Manor Keeper
Pro PM
Notes for property managers running Harbor-size portfolios, plus the operations and finance archive.
New posts for property managers, delivered when a post drops.
Ten free Manor Keeper calculators DIY landlords can use in 2026 — late fees, prorated rent, screening math, vacancy cost, depreciation, and cash flow — without buying a property-management suite.
Read articleA practical walkthrough of calculating total vacancy costs—lost rent plus turnover expenses—and how these numbers shape decisions about pricing, screening speed, and lease renewals.
Read articleA practical guide to using the rent increase calculator to model CPI-based and fixed percentage increases, calculate annual revenue impact, and make data-driven renewal pricing decisions.
Read articleRefinancing costs money upfront and saves money monthly. This calculator shows how long it takes to break even—and when refinancing doesn't make sense for landlords.
Read articleA practical walkthrough of calculating prorated first-month rent when tenants move in mid-month, common mistakes landlords make, and how to align lease dates with rent collection.
Read article