Owner-financed real estate usually lives in a spreadsheet and a shoebox of receipts. The Payment Portal replaces both with a shared, audit-trailed dashboard the seller and the buyers can all trust.
A pure, independently-tested financial engine drives everything — amortization that matches the contract spreadsheet to the sub-cent, an estimated payoff-if-paid-today calculator, automated late charges, and an anniversary interest-rate-review state machine tied to the published WSJ Prime rate.
It records payments after the fact rather than processing them — no card numbers, no third-party processor. Passwordless magic-link sign-in, a full audit log of every action, and a privacy-first deployment with no analytics or tracking.
