Everyone has an opinion about how much house you can afford.
Your bank will tell you one number. Your real estate agent will tell you another. Your parents will tell you something completely different. And somewhere in the middle of all that advice, you are supposed to make one of the biggest financial decisions of your life.
I want to give you a different answer. Not based on what a lender will approve you for. Based on what actually makes sense for your life.
Because those two numbers are not always the same.
What Banks Look At
When a lender evaluates your mortgage application, they look at two ratios.
The first is your front-end ratio — the percentage of your gross monthly income that will go toward your housing payment. Most conventional lenders want this below 28%.
The second is your back-end ratio — the percentage of your gross monthly income that goes toward all debt payments combined, including your new mortgage. Most lenders want this below 36% to 43% depending on the loan type.
These ratios exist for a reason. They are designed to ensure you can make your payments. But they are not designed to ensure you can also eat, save for retirement, handle emergencies, and live a life outside of your mortgage.
A lender approving you for a $350,000 loan does not mean a $350,000 house is the right decision for you.
What You Should Actually Look At
I think about affordability differently.
Before I commit to any monthly payment, I want to know three things.
First — what does this payment leave me with every month after all fixed expenses? If the answer is barely anything, I am not buying that house regardless of what the bank says.
Second — do I have reserves? Homeownership comes with unexpected costs. HVAC systems fail in January. Roofs leak in the middle of a rainstorm. Water heaters do not wait for a convenient time to stop working. If my mortgage payment wipes out my savings, I am one emergency away from a serious problem.
Third — does this payment still make sense if my income drops? Job situations change. If I lose 20% of my income next year, can I still make this payment without destroying everything else in my financial life?
If the answer to all three is yes, I can afford the house. If not, I need a smaller number.
Philadelphia Specifically
Here is why I love Philadelphia for this conversation.
In most major American cities — New York, Boston, San Francisco, Los Angeles — the affordability math is brutal. Median home prices are so high that even dual-income households with good jobs are stretched thin. The ratios work on paper but the reality is suffocating.
Philadelphia is different. The median home price here is a fraction of those cities. You can buy a solid three-bedroom rowhouse in a good neighborhood for $250,000 to $350,000. That changes what affordability actually looks like.
On a $280,000 purchase with 5% down at 6.5% interest, your monthly mortgage payment is approximately $1,682. Property tax in Philadelphia runs about $303 per month. Insurance and maintenance add another $300 to $350.
Total monthly housing cost: roughly $2,285 to $2,335.
To keep that within the 28% front-end ratio, you would need a gross monthly income of about $8,200 — or roughly $98,000 per year household income.
That is achievable for a lot of Philadelphia households. It is not achievable in Manhattan or San Francisco at the same price point.
The First-Time Buyer Advantage
If you are buying your first home in Philadelphia, the affordability picture gets even better.
Between the Philly First Home grant, the K-FIT program, the First Front Door match, and other assistance programs, eligible first-time buyers can receive $25,000 to $35,000 or more in grant assistance. That money goes toward your down payment and closing costs — reducing what you need to bring to the table and potentially lowering your loan amount and monthly payment.
I have written about these programs in detail elsewhere on this site. If you have not read that yet, read it before you assume you cannot afford to buy.
The Number That Actually Matters
The most important number is not the maximum the bank will approve you for.
It is the monthly payment you can make comfortably — meaning without stress, without sacrifice, without lying awake at night doing math.
Figure out that number first. Then work backwards to the purchase price. Then find a property that fits.
That is the order. Not the other way around.
Find Your Number
I built a free Philadelphia Mortgage Affordability Calculator so you can figure out your realistic home budget before you start looking at properties.
Enter your income, your existing monthly debt payments, your down payment, and your target interest rate. It tells you your maximum monthly payment, your maximum loan amount, and your maximum home price — based on the same ratios lenders use, with a Philadelphia context built in.
Know your number before you fall in love with a house that does not fit it.
Use the free Philadelphia Mortgage Affordability Calculator below to find your real home budget.