How much house can I afford?

Buying a home is often the largest financial decision of your life. Getting the math wrong can lead to decades of financial stress.

Modern suburban house with a green lawn

Beyond the Bank's Approval

The most dangerous mistake a homebuyer can make is assuming that because a bank 'pre-approved' them for a certain amount, they can actually afford it. Banks care about whether you can pay back the *loan*; they don't care about your retirement or your quality of life. A common target is the 28/36 Rule: Your housing costs should not exceed 28% of your gross monthly income, and your total debt payments shouldn't exceed 36%.

However, true affordability must account for the hidden costs of ownership. These include property taxes, homeowners insurance, PMI if you put down less than 20%, and the '1% Rule' for maintenance. On average, you should set aside 1% of the home's value every year for repairs. On a $400,000 home, that's $4,000 a year or $333 a month that isn't part of your mortgage payment.

The Impact of Interest Rates

The total cost of your home is determined more by the interest rate than the sticker price. Over a 30-year mortgage, a 1% difference in interest rates can cost you $100,000 or more in interest. This is why it is vital to have an excellent credit score before applying. Also, consider a 15-year mortgage if possible; it will have higher monthly payments but will save you massive amounts of interest long-term.

Affordability Checklist

Real Life Examples

Mrs. Williams

Teacher • $60k Income • 20% Savings Rate

Mrs. Williams bought a home that cost only 2x her annual salary, despite being approved for double that. Her low mortgage allowed her to pay it off in 15 years.

Mr. Johnson

Project Manager • $90k Income • 10% Savings Rate

Mr. Johnson bought a house using the '30% of net income' rule of thumb. He is comfortable, but he has to be very careful with his 'Wants' category to ensure he can afford home repairs.

Mr. Smith

Sales Executive • $120k Income • 5% Savings Rate

Mr. Smith maxed out the loan the bank offered him for a luxury condo. Between the mortgage, high HOA fees, and property taxes, he has no money left for savings.

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