See what goes
into the answer.

Who prepares the guides?

RentQuarry publishes its own educational guides and software examples. The current byline identifies the organization, not an individual licensed adviser. We have not appointed an independent professional reviewer. We do not imply credentials or firsthand investment experience we have not documented.

Questions or corrections: contact the RentQuarry team. Account and privacy details are described in Privacy & terms.

What is a fact, and what is an assumption?

Listing information is source-reported and dated. Asking rent is an advertised offer, not a signed lease or an appraisal. Source gaps, conflicts, incomplete pages and unknown expenses remain visible. A property with missing evidence is not automatically a bad investment.

Our guides and public calculator use hypothetical homes, rents and financing. They are teaching examples, never real listings or current quotes. Review dates describe actual editorial or arithmetic review; we do not change them just because a page is rebuilt.

How the public calculator works

1. Scheduled rent is reduced for vacancy and collection loss.
2. Operating costs include property tax, insurance, HOA, owner utilities, administration, other owner costs, management, repairs and leasing.
3. Debt uses a fully amortizing 30-year fixed payment, or zero debt for a cash purchase. Taxes and insurance are listed separately, so the debt line excludes escrow.
4. A capital-replacement reserve is subtracted after planning NOI and debt payments.
5. Starting cash includes down payment, closing costs, make-ready work and the displayed liquidity convention. Annual cash-on-cash divides 12 times monthly cash flow by that total.

Management uses collected rent; repairs and capital reserves use scheduled rent. Leasing averages a rent-based fee over the stated turnover interval. This is a stabilized monthly average, not a month-by-month cash budget. Income taxes, future appreciation and sale proceeds are excluded.

The browser calculator is separate from the signed-in Python scenario engine. Both use deterministic code. Automated parity tests compare the browser's published examples with Python and independent high-precision arithmetic. Passing those tests does not verify a listing, financing availability or future rent.

What the workspace adds

The signed-in workspace offers dated listing leads, private saved scenarios and deeper downside comparisons. Collection can be partial, capped or paused; it is not a complete national inventory. Source observations older than eight days are withheld. Unknown existing tenant rent cannot be replaced with a market assumption and presented as current cash flow.

Nationwide planning is before income tax. The separate California illustration has a limited property/residency scope; deductions may be restricted or delayed. It is not a completed tax return. Inspections, legal rental permission, insurance, lender terms, school assignments and current leases need independent evidence.

Review and corrections

The original five guides were reviewed October 8, 2026. The additional decision examples and browser calculator were prepared November 11, 2026. Their numerical results are checked by automated tests. Primary references support relevant distinctions; they do not establish property-specific facts. No independent professional review is claimed.

We correct material errors when supported, preserve the distinction between changed assumptions and corrected arithmetic, and keep historical private analyses separate from current examples.