Start by understanding what you can actually afford to borrow

Before you look at a single house, you need to know the real limit on what a lender will give you. That limit depends on three things: your income, your debts, and your down payment. Most lenders will lend you up to 28 percent of your gross monthly income for housing costs (mortgage, property tax, insurance, and homeowners association fees combined). Some will go to 43 percent of your gross income if your other debts are low.

The math is straightforward. If you earn $4,000 a month gross, a lender using the 28 percent rule will consider you for a mortgage payment of about $1,120. If you earn $6,000 a month and have no car loans or credit card debt, they might stretch to $2,580. These are the ceilings — not what you should actually spend, but what lenders will allow.

You can find out your actual number by talking to a mortgage lender or a loan officer at a credit union. They will run your credit and ask about your debts, then give you a pre-qualification or pre-approval letter that states the amount they will lend. This takes about 20 minutes and costs nothing.

Key Takeaways

  • Lenders typically cap your housing payment at 28 to 43 percent of your gross monthly income, depending on your other debts.
  • A down payment of 3 to 5 percent is possible with FHA loans or conventional loans backed by mortgage insurance, though you will pay more per month.
  • Closing costs (title, appraisal, inspection, attorney fees) usually run 2 to 5 percent of the purchase price and must be paid at signing.
  • Your credit score, debt-to-income ratio, and employment history matter as much as your down payment when a lender decides whether to lend to you.
  • Saving for a down payment while paying rent is hard; a side income or a one-time windfall (tax refund, bonus, inheritance) often makes the difference.

Understand the real cost of a low down payment

You do not need 20 percent down to buy a home. FHA loans allow 3.5 percent down, and some conventional loans allow 3 to 5 percent. But a low down payment costs you money every month for years.

When you put down less than 20 percent, the lender requires mortgage insurance — a monthly fee added to your payment that protects the lender if you stop paying. On an FHA loan, this fee is roughly 0.55 percent of the loan amount per year. On a conventional loan with 5 percent down, it is often 0.5 to 1 percent per year. That means on a $200,000 loan, you are paying $100 to $200 extra per month just for insurance.

The insurance stays on your payment until you have paid down the loan to 80 percent of the home's value (on conventional loans) or until you refinance (on FHA loans). If you put down 3 percent on a $200,000 home, you are borrowing $194,000. You will pay mortgage insurance until the loan balance drops to $160,000 — which takes years if you are on a tight budget and can only make the minimum payment.

This is not a reason to avoid a low down payment if that is your only path to buying. It is a reason to know the true monthly cost before you commit.

Account for closing costs and inspection expenses

The purchase price is not the only money that leaves your account. Closing costs — the fees charged by the lender, title company, appraiser, and attorney — usually run 2 to 5 percent of the purchase price. On a $150,000 home, that is $3,000 to $7,500 due at signing.

These costs cover the appraisal (the lender's check that the home is worth what you are paying), the title search (proof that the seller actually owns it), title insurance (protection if someone later claims ownership), loan origination fees, and attorney or closing agent fees. Some of these are negotiable; some are not. A lender can tell you the exact breakdown before you sign anything.

Before closing, you will also pay for a home inspection (typically $300 to $500), which is your chance to learn about the roof leaks, the foundation cracks, or the electrical system is dangerous. This is money well spent on a tight budget, because a major repair after you buy can sink you. If the inspection finds serious problems, you can renegotiate the price or walk away.

Check your credit score and fix obvious problems first

Your credit score determines the interest rate you will pay. A score of 620 to 639 might get you 6.5 percent; a score of 740 to 759 might get you 5.8 percent. On a $200,000 loan, that difference is roughly $140 per month for 30 years.

You can check your credit score for free through AnnualCreditReport.com (the only site required by federal law to give you a free report each year) or through your bank or credit card company, which often provide scores at no cost. Look for errors — accounts that are not yours, payments marked late when you paid on time, or balances that are wrong. Dispute errors directly with the credit bureau (Equifax, Experian, or TransUnion) by mail or through their websites.

If you have recent late payments or high credit card balances, paying those down before you apply for a mortgage will improve your score. A 30-day late payment from six months ago hurts less than one from last month. If you can wait three to six months and pay down credit cards to below 30 percent of their limits, your score will likely jump 20 to 50 points.

Decide between FHA, conventional, and state or local first-time buyer programs

FHA loans are backed by the Federal Housing Administration and allow down payments as low as 3.5 percent. They are easier to get if your credit score is below 640 or your debt-to-income ratio is high. The trade-off is that mortgage insurance stays on your loan for the full 30 years (unless you refinance later). FHA loans also have limits on how much you can borrow, which varies by county.

Conventional loans are not backed by the government. They usually require a higher credit score (often 620 or above) and a larger down payment (3 to 20 percent), but mortgage insurance drops off once you reach 80 percent equity. Interest rates are sometimes lower than FHA rates if your credit is good.

Many states and cities offer first-time buyer programs that provide down payment help, lower interest rates, or both. These programs vary widely. Some require you to live in the home, some limit the purchase price, and some are only open to buyers below a certain income. Your local housing authority or a nonprofit housing counselor can tell you what is available in your area. The National Council of State Housing Agencies (ncsha.org) has links to state programs.

Build your down payment savings while you are still renting

Saving for a down payment while paying rent is the hardest part of buying on a tight budget. You are paying someone else's mortgage while trying to save for your own.

The most realistic approach is to separate your down payment savings from your regular budget. Open a separate savings account (ideally at a different bank so you are not tempted to dip into it) and treat deposits like a bill you have to pay. Even $100 or $150 a month adds up: $150 a month for two years is $3,600, which is a 3 percent down payment on a $120,000 home.

A one-time windfall — a tax refund, a work bonus, an inheritance, or a side income — often makes the difference between saving enough and falling short. If you get a tax refund, put it directly into the down payment account instead of spending it. If you pick up seasonal work or sell things you no longer need, deposit that money too.

Some employers offer matched savings programs or down payment assistance for employees. Ask your HR department whether your workplace has one. Some credit unions also offer down payment grants (not loans) to members who have been with them for a certain length of time.

Get a pre-approval letter before you start house hunting

A pre-approval letter from a lender tells you the maximum amount they will lend and at what interest rate. It is not a may provide — the lender will still verify your employment and run your credit again before closing — but it is a solid signal that you can borrow.

To get pre-approved, contact a mortgage lender, bank, or credit union. You will need to provide recent pay stubs, tax returns from the last two years, bank statements showing your down payment savings, and permission to pull your credit report. The process takes a few days to a week.

A pre-approval letter is useful for two reasons. First, it tells you the real number to use when you are looking at homes — do not waste time on houses above your pre-approval amount. Second, when you make an offer on a home, the seller is more likely to take you seriously if you have a pre-approval letter. It shows you are not just dreaming; you are ready to buy.

Frequently Asked Questions

How much should I actually save for a down payment if I am on a tight budget?

Start with 3 to 5 percent if you are using an FHA or low-down-payment conventional loan. That is the minimum most lenders will accept. If you can save 10 percent, your monthly payment will be lower and you will avoid mortgage insurance longer. The more you save, the less you pay per month for years.

What if I have bad credit or a recent late payment?

FHA loans are more forgiving than conventional loans. A credit score of 580 to 620 is possible with FHA if you have a larger down payment (5 to 10 percent) and can explain recent late payments. Wait at least six months after a late payment before applying, and use that time to pay down credit card balances and avoid new debt.

Can I use a gift from family for my down payment?

Yes, most lenders allow down payment gifts from family members. You will need a signed letter from the person giving the money stating it is a gift, not a loan, and that they do not expect repayment. The lender will verify the gift money is in your account before closing.

What happens if I cannot save enough for a down payment?

Look into state and local first-time buyer programs, which often provide down payment grants or forgivable loans. Some nonprofits also offer down payment help. Your local housing authority or a HUD-approved housing counselor can point you to programs in your area.

Should I pay off my car loan before I apply for a mortgage?

If you can pay it off without draining your down payment savings, yes — it will lower your debt-to-income ratio and improve your chances of approval. If paying it off means you cannot save for a down payment, keep the car loan and focus on saving. A lender will work with you either way.