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Mortgage & Payment Planning
Use this calculator as a planning tool, not a decision tool.
The payment formula
What Creates a Payment?
A home payment is more than the purchase price divided over time. These pieces work together to create the monthly number you actually live with.
Principal
The portion of the payment that goes toward paying down the amount borrowed.
Interest
The cost of borrowing money. Rate changes can significantly affect monthly payment.
Taxes
Property taxes vary by county, city, exemptions, and assessed value.
Insurance
Homeowners insurance, flood coverage, and policy details can change the monthly cost.
HOA
Neighborhood, townhome, or condo dues can affect affordability and financing comfort.
Use it wisely
What the Calculator Does Well
Estimate Payment
Test a likely monthly payment before deciding whether a home fits your comfort zone.
Compare Scenarios
Compare different prices, rates, loan assumptions, and monthly payment outcomes.
Test Down Payments
See how different down payments may affect monthly cost and cash needed.
Explore Affordability
Use the numbers to decide what feels comfortable, not just what is technically possible.
What the Calculator Does Not Know
A calculator cannot confirm your final interest rate, exact taxes, final insurance premium, lender fees, HOA changes, escrow adjustments, repair costs, utility costs, or how the payment will feel inside your real life.
Use the calculator to plan. Use your lender to confirm. Use your own comfort level to decide.
Comfort check
Affordability Considerations
Payment Comfort Zone
The most useful number is not always the highest payment you can qualify for. The better question is whether the payment supports your lifestyle, savings, emergency fund, and long-term goals after closing.
Launch Calculator
Use the calculator to test payment scenarios, then talk with your lender about the assumptions behind the numbers. Online calculators are useful planning tools, but your lender should confirm real taxes, insurance, rate, loan type, credits, and cash needed to close.
DUFFY Recommendation
DUFFY encourages buyers to think in terms of payment comfort, cash needed, and long-term ownership costs before making emotional decisions. A home may look perfect online, but the payment still has to support the life you want after closing.
Buy the payment you can comfortably live with.
The right home should support your life after closing, not squeeze it.