Do lenders combine both incomes for a mortgage?

Yes, lenders combine both incomes when both partners are on the mortgage application. Both credit scores are also considered, with lenders typically using the lower of the two scores.

How Much House Can We Afford on $100K Combined Income?

Q: How much house can we afford on $100K combined income?

On $100,000 combined household income, you can typically afford a $300,000-$400,000 house, depending on down payment, interest rates, and other debts. Using the 28% front-end ratio, your max housing payment is $2,333/month.

On $100,000 combined household income, you can typically afford a $300,000-$400,000 house. Here’s the breakdown.

Quick Answer

Conservative (28% rule)	Moderate	Aggressive
$300,000	$350,000	$400,000

Assumes 6.5% interest rate, 20% down payment, typical taxes/insurance

Maximum Monthly Housing Payment

Rule	Calculation	Max Monthly PITI
28% front-end ratio	$100,000 × 0.28 ÷ 12	$2,333
Conservative (25%)	$100,000 × 0.25 ÷ 12	$2,083

House Price by Down Payment

With a $2,333/month PITI budget:

Down Payment	Home Price	Loan Amount	P&I Payment
5% ($17,500)	$350,000	$332,500	$2,101
10% ($35,000)	$350,000	$315,000	$1,991
20% ($70,000)	$350,000	$280,000	$1,770
20% ($80,000)	$400,000	$320,000	$2,022

6.5% interest, 30-year fixed

Full Monthly Payment Breakdown

On a $350,000 house with 20% down:

Component	Amount
Principal & Interest	$1,770
Property Tax	$360
Homeowners Insurance	$200
PMI (if < 20% down)	$0
Total PITI	$2,330

Almost exactly at the 28% limit.

How Other Debts Affect Affordability

Lenders use the 36-43% back-end (DTI) ratio for all debts:

Existing Debts	Max Housing	Home Price Impact
$0/month	$2,333	$350,000+
$300/month (car)	$2,033	$310,000
$500/month (car + student loans)	$1,833	$280,000

Two Incomes: Pros and Cons

Advantages:

Higher combined borrowing power
Easier to save for down payment
One income can cover payments if needed

Risks:

Job loss impacts mortgage payments
Don’t stretch to max just because you can
Consider: Can one income cover payments alone?

Where $100K Combined Income Goes Furthest

City	Median Home Price	Affordable on $100K?
Pittsburgh, PA	$230,000	✅ Very comfortable
Columbus, OH	$285,000	✅ Comfortable
Austin, TX	$450,000	⚠️ Stretching
San Diego, CA	$900,000	❌ No

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

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