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The Mortgage & Real Estate Ally
From first home to investment portfolio — free calculators that give you the honest numbers. Affordability, payment breakdown, investment cash flow, and STR income estimates backed by real operator experience.
🏠 Affordability + 28/36 rule💰 Full payment with taxes & PMI📅 Amortization + extra payment🎁 First-time buyer programs📊 15 vs 30 year comparison🏘️ Investment property cash flow🏖️ STR income by market
🏠 How much house can I afford?
Based on the 28/36 rule used by most lenders — your housing costs should not exceed 28% of gross monthly income, and total debt payments should not exceed 36%.
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📊 Debt-to-income analysis
💡 True cost of homeownership
The hidden costs most calculators ignore: Maintenance (budget 1–2% of home value annually), higher utilities than renting, opportunity cost of the down payment (that cash could be invested), and closing costs (typically 2–5% of purchase price). A $400,000 home at 1.5% maintenance reserve costs $6,000/year in upkeep alone — factor this into your budget before committing.
💰 Mortgage payment calculator
Get your full monthly payment including principal, interest, property taxes, homeowner's insurance, and PMI. Most calculators show only P&I — your real payment is typically $300–$800 higher.
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📋 Full payment breakdown
📊 Payment sensitivity — home price vs interest rate
Monthly P&I payment (principal + interest only) across different home prices and rates. Add taxes, insurance, and PMI for your true payment.
📅 Amortization schedule + extra payment calculator
See your full month-by-month payoff schedule and use the extra payment slider to discover how much interest you can save by paying a little more each month.
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What if I pay $0 extra per month?Drag to see impact
📅 Amortization schedule — first and last 3 years shown
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🎁 First-time buyer program checker
FHA, VA, USDA, and many state programs offer lower down payments and better rates for qualifying buyers. Answer a few questions to see which programs you may be eligible for.
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🎁 Programs you may qualify for
Important: Program eligibility shown here is based on general federal guidelines. Actual eligibility depends on your lender, specific loan limits for your county, debt-to-income ratio, employment history, and other factors. Always verify current program details with an approved lender. FHA and VA loan limits are updated annually by HUD.
📊 15-year vs 30-year mortgage comparison
A 15-year mortgage saves dramatically on total interest but requires higher monthly payments. See exactly what you give up and gain with each option — and when the 15-year breaks even.
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📊 The full financial picture
🏘️ Investment property cash flow analyzer
Most investment property calculators omit vacancy, maintenance, property management, and CapEx reserves — the four expenses that turn positive cash flow into losses. This calculator includes all of them.
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📋 Monthly cash flow breakdown
🏖️ Short-term rental income estimator
Estimates based on published market data from AirDNA and industry reports. Shows conservative, market average, and optimized scenarios — because your actual income depends heavily on listing quality, photography, and management.
📊 Income scenarios
📅 Estimated monthly income (market average)
📚 Learn from a working STR operator
These income estimates are built from market data — but knowing how to achieve the optimized scenario requires strategy. These books by a practicing short-term rental manager cover the complete playbook: