Are you rent-burdened? The 30% rule says housing should not exceed 30% of gross income; severely cost-burdened is 50%+. HUD uses these thresholds for affordability research.
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Loading calculator…
Calculator information
📋 How to use this calculator
- Enter your monthly gross income (before taxes).
- Enter your monthly rent (excluding utilities).
- Review your rent-to-income ratio and HUD classification.
- 30% rule: rent-burdened. 50%+ rule: severely cost-burdened.
- Compare to median rent burden in your metro for context.
🧮 Rent Burden Ratio (HUD)
Rent_burden_ratio = Monthly_rent / Monthly_gross_income
- <30%: Not rent-burdened (HUD affordability threshold)
- 30-49%: Rent-burdened
- ≥50%: Severely cost-burdened
- HUD definition includes rent + utilities (FMR — Fair Market Rent measure)
- Most analyses use just rent (excluding utilities) for simplicity
Approximately 22.4 million US renter households (over 50% of all renters) were cost-burdened in 2023 per HUD data — record-high level. Severely cost-burdened: 12.1 million. Most concentrated in CA, FL, NY, TX, NJ. The 30% rule originates from 1981 federal definition; many financial advisors now suggest 25% for housing including utilities.
💡 Worked example: $3,500/mo income, $1,200/mo rent
Given:- Monthly gross income: $3,500
- Monthly rent: $1,200
- Includes utilities? No
- Location: Phoenix, AZ
Steps:- Rent-to-income: $1,200 / $3,500 = 34.3%
- Classification: Rent-burdened (30-49% range)
- Above 30% threshold by 4.3 percentage points
- Annual rent: $14,400 = 41% of gross
- To be unburdened: rent ≤ $1,050/mo
Result: Rent-burdened by HUD definition. Adding $200/mo utilities pushes to 40% burden. Phoenix median rent burden 2025: 34% — at the metro median, which itself is unsustainably high.
❓ Frequently asked questions
Where does the 30% rule come from?
1969 Brooke Amendment to the US Housing Act capped tenant rent in public housing at 25% of income (revised to 30% in 1981). HUD then formalized 30% as the affordability cutoff for ALL housing — not just public. The 30% number was arbitrary, not optimization-based, but stuck as a national standard. Critics: 30% works for low-income households (where saving 70% is sufficient for necessities) but for high earners, 50% rent burden may still leave more absolute savings than 25% burden for a low-income earner.
Is being rent-burdened really that bad?
Statistically: yes. Cost-burdened renters are 3x more likely to forgo medical care, 2x more likely to be food-insecure, 4x more likely to have <$400 in emergency savings, 5x higher eviction risk during income disruption. The 30% threshold isn't arbitrary economically — it's the level at which other necessity-spending crowds out. Beyond 50% severely cost-burdened, the financial situation is precarious by most measures.
Why is the 30% rule criticized today?
Three lines of critique: (1) Geographic blindness — 30% rent in Manhattan funds a different lifestyle than 30% in Topeka; (2) Income-blind — 30% on $40K vs $400K is different reality; (3) Pre-tax vs post-tax — 30% of gross income is closer to 38-42% of take-home pay for middle-income households. Modern advisors suggest: 'rent ≤ 25-28% of TAKE-HOME (net) pay' or 'after-rent income ≥ $2,500/mo for single adult' as updated thresholds.
How does rent burden affect my credit / loan applications?
Lenders increasingly consider rent burden via 'rent verification' for borrowers without traditional credit history. High rent-burden (>40%) reduces mortgage qualifying — lenders calculate front-end DTI (housing payment ÷ gross income) target ≤28%, back-end DTI (total debt ÷ income) ≤36-43%. A renter spending 40% on rent typically can't qualify for a mortgage payment higher than current rent. Solution: reduce rent or boost income before mortgage application.
What if my income is unstable (gig worker)?
Use rolling 12-month average income, not best/worst month. Gig workers should target 25% rent-burden (vs 30%) to absorb income volatility. Build 6-month emergency fund covering full rent. Some advisors recommend pegging rent at 28% of your lowest historical 3-month income — a stress-test approach. Document gig income with 1099s for any future rental/mortgage applications.
📚 Sources & references
Last updated: May 23, 2026