Base scenario
Use your current numbers to establish a realistic property comparison baseline.
This gives you a reference point for every change you test next.
Property Comparison Calculator
Compare two investment properties side-by-side to determine which offers better returns.
Financial Calculator
Free financial calculator to help you make informed decisions about your money.
Your Results
Enter your information above to see personalized calculations.
Calculated Result
Monthly Amount
Total Cost
Detailed Breakdown
How to use this calculator: Enter your financial information in the fields above. Results update automatically as you type. All calculations are performed locally in your browser - we never store or share your personal financial data.
⚠️
⚠️ For Planning Purposes Only
These calculations are estimates for educational and planning purposes. Always consult with qualified financial professionals before making financial decisions.
How the Math Works
- The calculator converts your inputs into monthly and annual totals, then applies category-specific formulas for Property Comparison.
- Intermediate values are rounded for display, but calculations preserve precision until final totals are shown.
- Scenario outputs compare baseline values against changed inputs so you can estimate tradeoffs quickly.
Assumptions
- Inputs are treated as stable over the time period you select.
- Rates and costs are assumed to remain constant unless you model a change manually.
- Results are planning estimates, not a lender quote, tax filing output, or legal advice.
Worked Examples
Conservative scenario
Increase key costs by 10% and reduce expected upside by 10%.
If the result still works, your plan likely has a practical safety margin.
Optimized scenario
Adjust one or two controllable levers (rate, payment, timeline, or contribution).
Compare whether the gain is meaningful enough to justify the extra effort.
When This Estimate Breaks
- Your actual numbers can differ when taxes, fees, policy rules, or market pricing change.
- Large life changes (income shifts, relocation, new debt, job changes) can invalidate assumptions quickly.
- Use this estimate with real quotes/statements before making a final financial decision.
Methodology and Editorial Review
- The model computes a baseline from your entered inputs, then recalculates results for each scenario change.
- Displayed values are rounded for readability while internal calculations keep precision until output formatting.
- Editorial review validates formula consistency, assumptions, and user-facing interpretation text.
Author: Affordably Editorial Team
Financial review: Affordably Financial Review Team
Sources and Last Updated
- Consumer Financial Protection Bureau
- Federal Reserve Economic Data (FRED)
- IRS (Tax Topics and Instructions)
Last updated: February 20, 2026
Related Resources
Explore this topical cluster: Personal Finance Planning
Related Calculators
How Property Comparison Calculator Works
Compare multiple investment properties side-by-side using key metrics like cash flow, cap rate, cash-on-cash return, and total ROI. Make objective decisions about which property offers the best investment opportunity.
1
Enter Property Details
Input purchase price, expected rent, and location for each property you're considering (typically 2-4 properties).
2
Add Financing Terms
Enter down payment, interest rate, and loan term for each property. Financing significantly impacts cash flow.
3
Input Operating Expenses
Add property taxes, insurance, HOA, expected maintenance, and property management for accurate net income.
4
Calculate Key Metrics
See cap rate, cash-on-cash return, gross rent multiplier, and cash flow for each property side-by-side.
5
Factor in Qualitative Elements
Consider location quality, appreciation potential, tenant pool, and management complexity alongside numbers.
6
Make Data-Driven Decision
Review the comparison and select the property that best matches your investment goals and risk tolerance.
Key Factors Considered:
- ✓Purchase price and financing terms
- ✓Gross rental income potential
- ✓Operating expenses accuracy
- ✓Cap rate comparison
- ✓Cash-on-cash return
- ✓Cash flow per unit
- ✓Appreciation potential
- ✓Location and tenant quality
- ✓Management complexity
Why Compare Properties Objectively
- Remove emotion from investment decisions
- Identify the best deal among multiple options
- Compare different property types fairly
- Understand trade-offs between properties
- See impact of different financing scenarios
- Quantify the opportunity cost of each choice
- Make faster decisions with clear data
- Justify decisions to partners or lenders
Key Terms to Know
- Gross Rent Multiplier (GRM)
- Purchase price divided by annual gross rent. Quick screening tool. Lower GRM = relatively cheaper. Typical range: 8-15 depending on market.
- Price Per Unit
- Purchase price divided by number of units. Useful for comparing multi-family properties of different sizes. Varies widely by market and condition.
- Price Per Square Foot
- Purchase price divided by total square footage. Helps compare properties of different sizes. Include only livable/rentable space.
- Break-Even Ratio
- (Operating expenses + debt service) ÷ gross income. Lower is better. Shows how much income is needed to cover costs. Target: 80% or lower.
Pro Tips
- →Don't just compare price - compare return on investment
- →Cash-on-cash return shows actual return on YOUR money
- →Higher cap rate often means more risk or work required
- →Consider appreciation potential, not just current income
- →Factor in your time for management if self-managing
- →Location matters more than almost any number
- →Best returns often require more active management
- →Don't forget deferred maintenance that affects true cost
- →Compare apples to apples: same property class and market type
- →The best deal on paper may not fit your portfolio goals
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How These Results Are Calculated
Each calculator uses standard financial formulas and explicit assumptions to generate educational estimates. Results are based on your inputs and may vary based on rates, taxes, fees, and local market conditions.
- Public data sources include the IRS, BLS, Census, Federal Reserve, and state agencies.
- Calculators are reviewed periodically to reflect market and tax-rule changes.
- These results do not replace personalized professional advice.
GA
Reviewed by the Founder of GetAffordably
This content was created with AI assistance and reviewed by the founder of GetAffordably. Financial data is sourced from the U.S. Census Bureau, Federal Reserve, IRS, and other public records, and is verified periodically.
Last updated: May 2026