What Can I Afford? The House Budget Math That Actually Decides It

Start With the 28/36 Rule, Then Sanity-Check With Income Multiples

Two numbers run the whole show. The 28% rule: keep your total monthly housing cost, that's principal, interest, taxes, and insurance, under 28% of gross monthly income. The 36% rule: keep all your monthly debt payments combined, housing plus car loans, student loans, credit cards, under 36%. That 36% number is your debt-to-income ratio, or DTI. It's monthly debt payments divided by gross monthly income, times 100. This isn't folk wisdom. The Consumer Financial Protection Bureau tracks these standards, and lenders build their underwriting on them.

Want a fast cross-check? Use the income multiplier: a home priced at roughly 3x to 5x your gross annual income. At $50,000 a year, that's about $150,000 to $225,000. At $100,000 a year, about $300,000 to $450,000, with monthly housing capped near $2,333. If the multiplier and the 28% rule disagree, trust the monthly-payment math. That's the number the lender actually uses.

The $55,000 Swing Most Buyers Miss: Rates and the Costs Beyond the Mortgage

Here's the number that surprises people. The same $1,500 monthly payment on a 30-year loan buys about a $293,000 home at a 5.5% rate. Drop to $264,000 at 6.5%. Drop again to about $238,000 at 7.5%. Your budget didn't move an inch. Your buying power still fell $55,000.

Then there's everything a mortgage calculator never shows you. Property taxes average about 1.1% of home value a year, ranging 0.3% to 2.2% depending on state. Homeowners insurance runs $1,200 to $3,000+ annually. PMI adds 0.5% to 1.5% of the loan if you put down less than 20%. Set aside another 1% to 2% of home value every year for maintenance. Closing costs add 2% to 5% of the purchase price on top.

The single biggest mistake: stretching to the maximum approval amount. The lender approves you right up to the 36% line and leaves zero room for any of the above. One more real number, from the National Association of Realtors: the typical first-time buyer puts down just 8%, not 20%. Budgeting for PMI isn't a failure. It's normal.

What Buyer Affordability Means When You Are the Florida Seller

Affordability math isn't just a buyer's problem. When you sell, your closing can depend on whether your buyer's DTI, rate lock, and reserves survive underwriting. A sale that collapses three weeks into escrow can involve a buyer who stretched past that 36% line; pre-approval still leaves underwriting to complete.

With Cash Flow Deals, you choose between the Fast Cash Offer, where we buy your house as-is and close, and the Premium Cash Offer, where a pre-approved FHA or conventional buyer we already have, ready to go, pays more and buys directly from you. For Premium, your home may be listed through Silver Door Realty, a licensed Florida brokerage, with a licensed agent and scheduled showings. Explore your selling options for Florida homeowners to compare the paths for your property.

We cover repair costs, and we figure out a way, so nothing comes out of your pocket. With Premium, only what your buyer's lender requires gets fixed, with costs settled from the sale proceeds out of our share. With Fast Cash, we buy as-is, with no repairs for you to make. For both offers, the number is agreed before any work starts, and it changes only if you agree. The one exception: if something structural surfaces that was not visible or disclosed before we signed — foundation issues, hidden moisture, old wiring, cast-iron drain failure — we re-cost it and bring the number back to you. You decide. You can walk away. We disclose what we know at offer time so this almost never happens.

Cash Flow Deals is a Florida real estate investor, not a brokerage. On Premium, your buyer signs a new contract directly with you, title transfers directly to that buyer, and their lender funds the purchase. We are paid as a separate line item on the closing statement. If your buyer's loan falls through, that is our problem, not yours, and you can still take the Fast Cash Offer at its own number instead of the Premium Cash Offer.

Cash Flow Deals' Offer Process:

1. Contact Cash Flow Deals with your Florida property's address. Compare the Fast Cash Offer and Premium Cash Offer. With Fast Cash, we are the buyer, so your sale does not depend on a homebuyer's mortgage underwriting. Premium involves your buyer's lender.

2. Get your offers back within 24 hours and compare what you would receive. For Premium, pre-approval helps assess your buyer's financing strength, but a 36% debt-to-income ratio alone does not establish final loan approval.

3. Discuss the existing close-in-45-days-or-less option and a date you help pick. Your timing depends on the offer you choose; Premium still requires your buyer's final mortgage approval.