Should I use gross or net income?

Standard guidelines (30%, 40×, DTI) are written against GROSS income. If you only know your take-home (net), use the Net option — we gross it up by ~25% (a rough average of federal+FICA+state tax burden). For exact gross, refer to your most recent W-2 Box 1 + Box 12-D 401(k).

What if I live in a high-cost-of-living area?

In SF/NYC/Boston/Seattle, the 30% rule is often impossible — many tenants pay 40-50% of income. That can work if you have no other debt, a stable job, and you accept lower savings. Just be aware that the financial-planning consensus is that 35%+ on housing crowds out emergency-fund building.

What about utilities?

The 30% rule traditionally includes ONLY rent. If your unit includes utilities, you have ~$100-200/mo more headroom. If utilities are separate, budget ~10% on top (e.g. $150-250 for a 1BR in most US metros) and reduce the rent ceiling accordingly.

Does this account for renters insurance, security deposit, etc?

No — these are one-time or small recurring costs. Renters insurance is typically $10-25/mo; security deposit is one-time (usually 1× monthly rent). Move-in costs (first + last + deposit + broker fee in NYC) can hit 4× monthly rent up front; budget separately.

Should I use gross or net income?

Standard guidelines (30%, 40×, DTI) are written against GROSS income. If you only know your take-home (net), use the Net option — we gross it up by ~25% (a rough average of federal+FICA+state tax burden). For exact gross, refer to your most recent W-2 Box 1 + Box 12-D 401(k).

What if I live in a high-cost-of-living area?

In SF/NYC/Boston/Seattle, the 30% rule is often impossible — many tenants pay 40-50% of income. That can work if you have no other debt, a stable job, and you accept lower savings. Just be aware that the financial-planning consensus is that 35%+ on housing crowds out emergency-fund building.

What about utilities?

The 30% rule traditionally includes ONLY rent. If your unit includes utilities, you have ~$100-200/mo more headroom. If utilities are separate, budget ~10% on top (e.g. $150-250 for a 1BR in most US metros) and reduce the rent ceiling accordingly.

Does this account for renters insurance, security deposit, etc?

No — these are one-time or small recurring costs. Renters insurance is typically $10-25/mo; security deposit is one-time (usually 1× monthly rent). Move-in costs (first + last + deposit + broker fee in NYC) can hit 4× monthly rent up front; budget separately.

Rent Calculator — How Much Rent Can I Afford

Find an affordable monthly rent budget based on your income — using the 30% rule, the 40× annual income rule, and a debt-to-income-aware recommendation that factors in your existing debt payments.

Result

Max affordable rent (30% rule)

$1,800.00

Based on $6,000.00/mo gross income.

30% rule30% of gross monthly income = 30.0% of gross.$1,800.00
40× rule (NYC standard)Annual income ÷ 40 = $72,000.00 ÷ 40. Common landlord screen.$1,800.00
DTI 36% rule36% gross − $400.00 in existing monthly debt. The CFPB-style total-debt rule.$1,760.00
Recommended (most conservative)min(30% rule, DTI rule). Leaves room for savings + emergency fund per typical financial-planning guidance.$1,760.00good
Stretch (if employment is stable)35% of gross — only sustainable with strong job security and no other major debt.$2,100.00

Mid-market range

Source: CFPB qualified-mortgage 43% DTI guideline (Reg. Z §1026.43) — adapted for housing-only as the 28/36 rule. NYC standard 40× rule from NYC Rent Guidelines Board.

Not financial advice — These are guidelines, not approval criteria. Actual landlord requirements vary — many use the 3× monthly-rent standard (income ≥ 3× rent) or 2.5× in soft markets. High-cost-of-living markets (SF, NYC, Boston, Seattle) routinely see tenants paying 40-50% of income for rent; this is feasible but constrains savings.

How to use this calculator

Enter your monthly income — gross (pre-tax W-2) is preferred since the standard rules are written against gross.
Enter existing monthly debt payments (car, student loans, credit card minimums) — this is needed for the DTI rule.
Pick a rule of thumb for the primary number. The breakdown shows all three side by side.
Use the recommended figure for your search ceiling; treat the stretch figure as a maximum only if your job is very stable.

About this tool

The 30% rule is the most widely-cited rent guideline: housing should consume no more than 30% of your gross monthly income, leaving 70% for taxes, savings, transportation, food, and discretionary spending. The 40× rule is what New York City landlords use: your annual income should be at least 40× the monthly rent. The DTI rule (used by mortgage underwriters and adapted here) caps total debt obligations including housing at 36% of gross. This calculator shows all three, plus a "recommended" figure that takes the most conservative of the 30% and DTI rules.

Frequently asked

Each rule captures a different concern. The 30% rule is about household budget balance. The 40× rule is about landlord underwriting (rent collectability). The DTI rule is about overall debt-service capacity. Use all three to set both a personal ceiling and a realistic application target.