House Price Affordability Calculator

Affordability Formula:

\[ \text{Affordable Price} = (\text{Monthly Income} \times 0.28) \times \frac{(1 + r)^n - 1}{r \times (1 + r)^n} \times 12 - \text{Down Payment} \]

Monthly Income:

currency

Monthly Interest Rate:

decimal

Loan Term:

months

Down Payment:

currency

Affordable House Price:

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1. What is the House Price Affordability Calculator?

The House Price Affordability Calculator determines the maximum home price you can afford based on your income, debt-to-income ratio, loan terms, and down payment. It uses the standard 28% rule for housing expenses.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \text{Affordable Price} = (\text{Monthly Income} \times 0.28) \times \frac{(1 + r)^n - 1}{r \times (1 + r)^n} \times 12 - \text{Down Payment} \]

Where:

\( \text{Monthly Income} \) — Your gross monthly income
\( r \) — Monthly interest rate (annual rate ÷ 12)
\( n \) — Loan term in months
\( 0.28 \) — Standard debt-to-income ratio for housing
\( \text{Down Payment} \) — Amount you can put down upfront

Explanation: The formula calculates the present value of an annuity (your monthly payments) and adds your down payment to determine the maximum affordable price.

3. Importance of Affordability Calculation

Details: Calculating affordability helps prevent overextension, ensures comfortable mortgage payments, and helps with budgeting for homeownership costs.

4. Using the Calculator

Tips: Enter your gross monthly income before taxes, the monthly interest rate (divide APR by 12), loan term in months, and any down payment amount. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why use 28% of income?
A: The 28% rule is a common guideline suggesting housing costs shouldn't exceed 28% of gross income to maintain financial stability.

Q2: Should I include taxes and insurance?
A: This calculator focuses on principal and interest. For a complete picture, add ~1-3% of home value annually for taxes and insurance.

Q3: What if I have other debts?
A: Lenders typically use 36% total debt-to-income ratio. Reduce the 28% factor if you have significant other debts.

Q4: How does down payment affect affordability?
A: Larger down payments increase affordability by reducing loan amount and potentially eliminating PMI.

Q5: What about property taxes and insurance?
A: These are not included in this basic calculation. For more accuracy, use calculators that incorporate these factors.