Kill the 1% Rule: Why Rent-to-Payment Is the 2026 Underwriting Metric

Direct answer

Across 54 metros in BiggerPockets’ Summer 2026 Rent-to-Payment report, the average rent-to-payment ratio is about 0.80 (median ~0.76). That means market rent often covers only three-quarters to four-fifths of full monthly PITI—before maintenance, vacancy, and reserves. The old 1% rent-to-price rule is not a shortcut anymore; it is a liability.

Why it matters

Taxes and insurance now move deal outcomes more than small rate differences. Oklahoma City is the cautionary tale: affordable purchase prices, terrible cash-flow math, because insurance can eat a huge share of PITI. Houston and Miami face similar pressure from wind and flood risk. Meanwhile, Midwest metros still cluster near or above break-even on rent-to-payment—which is why Pulse respondents keep naming the Midwest as the best investing region.

Frank’s take

Underwrite like a lender, not like a Twitter thread:

• Use monthly rent ÷ monthly PITI (principal, interest, taxes, insurance) at a realistic rate and down payment.
• Treat 1.0 as the gold standard, 0.75–1.0 as workable with a clear value-add path, and below 0.75 as a turnaround project—not a “cash-flow rental.”
• Get actual insurance quotes and tax estimates before you offer. Average ZIP assumptions are how good operators lose money.
• If the ratio only works after heroic rent growth, it does not work.

A simple desk checklist

1. Pull rent comps that a real tenant would pay in 30–60 days—not peak STR fantasies.

2. Price PITI with today’s rate, 20% down (or your real leverage), and local tax/insurance quotes.

3. Subtract 35–50% of rent for ops (vacancy, maint, capex, management) before you celebrate “cash flow.”

4. Only then decide: buy, renegotiate, or walk.

Bottom line

Cash flow in 2026 is discovered, not assumed. If your model still starts with “1% of purchase price,” rebuild it around rent-to-payment—or you will buy someone else’s expense problem.