Most affordability calculators ask one question: how big a payment can you squeeze into your budget? That is the wrong question. The better one is quieter. How much house can you carry for the next ten or twenty years without the rest of your life getting tight?
If you have been running numbers late at night and the answers keep changing, you are not bad at this. The real cost of a home is spread across half a dozen line items, and most of them are easy to miss until they show up on a statement. This guide walks through the full picture so you can decide how much house you can afford with your eyes open.
Start with the payment, not the price
Buyers tend to fixate on the sticker price of a home. Lenders look at the monthly payment, and so should you. A useful starting point is the 28/36 guideline that underwriters have used for decades.
Under that guideline, your housing payment stays at or below 28 percent of your gross monthly income, and your total debt payments stay at or below 36 percent. Housing here means more than principal and interest. It means the full PITI: principal, interest, property taxes, and homeowners insurance, plus mortgage insurance and any homeowners association dues. The Consumer Financial Protection Bureau treats that monthly figure, not the loan amount, as the thing you actually live with.
The 36 percent half matters just as much for the reader carrying a car loan, a student loan, or a balance from a hard couple of years. Your house does not exist on its own. It sits on top of every other payment you already make. A home that fits a blank budget can still be a stretch on a real one.
A quick way to ground yourself: write down your gross monthly income, multiply by 0.28, and that rough number is the housing payment most lenders will be comfortable with. Then multiply your income by 0.36 and subtract your existing monthly debts. Whichever number is smaller is your realistic ceiling.
The 28/36 guideline is a floor, not a wall
Here is where smart people get tripped up. The 28/36 figures are conservative, and plenty of approved loans run higher. Conventional loans backed by Fannie Mae and Freddie Mac often allow a total debt-to-income ratio up to 45 or 50 percent when the rest of the file is strong. Loans insured by the Federal Housing Administration can go higher still in some cases.
A lender pushing your ratio up is not doing you a favor by itself. Approval means you can make the payment on paper. It does not promise the payment will feel comfortable in February when the heating bill lands and the car needs tires. The math is built to protect the loan, not your peace of mind. That is the gap GoodLoan tries to close: we will tell you the number you qualify for and the number that actually fits, and they are often not the same.
Strong compensating factors give you room. A larger down payment, real savings in reserve, and a solid credit history all let underwriters approve higher ratios with confidence. So the question is not only what you can borrow. It is what you can borrow and still sleep.
The down payment is only the first check you write
You have probably heard you need 20 percent down. You do not. A conventional loan can start at 3 percent down for many first-time buyers, and FHA loans start at 3.5 percent, according to program guidelines from Freddie Mac and HUD.
The trade-off for a smaller down payment is mortgage insurance. When you put down less than 20 percent on a conventional loan, you pay private mortgage insurance until you build enough equity. The CFPB notes that you can ask your servicer to cancel that coverage once your balance reaches 80 percent of the home's original value, and it ends automatically at 78 percent. On most FHA loans the insurance behaves differently and can last the life of the loan, which changes the long-run math in a way the headline rate never shows.
So a low down payment is a real door into homeownership. It also raises your monthly cost and your total cost. Neither fact cancels the other. Knowing both is what lets you choose on purpose instead of by accident.
Closing costs: the number nobody quotes you
The down payment is the cost buyers plan for. Closing costs are the one that surprises them. These are the fees to originate the loan, title and recording charges, the appraisal, prepaid property taxes and insurance, and the first deposit into your escrow account. Together they commonly run between 2 and 5 percent of the loan amount.
On a 300,000 dollar loan, that is roughly 6,000 to 15,000 dollars due around closing, on top of your down payment. The CFPB Loan Estimate breaks every one of these charges out by name, and a loan officer can walk you through which fees are fixed, which are shoppable, and which are simply your own money moving into escrow. Reading that document closely is one of the highest-value hours you will spend as a buyer.
What ownership costs after the keys are yours
The payment is not the finish line. A house has running costs a renter never thinks about, and they belong in your affordability math.
Property taxes and insurance usually ride inside your monthly payment through escrow, so they rise when assessments or premiums rise. Then come the costs that arrive on their own schedule: a roof, a water heater, an HVAC system, a tree that comes down in a storm. A common planning rule is to set aside about 1 percent of the home's value each year for maintenance. On a 350,000 dollar home, that is around 3,500 dollars a year, or close to 300 dollars a month you are quietly saving toward the house itself.
Buyers who skip this step are the ones who feel house poor a year in. It is not that they bought badly. It is that the full cost was hidden from them, and nobody is paid to point it out before you sign.
Build your real affordability number
Here is the order that keeps you honest. Start with the payment the 28/36 guideline supports for your income and existing debts. Confirm you have the down payment plus 2 to 5 percent for closing costs without draining every dollar of savings. Add the ongoing costs, taxes, insurance, maintenance, and any HOA dues, into the monthly figure. The amount left over after all of that is what tells you whether a given price is comfortable or just possible.
This is slower than a one-line calculator. It is also the difference between a home that supports your life and one that quietly runs it. You do not need to get every number perfect today. You need a first step that is small and safe.
If you want a second set of eyes, a GoodLoan loan officer can run your real numbers with you, no application required, and show you the payment you qualify for next to the payment that actually fits your month. We are VA-approved and we say no a lot, because a loan that does not fit your life is not a win for anyone. GoodLoan is a licensed mortgage lender (NMLS #1972491). When you are ready, that first conversation is a low-stakes place to begin.
Frequently asked questions
How much income do I need to buy a house?
There is no single income cutoff. What matters is the relationship between your income, your existing debts, and the full monthly cost of the home. Using the 28/36 guideline, your housing payment should sit near 28 percent of gross monthly income and your total debts near 36 percent, though many approved loans run higher with strong credit and reserves.
Is 20 percent down actually required?
No. Many first-time buyers use conventional loans starting at 3 percent down or FHA loans at 3.5 percent down. A smaller down payment usually means paying mortgage insurance for a time, which raises your monthly and total cost, so it is a trade-off to weigh rather than a rule to fear.
What are closing costs and how much should I expect?
Closing costs are the fees and prepaid items due around the time your loan funds, including origination, title, appraisal, and the first escrow deposit. They commonly total 2 to 5 percent of the loan amount and come on top of your down payment. Your Loan Estimate lists each one.
Why does my lender say I can afford more than I think I can?
Approval confirms you can make the payment on paper, based on income and debt ratios. It does not account for maintenance, savings goals, or how the payment feels in a tight month. The number you qualify for and the number that fits your life are often different, and the second one is the one worth planning around.
How much should I budget for home maintenance?
A common planning figure is about 1 percent of the home's value per year. On a 350,000 dollar home, that is roughly 3,500 dollars annually for repairs and upkeep. Setting that aside each month keeps a surprise repair from becoming a crisis.
Can someone help me figure out my real number?
Yes. A GoodLoan loan officer can review your income, debts, and savings and show you both the payment you qualify for and the one that fits comfortably. There is no application needed to have that conversation.
