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Sumline in ChatGPT

Run the numbers without leaving the conversation

Ask ChatGPT for seller net proceeds, buyer cash to close, rental returns or a mortgage payment. Sumline supplies the verified figures, and you can continue the same scenario in Sumline when it is time to prepare a client-ready report.

Ask naturally. Sumline does the math.

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FAQ

Real estate calculator FAQ

Quick answers for agents using seller net sheets and rental property analysis.

What are Client-ready reports?

Client-ready reports turn a verified Seller Net Sheet or Buyer Closing Costs estimate into a clear explanation that the agent can edit and approve. The approved wording is then included automatically in the branded PDF and secure share link. Sumline does not change the calculator results, and nothing is shared until the agent approves it.

What is a seller net sheet?

A seller net sheet is an itemized estimate of a home seller's net proceeds at closing — sale price minus mortgage payoff, agent commissions, title and escrow fees, transfer taxes, and prorations. Real estate agents use it during listing appointments to set realistic price expectations.

How do I calculate net proceeds from a home sale?

Start with the expected sale price, then subtract the outstanding mortgage balance, listing and buyer-agent commissions, state and local transfer taxes, title insurance, escrow fees, prorated property taxes, and any seller concessions. Sumline automates this with 2026 US transaction defaults so you can hand a client an accurate number in under a minute.

How is cap rate calculated?

Cap rate = Annual Net Operating Income ÷ Purchase Price. NOI is gross rental income minus operating expenses (taxes, insurance, management, maintenance, vacancy) but before mortgage payments. A 6–8% cap rate is typical for US residential rentals, though strong markets often trade lower.

What is a good cash-on-cash return for a rental property?

Cash-on-cash return = Annual Pre-Tax Cash Flow ÷ Total Cash Invested. Most US investors target 8–12% cash-on-cash on long-term rentals. Sumline's investor analyzer shows cash-on-cash alongside cap rate and total ROI so buyer's agents can vet deals on the spot.

Can I add my brokerage logo and branding to the PDF reports?

Yes. Estate Pro ($149/year or $19/month) unlocks unlimited client-ready packages with full white-label branding — upload your headshot, brokerage logo, and custom header/footer copy. Every new account can create one complete Seller Presentation Package free to see exactly how it looks.

Is Sumline free for real estate agents?

The calculators are free to use, always. Your first complete Seller Presentation Package — the numbers, a plain-English explanation, a branded PDF, and a secure client link — is free with no credit card required. To keep sending client-ready packages, Estate Pro is $149/year or $19/month. If you only need one more, a single seller or buyer client package is $5 one-time. Saved scenarios and history are included free.

Can I embed Sumline on my agent website?

Yes. Use the Embed button to copy an iframe or script snippet onto your site. The embedded calculator captures seller leads directly to your dashboard and works on every modern agent website builder.

State-specific calculators and in-depth guides.

For agents
Rental property calculator by state
Seller net proceeds by state
Guides