The Mortgage Calculator Is Wrong | How Much House You Can Actually Afford

What you can actually afford is more complex than you think

You found a home you love. You ran the numbers online. The calculator said yes.

But something still feels off.

That's because the number it gave you is almost certainly wrong. Too high and you end up broke every month. Too low and you sit on the sidelines while prices climb without you.

There's a better way to figure this out.

WHAT YOUR MORTGAGE PAYMENT IS HIDING

Most people think their mortgage payment is their housing cost. It is not even close.

Your real monthly number includes what lenders call PITI: principal, interest, taxes, and insurance. Then add utilities, maintenance, and unexpected repairs on top of that.

Here is a simple example. A $350,000 home might show a mortgage payment of $2,100 a month. But your actual all-in housing cost? Closer to $2,800 to $3,000 or more every single month.

That gap is where people get into serious trouble. Approved one month, drowning in credit card debt six months later.

WHY THE RULES YOU HAVE HEARD DO NOT WORK

You have probably heard of the 28% rule. It says your housing payment should be no more than 28% of your gross income.

Here is the problem. It is based on decade-old lending standards. And it completely ignores your existing debt.

Take a $75,000 salary. Gross income is $6,250 a month. Twenty-eight percent gives you $1,750 for housing. Sounds reasonable. But your actual take-home after taxes might be $4,300. That $1,750 is suddenly 40% of what you actually bring home.

Add a car payment and a student loan? You are now sending over 60% of your take-home pay toward debt. That math leaves nothing for food, gas, or emergencies.

Other rules like the 3x rule, the 50/30/20 rule, and the 333 rule are fine as starting points. But none of them are customized to your life. And none of them are what lenders actually use to approve you.

WHAT LENDERS ACTUALLY LOOK AT

Lenders use debt-to-income ratio, known as DTI. It measures the percentage of your gross monthly income going toward all recurring debt payments.

That includes your mortgage, car payments, student loans, credit cards, child support, and alimony. Everything counts. Even student loans you are not currently repaying.

Most conventional lenders allow a backend DTI up to 45 to 50% with strong credit. FHA and VA programs can go higher. But just because a lender approves you for a certain amount does not mean you should borrow all of it.

A maxed-out DTI means less savings, less breathing room, and a whole lot more stress when real life hits.

A FRAMEWORK THAT ACTUALLY FITS YOUR LIFE

There is no one-size-fits-all rule. After 22 years and over 2,000 families helped, here is how to think about it in tiers:

• Safety Tier: 30% or less of net income toward housing. Maximum flexibility, maximum breathing room.

• Balance Tier: 31 to 40% of net income. Realistic for most first-time buyers who are stable and ready.

• Stretch Tier: 41 to 47% of net income. Only works with solid reserves, growing income, and strong job stability.

Which tier fits you depends on your debts, your career stage, your family situation, and your risk tolerance. The math alone will not tell you that.

THE DREAM HOME REALITY CHECK

Ever wonder what it actually costs to carry a $3 million home?

With 10% down, a 6% rate, taxes, insurance, and maintenance reserves, you are looking at roughly $22,600 per month. Just to stay under 40% of net income at that payment level, you need around $57,000 a month in income. That is a million-dollar gross annual salary.

Lenders might approve someone at $600,000 income. But qualifying and comfortably living inside that payment are two completely different things.

Dream big. But know the real number.

WATCH THIS BEFORE YOU BUY

The video breaks down every salary range from $75,000 to $300,000 and shows you exactly where you stand using real lender math, not generic

Work with me

Best,
Robert