How Much House Can You Really Afford? The Complete Guide

Danny’s pre-approval letter says $260,000. His agent is excited. His mom is excited. For about ten minutes, Danny is excited too. Then he does something most buyers skip: he sits down at the kitchen table with his last pay stub and works out what he can actually live with. The answer is $165,000.

That gap is the whole story of buying a house. The bank tells you how much you can borrow. Nobody tells you how much you can afford. This guide walks you through the method Danny used, step by step, so you can answer “how much house can I afford?” with your own numbers before you fall in love with a kitchen.

The three numbers that answer “how much house can I afford?”

You need three numbers, not one. Write them at the top of a sheet of paper before you look at a single listing.

1. The target: a total monthly housing payment of about 25% of your take-home pay.
2. The red line: a total monthly housing payment that never goes above one third (about 33%) of your take-home pay.
3. The price check: a home price under about 3 times your gross yearly income.

Whichever of these gives you the lowest price wins. These are rules of thumb, not laws of nature, but they hold up well for a normal middle-class budget, because they are built around the money that actually lands in your account.

What “total payment” means

Total means everything you pay every month just to keep the house:

• Mortgage principal and interest
• Property tax
• Homeowners insurance
• Mortgage insurance (PMI), if you put less than 20% down
• HOA dues, if the property has them

Lenders call this PITI (principal, interest, taxes, insurance). Most listing sites show you a “from $1,100 a month” number that quietly leaves half of it out. Use the full number.

Why take-home pay and not gross?

Because you can’t pay a mortgage with money that went to taxes. Gross income is the big number at the top of your pay stub. Take-home is what’s left after federal and state income tax, Social Security and Medicare, and whatever comes out for your 401(k) and health insurance. For a typical middle-class paycheck, take-home is roughly 70% to 80% of gross. Open your last pay stub and look at the bottom line. That’s your number.

Why a third is the red line

If the house takes a third, you still have two thirds for everything else: food, your car, utilities, your phone, your other bills, your emergency fund, your retirement, and a little bit of life. Dinner out once in a while. A trip to see family. That’s a balance you can keep up for thirty years.

Go above a third, and something has to give. It’s almost always savings first. The emergency fund stops growing, the 401(k) contribution gets paused, and the next surprise lands on a credit card. A quarter is the target. A third is the line you don’t cross, no matter how perfect the house is.

How lenders decide what you can borrow (the 28/36 rule)

Lenders use a different yardstick: your debt-to-income ratio (DTI), measured against your gross monthly income. The classic guideline is the 28/36 rule:

• Your housing payment should be no more than 28% of gross monthly income.
• Your housing payment plus all other monthly debt payments (car loan, student loans, card minimums) should be no more than 36% of gross.

In practice, many lenders go further. Depending on the loan program and your credit, total debt payments of roughly 43% to 50% of gross income can still get approved. That’s why pre-approval letters so often come in well above anything the 28/36 rule would suggest.

Notice what the lender’s math leaves out: taxes, groceries, childcare, utilities, repairs, and every dollar you’d like to save. The bank is asking “will the check clear?” Your question is “can I still live?” Those are different questions with different answers. We go deep on that gap, including why lenders use gross income and how to ask for a smaller letter, in Pre-Approved vs. Affordable: Why the Bank’s Number Isn’t Your Number.

Danny runs his numbers: a worked example

Danny earns $64,000 a year. He has a $300 monthly car payment, $40,000 saved for the house (about $35,000 for the down payment and $5,000 for closing costs), and a separate $12,000 emergency fund. He assumes a 30-year fixed mortgage at a 7% rate, property tax of 1% of the price per year, and homeowners insurance of $1,500 a year. Your rate, taxes and insurance will differ, so treat these as example numbers.

Step 1: Start from take-home pay

Danny’s pay stub says about $4,250 a month lands in his account. That’s the only income number he uses for his own budget.

Step 2: Find the target and the red line

• Target: $4,250 × 25% = about $1,063 a month, all in.
• Red line: $4,250 ÷ 3 = about $1,418 a month, all in.

He circles the red line twice.

Step 3: Check the price against income

$64,000 × 3 = $192,000. That’s the most house he should consider, even if the payment math somehow allowed more.

Step 4: Turn payments into prices

With $35,000 down at 7%, a $1,063 total payment buys a home of about $156,000. The red-line payment of $1,418 would technically stretch to about $195,000 once PMI is included, but the price check caps him at $192,000 first. So Danny’s range is roughly $156,000 to $192,000. The lender’s letter says $260,000.

That last row is what the lender approved: a payment that is 39% of his gross income, about 45% once you add the car payment. In take-home terms, it’s almost half of everything he brings home.

Step 5: Stress-test it

Danny asks himself two questions.

If my income dropped by a fifth, would the payment still be under a third of my take-home? A 20% cut takes him to about $3,400 a month, and a third of that is about $1,134. At $192,000 the payment is $1,395. Fail. At $165,000 with $35,000 down, the payment is $1,127. Pass, barely.

If I lost my job, how many months could I keep paying? With the house, his bare-bones monthly spending would be about $3,100. His $12,000 emergency fund covers just under four months. If the honest answer had been less than three, either the house was too expensive or the emergency fund was too small.

If you’re buying with a partner, add a third question: could you make the payment on one income for six months? Lenders will happily count both paychecks. Life won’t always give you both.

Step 6: Protect the cushion and the future

After the down payment and closing costs, Danny’s emergency fund is still intact and his 401(k) contribution keeps running. If buying the house had meant emptying the emergency fund or pausing retirement savings, the house would be too expensive, no matter what the letter says.

Danny’s real number is $165,000. His payment is $1,127 a month, about 26.5% of his take-home. When his agent calls about a listing at $240,000 and says “but you’re approved for it,” Danny has his answer ready: “I’m approved for it. I can’t afford it.”

Run your own numbers. Set the comfort share to 25 for your target, then to 33 for your red line:

The calculator leaves PMI out, so if you’re putting less than 20% down, knock a little off the result (see the PMI section below). If you’d rather see what these rules work out to at common incomes, we’ve done the tables for you in How Much House Can I Afford on a $60K, $80K or $100K Salary?

The hidden costs of owning a home

“It’ll be tight, but we can make it work” might be the most expensive sentence in real estate. Tight only works if nothing goes wrong, and a house is a machine for things going wrong. Here’s what the monthly payment doesn’t show you.

Closing costs

The fees for the loan, the title, the appraisal and everything else often run about 2% to 5% of the price, on top of your down payment. On Danny’s $165,000 house, that’s roughly $3,300 to $8,250. Ask your lender for a Loan Estimate early so this number isn’t a surprise.

Moving and furnishing

A house has rooms an apartment didn’t, and empty rooms want furniture. Budget for the move and for living with a half-empty living room for a while. Financing a couch on a store card at the register is how a lot of new homeowners start their first year in the hole.

Utilities

A house usually costs more to heat, cool and power than an apartment. Water, sewer and trash that your landlord used to cover are now yours. Ask the sellers for a year of utility bills, or look up typical costs with the local utility.

Maintenance and repairs

A common rule of thumb is to budget 1% to 2% of the home’s value every year for maintenance and repairs. On $165,000, that’s $1,650 to $3,300 a year, or roughly $140 to $275 a month that never appears on your mortgage statement. And repairs don’t arrive spread over twelve months. A water heater, a roof leak and an air conditioner in August tend to show up whenever they feel like it.

Here’s a useful check: add your monthly maintenance set-aside to your housing payment. For Danny, $1,127 plus about $200 is roughly $1,330, still under his $1,418 red line. If your payment only fits under the red line before you count repairs, it doesn’t really fit.

Payments that rise after you sign

Most lenders collect property tax and insurance through an escrow account inside your mortgage payment. When your county reassesses your home or your insurer raises its rates, the escrow comes up short and your monthly payment goes up. Home insurance premiums have climbed sharply in many states in recent years. The payment you budget for in year one isn’t always the payment you make in year three, so leave room.

A quiet hero: the house account

Rosa bought a small two-bedroom house at a price that kept her payment near a quarter of her take-home. The day she moved in, she set up an automatic transfer of $200 a month into a separate savings account she named “house.” She never thinks about it.

When her water heater died one spring, it was an annoying Tuesday, not a crisis. She called a plumber and paid from the house account. A few months later she needed surgery and six weeks off work at reduced pay. Because her payment was only about a quarter of her normal take-home, she could still cover it. The roughly $2,000 shortfall came out of her emergency fund, which is exactly what it’s for. No missed payments, no credit card, no panic. Within half a year, the fund was full again.

That’s what a payment under the red line buys you: bad luck stays bad luck instead of turning into a disaster.

The down payment and PMI

Every dollar you put down is a dollar you don’t pay interest on for thirty years. Here’s what different down payments do to Danny’s $165,000 house at 7%:

PMI estimated at 0.5% of the loan per year. Property tax 1%, insurance $1,500 a year.

Going from 5% to 21% down cuts Danny’s payment by about $244 a month and saves him over $37,000 in interest if he keeps the loan for the full term.

What PMI is (and isn’t)

Private mortgage insurance is usually required on a conventional loan when you put down less than 20%. It doesn’t protect you. It protects the lender in case you stop paying. The cost depends on your credit score and down payment; the 0.5% a year above is just an example, and your lender will quote the real figure.

The good news: on a conventional loan, PMI doesn’t last forever. Under federal law, you can generally ask your lender to cancel it once you owe 80% of the home’s original value, and it generally ends automatically at 78%. FHA loans work differently; their mortgage insurance often lasts much longer, sometimes for the life of the loan.

Low-down-payment options

FHA loans allow down payments as low as 3.5% for borrowers who qualify, with their own mortgage insurance. Many states and cities run down payment assistance programs for first-time buyers. They’re worth a search before you assume you can’t buy. Just remember that a smaller down payment means a bigger loan, so run the payment against your red line, not the lender’s.

How to lower your payment without stretching

If your numbers don’t buy much where you live, these are the levers that actually move the payment.

• Shop lenders. Get at least three quotes on the same day for the same loan. On a $130,000 loan, 7% versus 6.75% is about $22 a month and roughly $7,800 over 30 years. Freddie Mac has noted that getting multiple quotes can potentially save buyers thousands.
• Work on your credit. Higher scores generally get lower rates. If you’re a few months away, paying down card balances and paying every bill on time can be worth real money.
• Grow the down payment. See the table above. Reaching 20% usually removes PMI entirely.
• Change the house. Smaller, older, or a little farther out. Your first home doesn’t have to be your forever home. It just has to be one that doesn’t sink you.
• Watch property tax and HOA. Two houses at the same price can have very different payments. A $250 HOA eats the same budget as roughly $33,000 of house price.

Loan term and future refinancing

A 15-year mortgage usually carries a lower rate and far less total interest, but a much higher payment. It only makes sense if that payment still fits under your target. We compare them side by side in 15-Year vs. 30-Year Mortgage.

And be careful with “rates will drop and I’ll refinance.” Maybe they will. Nobody can promise it, refinancing has its own closing costs, and you’d have to qualify again with whatever your income and credit look like then. A plan that only works if rates fall is a bet. If you already own and rates have moved, here’s how to check whether refinancing makes sense.

What if your number doesn’t buy anything near you?

You have honest options, and none of them involve being house poor:

• Wait and grow the down payment. Six to twelve months of focused saving can change the math more than you’d think.
• Buy smaller or farther out than you’d like, for now.
• Raise your income first and let your number catch up.
• Keep renting. Renting a little longer is not failure. Buying a house that owns you is. If you’re on the fence, run the comparison in Rent vs. Buy: How to Decide With Real Numbers.

Common mistakes that push buyers over the line

• Using the pre-approval as a budget. It’s a ceiling, not a target.
• Touring above your number “just to see.” Your brain compares houses to each other, not to your budget. After a $240,000 house, a $165,000 house feels small.
• Counting only principal and interest. Tax, insurance, PMI and HOA are part of the payment.
• Emptying every account at closing. If the down payment takes your emergency fund, you’re one repair away from a credit card balance.
• Pausing retirement savings to make it work. If the only way to afford the house is to stop investing, you can’t afford the house yet.
• Counting on two incomes forever. Jobs change, babies arrive, people get sick.

Already bought above the red line?

You’re not alone, and you’re not stupid. You did what the system told you was fine. Here’s the order to work in:

1. Build a small emergency fund first, even one month of expenses.
2. Shop your homeowners insurance every year, and check whether you can appeal your property tax assessment.
3. Track your loan balance so you can ask to cancel PMI the moment you’re eligible.
4. Make the house pay you back: a roommate in a spare bedroom can cover a real chunk of the payment.
5. Grow your income, even for a season.
6. If the house still takes more than half your take-home, talk to a HUD-approved housing counselor (free or low cost) about your options, including selling on your own terms before you’re forced to.

What to do this week

1. Find your real take-home pay on your last pay stub and write down your target (25%) and red line (33%).
2. Multiply your gross yearly income by 3 and write that next to them.
3. Run all three through the calculator above with your actual down payment, local property tax rate and an insurance quote.
4. Run the stress test: cut your take-home by 20% and check the payment is still under a third.
5. Count your cash: down payment plus 2% to 5% for closing costs, with your emergency fund untouched.
6. Tell your agent, in writing, the maximum list price you want to see, and stick to it.

Frequently asked questions

How much house can I afford with a $70,000 salary?

Using a 25% target on take-home pay, 7% rate, 1% property tax, $1,800 a year insurance and about 20% down, roughly $165,000, with a ceiling around $207,000 to $210,000. Your taxes, rate and debts will change that. See the full tables in our house affordability by salary guide.

What is the 28/36 rule?

A lender guideline: housing costs up to 28% of gross monthly income, and all debt payments up to 36%. It’s measured on income before taxes, so it allows more house than a take-home-based budget. Many lenders now approve above 36% total.

Is the 3x income rule still realistic?

It’s a rule of thumb that keeps the size of the loan in check. In expensive areas it can feel impossible, which is a signal to look at a bigger down payment, a smaller home, a different area, or renting longer, not a reason to ignore the payment math.

Should I include utilities and maintenance in my housing budget?

Your 25% and 33% figures are for the payment itself (mortgage, tax, insurance, PMI, HOA). But set aside 1% to 2% of the home’s value a year for maintenance, and make sure the payment plus that set-aside still sits under your red line.

Do I need 20% down to buy a house?

No. Conventional loans can go lower, and FHA loans allow 3.5% for borrowers who qualify. Below 20% you’ll usually pay mortgage insurance, and you’ll borrow more, so check the full payment against your red line.

Keep reading

• Pre-Approved vs. Affordable: Why the Bank’s Number Isn’t Your Number
• How Much House Can I Afford on a $60K, $80K or $100K Salary?
• Rent vs. Buy: How to Decide With Real Numbers
• 15-Year vs. 30-Year Mortgage: Which Saves You More?

Education, not financial advice. The numbers here are examples; talk to a licensed professional about your own situation. Some links may be sponsored or affiliate links; see our disclosure.