The True Cost Home-Buying Planner
Everything the listing doesn’t tell you, in one tidy spreadsheet. Plug in a home and it shows the all-in monthly cost, cash to close, move-in budget, repair reserve, and whether it truly fits your budget. Then compare offers side by side.
$19
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Keys & Cents provides general educational information and estimates, not financial, investment, tax, legal, or real estate advice. Figures are estimates based on public data and stated assumptions; your actual costs will vary. Consult a qualified professional before making decisions. Some links may be affiliate links. See our Terms and Disclosure.

What’s inside
- Monthly Cost: P&I, tax, insurance, HOA, PMI (with auto drop-off), maintenance and utilities
- Closing Costs: itemized estimate with editable line items
- Move-In Budget: down payment, closing costs, movers, repairs and furniture, checked against your savings and emergency fund
- Maintenance Reserve: the 1% rule or a system-by-system repair and replacement fund
- Affordability Check: 28/36 and 43% DTI tests and your max price at each
- Offer Comparison: up to 4 homes side by side, all-in
- Amortization: month-by-month balance, interest and principal
- PDF guide: “The True Cost of Buying a Home” in plain English, with Sterling’s checklists
Who it’s for
First-time buyers, move-up buyers, and anyone who wants to walk into a purchase knowing the real number, not the brochure number.
It’s the same math as our free calculators, plus the parts that are too personal for a web page: your cash, your savings, your shortlist.
Sterling says: The best time to find out a house is too expensive is before you fall in love with the kitchen.
Planner FAQ
What do I get?
An Excel/Google Sheets–compatible workbook (.xlsx) with eight connected tools (plus a Start Here tab), and a 13-page PDF guide that walks you through every cost of buying and owning a home.
Does it work in Google Sheets?
Yes. It uses standard formulas that work in Microsoft Excel, Google Sheets (File → Import) and LibreOffice. No macros.
Is it a subscription?
No. It’s a one-time $19 purchase.
What if it isn’t useful to me?
Email us within 30 days and we’ll refund you. No hoops.