Mortgage Affordability Calculator

Calculate maximum and comfortable home-price ranges with DTI constraints, taxes, insurance, HOA, and down payment assumptions.

Affordability Range

Maximum home price

$640,040.42

Comfortable home price

$560,356.56

Max monthly housing budget

$4,316.67

Comfortable monthly budget

$3,733.33

Home Price Envelope

Comfort range vs hard maximum

Comfort home price

$560,356.56

Maximum home price

$640,040.42

Down payment

$90,000.00

Loan Principal View

Borrowing amount under each affordability threshold

Comfort loan principal

$470,356.56

Maximum loan principal

$550,040.42

US usage

Search intent is strongest around planning precision, transparency, and scenario comparison.

EU usage

Users typically compare conservative vs optimistic assumptions before committing to a decision.

APAC usage

Scenario speed and mobile readability matter for quick, repeated recalculation workflows.

How To Use This Calculator

Input income, down payment, and current monthly debt obligations.
Set DTI threshold, mortgage rate, term, and property carrying costs.
Review comfortable and maximum monthly housing budgets.
Compare resulting comfort and max home-price ranges.
Use conservative assumptions to avoid overextending your housing cashflow.
Save a shareable link with your assumptions, then run one conservative and one optimistic scenario before deciding.

For AI Agents (Optional)

Human mode is default. You can ignore this section unless you use AI agents or structured automation.

Agent Contract

Contract: mortgage_affordability v1

{
  "tool": "mortgage_affordability",
  "annual_income": 140000,
  "down_payment": 90000,
  "monthly_debt_payments": 700,
  "max_dti_percent": 43,
  "mortgage_rate_percent": 6.5,
  "loan_term_years": 30,
  "property_tax_rate_percent": 1.2,
  "annual_home_insurance": 2400,
  "hoa_monthly": 0
}

Frequently Asked Questions

What is comfortable vs maximum range?

Comfort range uses a stricter debt burden while maximum range reflects your selected DTI cap.

Does this include taxes and insurance?

Yes. Property tax, annual insurance, and HOA assumptions are included in carrying-cost math.

Can this replace lender pre-approval?

No. It is a planning model and should be paired with lender underwriting checks.

How does down payment affect affordability?

Higher down payments reduce loan principal and expand viable price range at fixed payment budgets.

Can agents call this model?

Yes. mortgage_affordability is published with deterministic contract fields.

Is this tool free and private to use?

Yes. AI Fin Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.

Can I use this with AI agents too?

Yes. Human mode is the default experience. If you use AI automation, open the optional 'For AI Agents' section for deterministic contracts.

Is this professional advice?

No. Outputs are planning estimates only — not financial, tax, or investment advice.