NYC Affordability

Income is only one of two constraints

Every NYC purchase gets capped by two independent ceilings: how much cash you can bring (down payment, closing costs, and for a co-op, post-closing reserves) and how much a board or lender will approve based on your income. Whichever ceiling is lower is your real limit. A high income doesn’t help if you don’t have the cash, and a large down payment doesn’t help if your income can’t clear the debt-to-income bar. This guide is about the income side specifically; see the co-op reserve guide for the cash side.

The formula

Annual income needed = (monthly mortgage P&I + monthly carrying cost) × 12 ÷ DTI ceiling

The DTI ceiling is the variable that changes the most between purchase types, and it changes the answer by a lot.

The DTI ceiling depends on what you’re buying

• Co-op boards: typically cap debt-to-income at 28%, the long-standing NYC standard (some outer-borough buildings allow 30–35%; conservative Fifth/Park Avenue buildings can cap as low as 20–25%).
• Condo lenders: typically underwrite to a back-end DTI of 43% (standard conforming), with 36% as a more conservative target some lenders and buyers prefer.

That’s not a small gap. A condo lender’s standard ceiling is roughly 1.5x looser than a co-op board’s standard ceiling, applied to the same monthly payment.

Worked example: identical price, two different answers

Take a $700,000 purchase, 20% down ($140,000), a $560,000 loan, and a $1,200/month carrying-cost assumption (maintenance for a co-op, or common charges plus property taxes for a condo):

Scenario	Monthly P&I	Monthly housing cost	DTI ceiling	Annual income needed
Co-op (7.4% rate, board DTI)	$3,877	$5,077	28%	$217,600
Condo (7.4% rate, lender DTI)	$3,877	$5,077	43%	$141,693
Condo (7.4% rate, conservative DTI)	$3,877	$5,077	36%	$169,244

The monthly payment is identical in all three rows: every row uses the same 7.4% rate (the Freddie Mac 30-year average as of October 8, 2026). The ~$76,000 difference between the co-op and standard-condo income requirement comes entirely from which DTI ceiling applies, not from anything about the property itself. That’s just the income side, too. See our co-op vs condo cost guide for how the two also differ on closing costs and resale fees.

A real-world calibration point

This site’s own co-op calculator, using the citywide median co-op sale price (~$506,000, Q1 2025, StreetEasy/Baruch CUNY), its default 7.4% mortgage rate, and the standard 28% board DTI, puts the minimum qualifying income at roughly $172,000. That’s before accounting for a board’s reserve requirement, which is a separate, cash-side hurdle on top of the income number. See the reserve guide for how that math works.

What actually moves the number

A few levers change the required income, and they’re not all equally effective:

• A bigger down payment lowers the loan amount and therefore the monthly P&I, but it doesn’t touch which DTI ceiling applies, so it helps at the margin without closing a 28%-vs-43%-sized gap.
• Paying off other debts helps more than people expect on the co-op side specifically, since board DTI calculations typically fold in car payments, student loans, and other recurring obligations, not just the housing payment. Condo lenders do the same for a full mortgage-qualification DTI, but a co-op board’s number tends to be less forgiving of any other debt sharing the 28% ceiling.
• A different building changes the ceiling itself. Outer-borough co-op boards sometimes allow 30–35% DTI instead of 28%; a lender open to a 43% back-end DTI instead of holding to a conservative 36% target does the same thing on the condo side.
• Interest rate matters, but less than the DTI ceiling does in this comparison: the rows above use the same rate, so the DTI gap alone accounts for the full ~$76,000 swing. For scale, the rise in the 30-year average from about 6.3% in April 2026 to 7.4% in early October 2026 added roughly $20,000 to the co-op row’s required income on its own.

Why this matters more than people expect

Two buyers with identical savings and identical target price can have completely different outcomes depending on whether they’re shopping co-ops or condos, not because of anything about their finances, but because of which entity is doing the underwriting. If your income clears a condo lender’s 43% but not a co-op board’s 28%, that’s not a sign you can’t afford to buy in NYC; it’s a sign you’re looking at the wrong property type for your income profile. Run your actual numbers through both the co-op and condo calculators before ruling either out.