CALCMONEY // HOME AFFORDABILITY // FL // KEY BISCAYNE
How much house can you afford in Key Biscayne? Based on local median home prices, current FL mortgage rates, and Key Biscayne property tax data.
$2,800,000
$18,084/mo
$775,049/yr
$84,572
Monthly housing costs of $18,084 represent 131.5% of Key Biscayne's median gross monthly income ($13,750/mo). At 131.5%, median-income buyers in Key Biscayne are significantly stretched — well above the 28% guideline. A larger down payment or higher income is required.
| Median Home Price | $2,800,000 |
| Down Payment (20%) | $560,000 |
| Loan Amount | $2,240,000 |
| Monthly PI Payment | $14,678 |
| Monthly Property Tax | $2,240 |
| Monthly Insurance Est. | $1,167 |
| Total Monthly PITI | $18,084 |
| Housing Cost % of Income | 131.5% |
| Required Income (28% rule) | $775,049/yr |
| Max Affordable Home | $84,572 |
$98,000
$23,026/mo
Key Biscayne Home Affordability Quick Reference 2026
| Metric | Value | Notes |
|---|---|---|
| Median Home Price | $2,800,000 | Key Biscayne city median |
| Down Payment (20%) | $560,000 | Conventional loan |
| Monthly PITI | $18,084 | 6.85% rate, 30yr fixed |
| Required Income (28% rule) | $775,049 | Annual gross |
| Max Affordable Home | $84,572 | Based on median income |
| FHA Down (3.5%) | $98,000 | Minimum FHA |
| Housing Cost % of Income | 131.5% | Median income: $165,000/yr |
| Property Tax Rate | 0.96% | $26,880/yr on median home |
Monthly PITI includes principal, interest, property tax, and homeowners insurance. Estimates only.
The median home price in Key Biscayne is $2,800,000, with a local 30-year mortgage rate of 6.85%. A buyer putting 20% down carries a loan of $2,240,000, generating a monthly P&I payment of $14,678. Adding property taxes ($2,240/mo) and homeowners insurance ($1,167/mo) brings total monthly PITI to $18,084.
Key Biscayne's property tax rate of 0.96% is near the national average, adding a standard increment to monthly housing costs. On the Key Biscayne median home, that is $2,240/month, or $26,880 per year.
Florida has no state income tax, improving effective take-home pay for Key Biscayne residents and giving buyers additional capacity relative to equally-priced homes in high-tax states.
Using the 28% rule, a household earning Key Biscayne's median income of $165,000/year can afford up to $3,850/month in total housing costs. Based on Key Biscayne's mortgage rate of 6.85% and property tax rate of 0.96%, that translates to a maximum affordable home price of approximately $84,572 with 20% down on a 30-year loan.
To afford the median Key Biscayne home priced at $2,800,000, you need an annual gross income of approximately $775,049. Total monthly housing costs (principal and interest of $14,678, property taxes of $2,240, and insurance of $1,167) come to $18,084/month, which equals 28% of the required income.
At the median home price of $2,800,000 and median household income of $165,000, the total monthly housing cost of $18,084 represents 131.5% of gross monthly income. This is well above the standard 28% threshold, making Key Biscayne a challenging market for buyers at median income.
A conventional 20% down payment on the median Key Biscayne home of $2,800,000 is $560,000. An FHA loan requires just 3.5% down — $98,000 — but adds mortgage insurance of roughly $1,914/month, bringing total FHA payments to $23,026/month.