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House Affordability Calculator — result sheet
Estimate a planning price from income, debts, down payment, housing ratio, rate, and taxes or insurance.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Total monthly debt budget = gross monthly income x DTI limit; housing principal-and-interest budget = that budget - existing debts - taxes/insurance; convert that payment to loan principal, then add down payment.
The total DTI limit and recurring-cost deductions are visible rather than hidden in a regional lender model.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Gross annual income — minimum 0; maximum 1000000000
- Existing monthly debts — minimum 0; maximum 100000000
- Down payment — minimum 0; maximum 1000000000
- Total debt-to-income limit — % of gross monthly income; minimum 1; maximum 100
- Monthly taxes and insurance — minimum 0; maximum 100000000
- Annual interest rate — %; minimum 0; maximum 100
- Loan term — years; minimum 1; maximum 100
Worked example
| Input | Value |
|---|---|
| Gross annual income | 100000 |
| Existing monthly debts | 500 |
| Down payment | 100000 |
| Total debt-to-income limit | 36 |
| Monthly taxes and insurance | 500 |
| Annual interest rate | 6.5 |
| Loan term | 30 |
The tool reports a monthly principal-and-interest budget, estimated loan, and estimated home price.
Assumptions and limits
- Fixed-rate fully amortizing loan with monthly payments.
- This is planning arithmetic, not underwriting or an approval decision; lender front-end/back-end rules vary.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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