Start with your debt-to-income ratio, not just the sale price

Lenders decide whether you can afford a house by looking at your debt-to-income ratio — the percentage of your gross monthly income that goes toward debt payments. Most lenders want this number to be 43% or lower, though some programs for lower-income buyers allow up to 50%. This matters more than the house price itself, because two people earning the same income can afford very different homes depending on their car loans, credit cards, and student debt.

To calculate yours, add up all your monthly debt payments: car loans, credit cards (use the minimum payment, not the balance), student loans, child support, and any other regular obligations. Divide that total by your gross monthly income — the amount before taxes. If you earn $3,000 per month and owe $1,200 in debt payments, your ratio is 40%. A lender will then add an estimated mortgage payment to that $1,200 to see if the total stays under their limit.

This is why paying down debt before you buy can make a real difference. Eliminating a $300 car payment or $200 in credit card minimums directly increases the mortgage payment a lender will approve. It costs nothing and takes no time to calculate, so do this first before you look at houses.

Key Takeaways

  • Your debt-to-income ratio — the percentage of your income that goes to debt — determines how much house you can afford more than your savings or the sale price does.
  • Most lenders cap this ratio at 43%, though programs for lower-income buyers sometimes allow 50%, and paying down existing debt before applying can raise your approval amount.
  • Down payment assistance and low-down-payment loans exist for people with limited savings, but you still need to prove stable income and a reasonable credit history.
  • Property taxes, insurance, and maintenance costs can equal 25% to 40% of your total housing payment, so budget for these when deciding what you can afford.
  • Getting pre-approved by a lender before house hunting shows you a real number, not an estimate, and prevents you from falling in love with a house you cannot actually buy.

Understand what "affordable" actually includes beyond the mortgage

The mortgage payment is only part of what homeownership costs. When lenders calculate whether you can afford a house, they include property taxes, homeowners insurance, and mortgage insurance (if your down payment is less than 20%). Together, these are called PITI — principal, interest, taxes, and insurance. On a $200,000 house in many areas, the mortgage payment might be $1,200, but PITI could be $1,500 or more depending on your location and down payment size.

Beyond PITI, you also pay for maintenance and repairs. Most experts suggest budgeting 1% of the home's purchase price per year for upkeep — so a $150,000 house would need $1,500 set aside annually for things like roof repairs, water heater replacement, or foundation work. This is not optional; it is the cost of owning rather than renting. If your budget does not have room for this, you cannot actually afford the house, even if a lender approves you.

Add utilities, which vary by region and season but typically run $100 to $300 per month. In older homes or cold climates, heating costs can spike. Ask the current owner or neighbors what they actually pay, not what the utility company estimates. This real number belongs in your affordability calculation.

Know the down payment and credit requirements for lower-income programs

You do not need 20% down to buy a house. Federal Housing Administration (FHA) loans allow down payments as low as 3.5%, and some state and local programs go lower or offer down payment assistance that covers part or all of it. The catch: lower down payments mean higher monthly payments because you are borrowing more and paying mortgage insurance on top of the loan itself.

FHA loans require a credit score of at least 580 to may have access to for the 3.5% down option; scores between 500 and 579 may may have access to with 10% down. If your score is below 500, you will need to work on it before applying — paying down debt and fixing errors on your credit report are the fastest routes. Many lenders also look at your payment history over the last two years, so recent late payments matter more than old ones.

Down payment assistance programs run by state housing finance agencies, nonprofits, and local governments vary widely. Some are forgivable loans (you do not repay them if you stay in the house for a set period), some are grants (assistance programs), and some are low-interest loans. Your mortgage lender can often tell you which programs you might reach, or you can search your state housing finance agency's website directly. These programs often have income limits — usually 80% to 120% of your area's median income — so confirm you fall within the range before spending time on the application.

Get pre-approved to see your real number, not an estimate

Pre-approval is different from pre-qualification. A pre-qualification is an estimate based on information you provide over the phone or online; a pre-approval is a lender's written commitment based on verified income, assets, and credit. Pre-approval takes a few days and requires recent pay stubs, tax returns, bank statements, and a credit check. It is worth doing before you start house hunting because it shows you the actual amount a lender will approve, not a guess.

Pre-approval also protects you from falling in love with a house you cannot afford. Many lower-income buyers find a home they want, make an offer, and then discover during the mortgage process that they do not actually may have access to. By then, they have paid for an inspection, appraisal, and other costs. Pre-approval prevents this by forcing the hard conversation with a lender first, when it costs nothing.

When you get pre-approved, ask the lender to explain what happens if your income changes, if you take on new debt, or if the house appraises for less than the sale price. These are real risks that can kill a deal, and understanding them in advance means you are not blindsided later.

Calculate your true monthly housing budget step by step

Take your gross monthly income and multiply it by 0.43 (or 0.50 if you are using a lower-income program). This is the maximum total debt payment a lender will allow. Subtract your existing debt payments from this number. What remains is the maximum housing payment the lender will approve.

Now subtract property taxes, insurance, and mortgage insurance from that number. What is left is your maximum principal and interest payment — the actual mortgage. Use an online mortgage calculator to see what loan amount that payment represents at current interest rates. That loan amount, minus your down payment, is the maximum house price you can afford.

Example: You earn $3,500 gross per month. Your maximum debt is 43% of $3,500, or $1,505. You have a $200 car payment and $100 in credit card minimums, leaving $1,205 for housing. Property taxes, insurance, and mortgage insurance on a $150,000 house in your area total $350. That leaves $855 for principal and interest. At a 7% interest rate, that payment supports a loan of roughly $120,000. With a 3.5% down payment, you can afford a house around $124,000.

This math is not exact — interest rates change, property taxes vary by location, and insurance depends on the specific house — but it gives you a realistic range before you talk to a lender. If the number feels too low, the answer is to pay down debt or save for a larger down payment, not to stretch your budget.

Explore first-time buyer programs specific to your state or city

Most states and many cities run first-time homebuyer programs that combine down payment assistance, favorable loan terms, or both. These programs often have income limits that favor lower-income buyers and may offer rates slightly below market rate. Examples include state housing finance agency programs, community development financial institutions (CDFIs), and nonprofit lenders. The terms and income limits vary by location and change year to year.

To find programs in your area, start with your state housing finance agency — search "[your state] housing finance agency" online. Many have searchable databases of current programs. You can also contact your local housing authority or call 211 (a national referral service) to ask what down payment assistance or favorable loan programs exist where you live.

When you find a program, confirm three things: the income limit, whether you meet it, and whether the program is currently open. Many programs run out of funding and reopen later in the year. Knowing this before you spend time on an application saves frustration.

Account for the costs that come after closing

Buying a house costs money beyond the down payment and closing costs. You will need to furnish or repair the home, pay for a home inspection and appraisal during the mortgage process, and have cash on hand for emergencies. Many lenders also require you to have reserves — money left in savings after closing — to prove you can handle a financial shock. For lower-income buyers, this can be a real barrier.

Some programs waive or reduce reserve requirements, and some nonprofits offer grants specifically for closing costs or immediate repairs. Ask your lender or the program administrator what reserves they require and whether any are waived. If you are short on cash, this is a legitimate reason to delay buying until you have saved more, rather than stretching your budget to the breaking point.

Budget for at least one month of housing payments in reserves if possible, plus $1,000 to $2,000 for immediate repairs or emergencies. If you cannot save this, you are not yet ready to buy, no matter what a lender approves.

Frequently Asked Questions

What credit score do I need to get a mortgage on a lower income?

FHA loans, which are common for lower-income buyers, require a minimum credit score of 580 for a 3.5% down payment. Scores between 500 and 579 may may have access to with 10% down. If your score is below 500, focus on paying down debt and fixing errors on your credit report before applying. Recent payment history matters more than old mistakes.

Can I use down payment assistance if I already have savings?

Yes. Down payment assistance programs do not require you to be broke; they require you to meet income limits and other criteria. Having savings actually helps because it shows you can manage money. Some programs ask you to contribute a small amount of your own money alongside the assistance.

What happens if I get pre-approved but my income changes before closing?

Tell your lender immediately. A job loss or significant income drop can kill your approval. If you change jobs but your new income is similar or higher, you will need to provide a new offer letter or recent pay stubs. The lender will re-verify your income before closing, so hiding a change will only delay things or cause the deal to fall through.

Is it better to save for a bigger down payment or buy sooner with a smaller one?

This depends on your local market and interest rates. A larger down payment means lower monthly payments and no mortgage insurance, but waiting to save means you stay in a rental longer and may face rising home prices. Run the numbers: compare the cost of renting for two more years versus buying now with a smaller down payment. Often, buying sooner makes sense even with mortgage insurance, especially if home prices in your area are rising.

What if I cannot afford the house I want but can afford one nearby?

This is normal. Lower-income buyers often need to look in different neighborhoods, buy a smaller home, or consider a fixer-upper. These are not failures; they are realistic choices. A house you can actually afford and maintain is better than one that stretches your budget to the breaking point.