The full stack
Lenders qualify you on PITI (principal, interest, taxes, insurance) plus some debts. Actual life adds HOA, higher utilities, yard tools, and irregular big tickets like a roof.
Fixed vs lumpy
Monthly bills feel stable; capex arrives in chunks. A reserve fund turns lumpy costs into something you can plan for instead of putting them on a card at 20% APR.
Anchor payment math
Mistakes
- Using the maximum approved loan as “what we can afford” with no maintenance margin.
- Forgetting PMI until it drops off—budget it until it does.
Use the calculator
FAQ
- What is a sane maintenance reserve?
Many planners cite ~1% of purchase price per year averaged—high-cost markets and older homes may need more.