Know your numbers
before you shop.
Simple, independent tools to help you evaluate home buying budgets, mortgage limits, and renting vs. buying cash flows. No ads, no lead-generation traps, just math.
Simple Budget Gauge
Adjust your income to see simple benchmarks, then choose a detailed tool below.
Explore detailed calculators
Select one of our specialized tools below to adjust interest rates, local property taxes, and custom financial assumptions.
How Much House Can I Afford
Calculate your maximum home purchase price based on gross income, down payment savings, and monthly debts. Compares DTI limits for Conservative, Moderate, and Aggressive risk bands.
How Much Rent Can I Afford
Find your ideal monthly rental budget. Supports dynamic Frugal, Balanced, and Aggressive income tiers, adjusted for take-home pay and existing debt allocations.
How Much Mortgage Can I Afford
Start with a comfortable monthly payment and reverse-engineer the matching home purchase price and loan principal. Helps you set secure target payments before house hunting.
Rent vs. Buy Calculator
Run a detailed multi-year cash flow comparison. Compares renting and investing down payment savings against buying, tracking equity growth, closing costs, and tax assumptions.
We focus on utility, not marketing.
Most affordability calculators are designed by mortgage lenders to qualify you for the largest loan possible. We operate independently, helping you establish sustainable bounds matching your personal budget comfort zone.
No Lead Generation
We do not sell your personal details to real estate brokers or mortgage lenders. Your numbers remain strictly local and private in your browser.
US Financial Guidelines
Formulas integrate conventional DTI limits (36% to 50%), estimated average property taxes, homeowner insurance estimates, and PMI thresholds.
Toggle Risk Sensitivity
Adjust configurations between conservative, moderate, and aggressive bands to visualize how different risk tolerances impact home buying power.
Opportunity Cost Modelling
Our models incorporate what your down payment capital and monthly housing cash difference could earn if invested in the stock market index.
How to Plan Your Housing Budget
Learn the math behind purchase ceilings, rental budgets, borrowing limits, and the rent vs. buy decision.
The Core Mechanics of Housing Affordability
Determining your housing budget starts with four key numbers: your gross income, monthly debts, down payment savings, and the current interest rate. Lenders evaluate these using Debt-to-Income (DTI) ratios—specifically front-end DTI (your monthly housing cost relative to gross income) and back-end DTI (housing cost plus other monthly debts like car payments, student loans, or credit cards).
Our house affordability calculator (also referred to as a home affordability calculator) models these limits. Conventional limits default to a conservative 36% back-end DTI, but conforming loan guidelines allow moderate limits up to 43% or aggressive limits up to 50%. Saving a larger down payment reduces your loan principal, helping you stay under these DTI limits and avoid Private Mortgage Insurance (PMI).
Housing Purchase Ceiling vs. Monthly Loan Sizing
It is vital to distinguish between your total buying power and a comfortable monthly payment. When you ask "how much house can I afford?", you are calculating a total purchase ceiling that includes your down payment savings. However, buying at your absolute limit can become risky if interest rates rise or if your monthly cash flow is tight.
To prevent over-borrowing, our mortgage affordability calculator works in reverse. Instead of starting with income, it starts with a comfortable monthly budget that you choose. It reverse-engineers the maximum loan amount while factoring in property taxes, homeowners insurance, and HOA fees, helping you shop for a home with a target payment in mind.
Sizing Your Rental Budget for Financial Security
Renting offers flexibility and caps your monthly housing liability. A common guideline is the 30% rule, which recommends keeping monthly rent under 30% of your gross income. In competitive markets, landlords often require a strict "40x rule", meaning your gross annual income must be at least 40 times the monthly rent.
Our rent affordability calculator maps your budget into Frugal (20%), Balanced (30%), and Aggressive (40%) tiers. It also projects your net take-home pay allocation, showing exactly how much monthly cash remains for everyday expenses, investments, and savings after paying rent and fixed debts.
The Rent vs. Buy Equation: Modeling Opportunity Cost
Deciding whether to rent or buy is more than just comparing a rent check to a mortgage payment. Buying builds equity but carries heavy unrecoverable costs: closing fees (around 2% on purchase, 6% on sale), amortized interest, property taxes, and annual maintenance (typically 1.5% of the home value).
Renting keeps your capital liquid. If you rent a comparable home and invest your down payment savings plus the monthly cash difference in a stock market index (averaging a historical 7% return), that portfolio can compound aggressively. Our rent vs buy calculator simulates both paths over time to find the crossover year where buying actually begins to outperform renting and investing.
Frequently Asked Questions
Quick answers to common questions about housing budgets, borrowing bounds, and renting.
How much house can I afford based on my income?
As a rule of thumb, target a home price 2.5 to 3.5 times your gross annual income. For a safer budget, keep your monthly housing payment under 28% of your gross income (front-end DTI) and your total monthly debt payments under 36% (back-end DTI).
How much rent can I afford each month?
Aim to spend no more than 30% of your gross monthly income on rent (the standard 30% rule). Many landlords enforce a strict 40x rule, requiring your annual income to be at least 40 times the monthly rent. If you have high fixed debts, lower your target rent to 20% of your gross income.
How much mortgage can I afford with my monthly budget?
Your mortgage limit is determined by your target monthly payment, down payment, interest rate, and loan term. Reverse-engineering a comfortable monthly payment yields your borrowing power. A larger down payment directly increases your home budget without increasing your monthly debt.
Is it better to rent or buy a home right now?
It depends on your timeline. Buying is generally better if you plan to stay in the home for 5 to 7+ years, allowing you to build equity and recoup closing costs. Renting is better for shorter stays, keeping your down payment capital liquid to invest elsewhere.