You know the feeling. You pull up Zillow on your phone during lunch, tap through a few listings, and suddenly you are mentally picking out paint colors for a house that costs twice what you planned to spend. The monthly payment estimate looks high, but you figure you can cancel a streaming service or two and make it work. A lot of people get stuck right there, between what the internet says they can borrow and what their gut says is actually sane.
The problem is that “how much house can I afford” is not a math problem with a single clean answer. Lenders will happily approve you for a number that makes your stomach hurt. Your real budget depends on how you actually live, what you want to save for, and how much risk you can sleep with at night. This guide walks through a realistic way to figure out your number before you fall in love with a listing.
Start With Your Real Monthly Income
Forget your annual salary for a minute. The number that matters is what actually lands in your checking account every month, after taxes, health insurance, and retirement contributions. That is your usable income. If you get paid biweekly, multiply a typical paycheck by 26 and divide by 12 to get a true monthly average. Do not count a year-end bonus unless it is guaranteed and you have received it for several years in a row.
Let us use a concrete example. Say you earn $85,000 a year. After federal and state taxes, health insurance, and a 6% 401(k) contribution, your take-home pay might be around $4,900 a month. That is the number you build from. If you have a partner buying with you, add their take-home pay too, but only the amount that is steady. Freelance income counts if you have two years of tax returns showing consistency, and even then, you might want to use a conservative average.
A common mistake is using gross income because that is what a lender quotes. A lender might say you can spend 28% of gross monthly income on housing. On $85,000, that is about $1,983 a month. But after taxes and deductions, $1,983 is over 40% of your actual take-home pay. That gap is where budgets break. Start with what you actually have, not what an algorithm assumes you have.
The 28/36 Rule Is a Starting Point, Not a Finish Line
You have probably heard of the 28/36 rule. It says you should spend no more than 28% of gross monthly income on housing costs and no more than 36% on total debt, including the mortgage, car loans, student loans, and credit cards. It is a decent screening tool, but it has real limits.
Take a household with $120,000 in gross income. The 28% rule allows $2,800 a month for principal, interest, property taxes, and insurance. That might feel fine if you have no other debt and live in a low-cost area. But if you also pay $600 a month in student loans and $450 for a car, you are already at $1,050 before the mortgage. Adding $2,800 puts total debt at $3,850, which is 38.5% of gross income and above the 36% guideline. A lender might still approve it, especially with good credit, but your monthly budget will feel tight.
Use the rule as a ceiling, not a target. Run your own numbers with take-home pay. A more useful personal rule for many people is to keep housing costs at or below 30% of take-home pay. On $4,900 a month, that is about $1,470. That is a lot less than a lender might approve, but it leaves room for groceries, utilities, savings, and the occasional unplanned car repair.
What the Mortgage Payment Actually Includes
First-time buyers often compare the list price to their rent and stop there. A monthly mortgage payment is not just the principal and interest figure a calculator shows. The full monthly housing cost, often called PITI, includes four parts.
- Principal: the part of the payment that reduces your loan balance.
- Interest: the cost of borrowing, which is front-loaded in the early years.
- Property taxes: assessed by your county or city, and they can rise over time.
- Homeowners insurance: required by lenders, with premiums that vary by state and risk.
If you put down less than 20%, you may also pay private mortgage insurance, or PMI, which protects the lender if you default. That can add a noticeable amount each month. On top of PITI, you should budget for utilities, which are usually higher than in an apartment, plus maintenance and repairs.
Here is a realistic example. A $350,000 loan at a 6.5% interest rate has a principal and interest payment around $2,210. Property taxes might add $350 a month depending on where you live. Insurance could add $120. PMI might add $100 or more if you put down less than 20%. Suddenly the real monthly cost is closer to $2,780, not $2,210. Always estimate the full PITI before comparing a house payment to rent.
Down Payment and Closing Costs Change the Equation
The down payment is the biggest upfront cost, but it is not the only one. Closing costs typically run from 2% to 5% of the loan amount and cover things like appraisal fees, title insurance, loan origination fees, and prepaid property taxes. On a $350,000 purchase, closing costs could be $7,000 to $17,500 on top of your down payment.
A 20% down payment avoids PMI, but it is not required. Many buyers put down 5% or 10% and accept the extra monthly cost. The tradeoff is simple. A smaller down payment means a larger loan, a higher monthly payment, and PMI, but it lets you buy sooner and keep more cash in reserve. A larger down payment lowers the monthly burden and builds equity faster, but it can drain your savings.
Whatever you choose, keep a separate emergency fund after closing. Do not spend every dollar you have to get the keys. A house will surprise you in the first year. A water heater fails, a tree limb falls, or the HVAC needs service. Having three to six months of essential expenses in savings after closing is a practical buffer. If buying the house means your emergency fund drops to zero, the house is too expensive right now, even if a lender says otherwise.
Run a Realistic Monthly Budget Before You House Hunt
Before you look at a single listing, write down your current monthly spending. Not an ideal budget. Your actual spending. Pull up your bank and credit card statements from the last three months and average the categories.
Start with fixed costs: rent, car payment, student loans, insurance, phone, internet, subscriptions. Then add variable costs: groceries, dining out, gas, entertainment, clothing, pet care, childcare. Finally, add savings goals: retirement contributions beyond payroll deductions, a Roth IRA, a vacation fund, or a sinking fund for car replacement.
Now subtract all of that from your take-home pay. What is left is the maximum you could put toward a mortgage without cutting anything. If that number is $1,800, do not shop for a $2,400 payment and promise yourself you will cook at home more. That promise rarely survives the first six months of homeownership, when you are buying a lawnmower, window blinds, and a ladder.
Here is a quick example. Take-home pay is $5,200. Current non-housing spending averages $2,900. Savings goals outside retirement are $400. That leaves $1,900 for housing. Using the 30% of take-home guideline gives you $1,560, which is more conservative. The right number is somewhere in that range, not the $2,600 a lender might approve.
How to Check Current Rates and Loan Options Without Getting Lost
Interest rates change constantly, and they vary by lender, loan type, credit score, and down payment. You do not need to memorize today’s rate. You need to know how to shop for one. Start with a few established sources to get a baseline. Bankrate has long published rate comparisons and mortgage calculators. NerdWallet offers similar tools and educational guides. You can also check rates directly with a large national bank, a local credit union, or an online lender, though keep in mind that advertised rates assume excellent credit and a specific loan profile.
When you are ready to get serious, apply for preapproval with two or three lenders within a couple of weeks. Mortgage inquiries made within a short window, often 14 to 45 days depending on the scoring model, are generally treated as one inquiry for credit scoring purposes. Compare the loan estimates side by side. Look at the interest rate, the annual percentage rate, or APR, which includes some fees, and the total closing costs. Ask each lender for a loan estimate on the same loan amount, down payment, and loan type so the comparison is fair.
Do not chase the lowest rate at the expense of everything else. A lender with slightly higher fees but a responsive loan officer can be worth more than a rock-bottom rate from a company that never answers the phone. Buying a house has deadlines, and a slow lender can cost you a purchase.
Fixed vs. Adjustable and Other Loan Types
Most buyers are best served by a fixed-rate mortgage. The interest rate stays the same for the life of the loan, which makes the principal and interest payment predictable. A 30-year fixed loan has lower monthly payments than a 15-year fixed loan, but you pay more interest over time. A 15-year fixed loan saves money in the long run but locks you into a much higher monthly payment.
An adjustable-rate mortgage, or ARM, starts with a lower rate for a set period, often five or seven years, then adjusts periodically based on market rates. That can work if you are certain you will sell or refinance before the adjustment, but certainty is rare. If home values drop or your income changes, you might be stuck with a payment that rises at the worst possible time.
Government-backed loans can help with smaller down payments. FHA loans, insured by the Federal Housing Administration, allow lower credit scores and down payments as low as 3.5%, but they come with mortgage insurance that may last for the life of the loan. VA loans, available to eligible veterans and service members, often require no down payment and no monthly mortgage insurance. USDA loans help buyers in eligible rural areas. Each program has specific rules, so check current guidelines directly with lenders or the relevant government agency.
Common Mistakes That Push People Too High
The biggest mistake is treating lender approval as a budget. A lender looks at your debt-to-income ratio, credit history, and assets. It does not know that you spend $600 a month on groceries, $200 on gas, and $150 on a gym membership you actually use. The lender is not wrong. It is just answering a different question than the one you asked.
Another mistake is ignoring future costs. Property taxes go up. Insurance premiums rise. Utilities in a 2,000-square-foot house cost more than in a 900-square-foot apartment. If you move farther from work, your commuting costs rise. If the house needs a new roof in five years, that is a five-figure expense you should be setting aside for each month.
Some buyers convince themselves they will grow into the payment. They expect a raise, a promotion, or a partner’s income to increase. Maybe those things happen. But a mortgage is a 30-year commitment, and income is rarely a straight line. Buying below your maximum gives you room to absorb a job loss, a medical bill, or a period of lower income without losing the house.
Finally, do not compare your purchase to someone else’s. A friend with the same salary might have no student loans, a larger down payment gift, or a partner who covers half the bills. Their comfortable payment is not your comfortable payment. Run your own numbers and ignore the rest.
Try the Rent vs. Buy Math for Your Actual Situation
Buying is not always cheaper than renting, especially in the first few years. A mortgage builds equity slowly at first because most of the early payment goes to interest. Meanwhile, you are responsible for repairs, maintenance, property taxes, and insurance. Renting has none of those costs, and it gives you flexibility to move for a job or family reason.
A simple way to compare is to look at the total monthly cost of owning, including PITI, PMI if applicable, utilities, and a maintenance allowance of about 1% of the home’s value per year, versus your current rent. If owning costs $2,800 and you rent for $1,900, the difference is $900 a month. Over five years, that is $54,000. You might build some equity in that time, but you might also spend a chunk of it on a new HVAC system and a bathroom leak repair.
That does not mean you should always rent. Buying locks in a large part of your housing cost, gives you stability, and lets you customize your space. But it only makes sense if you plan to stay for at least five to seven years and if the monthly cost fits your budget without squeezing everything else. If you are unsure about your job, your city, or your relationship, renting a little longer is a perfectly good financial decision.
Set Your Number and Stick to It
Before you contact a real estate agent or attend an open house, write down three numbers. First, your comfortable monthly payment based on your take-home pay and current spending. Second, your maximum monthly payment, which is the absolute ceiling you refuse to cross. Third, your total cash available for down payment and closing costs while keeping a separate emergency fund.
Then work backward from the monthly payment to a purchase price. Use an online mortgage calculator to estimate the price that matches your comfortable payment at current rates. Remember to include property taxes and insurance for your area. That price is your real budget. If a listing is above it, do not open it. If a lender approves you for more, say thank you and ignore the higher number.
Buying a house is emotional, and it is easy to stretch for a kitchen you love or a backyard that feels perfect. But the stress of a too-large payment follows you home every month. A house that fits your budget feels better than a dream house that owns you.
Quick Affordability Checklist
Use this checklist before you start seriously shopping. If you can answer yes to all of these, you are in a strong position. If not, adjust your price range or wait a little longer.
- I know my average monthly take-home pay from the last six months.
- My estimated total housing payment, including taxes and insurance, is no more than 30% of take-home pay, or I have a clear reason to go slightly higher with room to cut elsewhere.
- I have a down payment saved without touching my emergency fund.
- I have enough cash for closing costs and moving expenses.
- I have checked my credit report and know my approximate credit score.
- I have compared loan estimates from at least two or three lenders.
- I have a line item in my budget for home maintenance and repairs.
- I plan to stay in the home for at least five years.
- My total debt payments, including the new mortgage, stay within a range I can manage if income drops temporarily.
- I have not fallen in love with a specific house before running these numbers.
This article is general education, not personalized financial advice.
