatorMortgage Prepayment Calculator
See how extra monthly payments or a lump sum could reduce modeled interest and shorten your mortgage payoff timeline.
Run calculatorHome financing guides
Know which mortgage decision you are actually making.
Refinancing, buying points, borrowing against equity and paying principal faster can all change the cost of a home loan in different ways.
LearnMortgage Closing Costs Explained
Down payment, loan costs, prepaids, credits and cash to close
Read guide LearnFixed vs Adjustable-Rate MortgageInitial payment, reset risk, index, margin and caps
Read guide LearnPrivate Mortgage Insurance (PMI)Cost, loan-to-value and cancellation milestones
Read guide LearnMortgage Points vs Lower RateTrade upfront cash for rate savings and calculate break-even
Read guide LearnWhen Does Refinancing Make Sense?Break-even time, closing costs, rate and remaining term
Read guide LearnHELOC vs Cash-Out RefinanceCompare two ways to borrow against home equity
Read guide LearnExtra Mortgage Payments vs InvestingInterest saved, market uncertainty, liquidity and time horizon
Read guide Questions these tools answer
What could the monthly payment look like after taxes, insurance, HOA dues and estimated PMI?
Which lender quote is actually better after points, seller credits, cash to close and how long I expect to keep the loan?
How much cash might I need at closing, not just for the down payment?
Does a refinance recover its closing costs quickly enough under the assumptions I enter?
How does renting compare with buying after equity, maintenance, transaction costs and invested cash are modeled?
A better sequence
Use the tools as one decision, not six isolated calculators.
- 1
Start with affordability to set a price range from income, debts and the DTI scenario you choose.
- 2
Put real lender quotes into the Mortgage Decision Lab using the same home price and loan type. Enter each quote's rate, points, seller credit and fees instead of comparing rate alone.
- 3
Use the holding-period break-even to judge whether paying points is likely to recover its extra upfront cost before you sell or refinance.
- 4
Use rent vs buy, refinance or prepayment only after the baseline is consistent, so you are comparing the same decision rather than unrelated defaults.
FAQ
What to know before relying on the output.
Does the mortgage calculator include more than principal and interest?
Yes. You can model property taxes, homeowners insurance, HOA dues and estimated PMI, then compare two mortgage quotes with points, seller credits, modeled cash to close, prepayment and break-even timing.
Should I use today's national mortgage rate as my exact rate?
No. National averages are context. Your quote can differ based on credit, points, loan type, property, term and lender pricing.
Keep going
MFA tools are educational estimates, not financial, investment, tax, legal, insurance, lending or underwriting advice. Inputs, rules, rates and personal circumstances can change the result. Review the source and methodology notes on the relevant tool.