Spreadsheet calculators for the money questions that come before a big decision
SlateTally makes spreadsheet calculators for big money decisions in the US – buying a rental property, selling what you make or resell, or managing your personal finances. Each one helps you settle a money question before you commit.
For rental property: will this property pay for itself? See monthly cash flow, cap rate, cash-on-cash return, DSCR and a projection for up to 10 years. Planning to live in one unit and rent out the others? The FHA rules (HUD 4000.1) for the self-sufficiency test and mortgage insurance are built in.
For sellers: what do you need to charge so fees don't eat your profit, and what did each item really make? For handmade goods, the fees follow Etsy's published fee and payment policies, including Offsite Ads. For resale, you enter each platform's fees once and see which one leaves you the most.
For personal finance: when will you be debt-free, and what will your wedding really cost? Compare the Snowball and Avalanche payoff orders month by month, or see every wedding vendor's price with the service charge, sales tax and tips added, plus how much to save each month. For couples who share a home, compare four ways to split the bills, see what each of you keeps, and settle up who owes whom.
Every template comes with plain-English instructions, and only the yellow cells can be edited, so the formulas are hard to break by accident.
The templates are built with the help of AI tools, so each one is checked the same way before it is listed: every result in Microsoft Excel is compared with an independent calculation, unusual inputs (a 0% interest rate, 100% vacancy, a $0 price) are tested for errors, and the Google Sheets version is compared with the Excel file cell by cell.
All amounts are in US dollars. The calculators are built on published formulas and official rules, but they are planning tools, not financial, tax or legal advice.
More templates are on the way. Questions about a formula, or an idea for a calculator that isn't here yet? Send a message – happy to help.