Write down every cost a seller pays in your area, with how it's worked out (a fixed fee, or a percentage of the price). Include monthly holding costs: loan payment, maintenance fees, insurance, utilities.
Go to claude.ai or open the app. Paste the 'Build the calculator' prompt below with your cost list filled in.
Claude makes a small interactive page (it calls this an artifact) right in the chat. Type in some numbers and watch the two columns change.
Enter the figures from a sale you've already completed. If the answer doesn't match the final statement, tell Claude what's wrong in plain words and it will fix the formula.
Use the download or publish option on the artifact to get a link or file, and bookmark it on your laptop or tablet.
Fill it in with the seller. Try a few prices and timings together so they can see the trade-off for themselves.
Use the 'Seller summary' prompt to get a one-page version you can print or email after the meeting.
Build me a one-page seller net sheet calculator as an interactive web page (HTML and JavaScript, no sign-up, works offline). Inputs: sale price, outstanding loan balance, agency fee [as agreed: fixed amount or %], legal fees [amount], [stamp duty / transfer tax: how it is worked out], loan early-repayment fee [% or amount], other selling costs, and monthly holding costs (loan payment, maintenance fees, insurance, utilities). Show two scenarios side by side: Scenario A (price A, sold in [1] month) and Scenario B (price B, sold in [3] months). For each, show every cost line, total holding costs for the months waited, and estimated money to the seller. Highlight the difference between A and B. Use [currency] for all amounts. Add this footer: 'Estimate only. Final figures come from the completion statement.'💬 Seller summary (optional)
Using the numbers now in the calculator, write a plain-English one-page summary for [seller name] about [property address]: the two options, what they'd take home in each, and the main reason the figures differ. Keep it neutral: don't recommend a price and don't promise how fast it will sell. End with 'Estimate only; your lawyer's completion statement is final.'
From https://usecasy.com/use-case/claude-seller-net-sheet/ · Guide checked 21 October 2026 · Prices are rough and shown in USD unless stated (MYR where relevant).