Before you tour homes, choose a monthly housing payment your household can comfortably manage—not the largest loan a lender might approve. Add property taxes, homeowners insurance, mortgage insurance if applicable, HOA fees, and likely upkeep to principal and interest; then use the amount left for principal and interest to estimate a loan size. Keep cash aside for closing and other expenses, and treat the result as a working range that you refine with local estimates and lender offers.
Start with your household budget, not a lender’s maximum
A mortgage approval amount answers how much a lender may be willing to lend under its criteria. It does not tell you what payment fits your household’s day-to-day costs, savings goals, and comfort with financial risk. The Consumer Financial Protection Bureau (CFPB) advises buyers to focus on a mortgage affordable alongside their other priorities, rather than on how much they qualify for. Its affordability guidance was reviewed June 27, 2024: CFPB: Decide how much you can spend.
Review several months of bank and credit-card statements. Total recurring bills, variable and irregular spending, debt payments, and savings commitments. Then decide what amount could go toward housing without relying on gross income alone or abandoning other priorities.
Use 30% of gross income only as a rough reference
Freddie Mac says that, for a rough estimate, many lenders suggest spending no more than 30% of monthly income before taxes on a mortgage payment that includes principal, interest, property taxes, and insurance. That is a broad rule of thumb, not a universal approval threshold or a personalized answer. Your other debts, local costs, household spending, and savings plans can make a lower target more appropriate. See Freddie Mac: How Much Home Can I Afford?.
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Count the full cost of owning the home
Build a monthly target from the costs you expect to carry as an owner, not just the mortgage principal and interest.
- Principal and interest: the amount that repays the loan and pays interest.
- Property taxes and homeowners insurance: estimate these for the location and type of property you are considering; amounts can vary by home and area.
- Mortgage insurance: include it if it may apply to your loan. A smaller down payment can increase the monthly cost.
- HOA charges: include any homeowners association fees for the properties you might buy.
- Repairs and maintenance: reserve room in the budget for likely upkeep rather than assuming every housing dollar goes to the lender.
For taxes, insurance, and HOA costs, seek estimates tied to the location and property type. If an amount is still uncertain, test the budget using more than one plausible estimate instead of treating the lowest figure as certain.
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Protect your cash before setting a down payment
Savings available today are not necessarily all available for a down payment. First account for other savings goals, moving expenses, likely repairs or renovations, furnishings, and a cash reserve. The CFPB describes three to six months’ worth of expenses as a rule of thumb for an emergency cushion. It also says closing costs typically run 2% to 5% of the purchase price, though actual costs depend on factors including the home, location, loan, lender, and down payment. See CFPB: Figure out your down payment.
Estimate closing costs alongside the purchase price rather than treating them as part of the down payment. The cash left after those reserves and anticipated expenses is a more realistic starting point for estimating your down payment.
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Once you have a comfortable total monthly housing target and a realistic cash estimate, work backward to estimate a loan amount. The CFPB explains this approach in its home affordability guidance.
- Choose a total monthly housing target. Base it on your budget and include room for the ownership costs listed above.
- Estimate taxes, insurance, mortgage insurance, HOA charges, and upkeep. Use local or property-specific information where available.
- Subtract those costs from the total target. The remainder is the monthly amount available for principal and interest.
- Choose a plausible loan type, interest rate, and term. Use assumptions that fit the financing you are considering; rates and loan terms affect the loan amount supported by a given payment.
- Use a mortgage calculator to estimate the principal-and-interest loan amount for those assumptions.
- Add the down payment you can actually afford after reserving cash for closing costs and other needs. The result is a rough home-price range, not a final loan offer.
No current interest-rate figure is suitable for every buyer: rates change, and the rate available to you depends on your loan and borrower details. Replace calculator assumptions as you get more specific information.
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Stress-test the estimate before you view homes
Run the calculation again with different assumptions. A range is more useful than one precise-looking price when important costs and financing terms are not settled.
- Try higher and lower interest-rate assumptions and compare the resulting principal-and-interest payment.
- Vary the down payment and include any resulting mortgage insurance.
- Test different property-tax, homeowners-insurance, and HOA estimates for the areas you are considering.
- Allow for maintenance and repairs, and check whether the resulting payment still leaves room for other savings and expenses.
- Consider whether a future payment change under a loan’s terms would still fit your budget.
Compare scenarios by the full monthly cost and cash needed upfront, not by purchase price alone. If comparing mortgages, also look at the interest rate and points, loan term, fixed versus adjustable rate, mortgage insurance, closing costs, and APR. The CFPB outlines these comparison factors in its mortgage comparison guidance.
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Use preapproval to shop, not to set your personal budget
When you are ready to shop, preapproval can help show sellers that you are working with a lender. It is conditional, not a final approval or a recommendation about what you should spend. The CFPB explains that a preapproval letter reflects a lender’s willingness to lend pending further confirmation of details. It also does not commit you to that lender. Read CFPB: What is a preapproval letter?.
The CFPB advises requesting preapprovals from at least three lenders. Compare the Loan Estimates you receive after making an offer, including fees and loan terms—not just the headline amount offered. See CFPB: Compare Loan Estimates. If a lender is willing to lend more than your budget supports, keep your own limit.
These steps provide general U.S. budgeting guidance, not personalized financial or lending advice. Local taxes, insurance, property risks, maintenance, loan eligibility, and available assistance programs require case-specific estimates.
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