Fifteen, twenty, twenty-five, thirty. Those four percentages cover the down payment on nearly every rental-property purchase in the United States — and the spread between them is not random. It comes down to three things: the loan program, the property type, and how the deal is underwritten.

Most buyers carry a single number in their heads ("25% for rentals") and get surprised at the closing table. And unlike a primary residence, where down payment tiers are published and predictable, investment-property rules bend around lenders, deals, and the paper trail behind your cash. Here are six myths that cause most of those surprises, each corrected with what programs actually allow.

A note on scope: these myths live mostly in US residential rental financing — one- to four-unit properties — where program rules bend with the borrower and the deal. Larger commercial transactions follow their own logic.

Myth 1: "You always need 25% down for a rental."

Reality: 25% is common, not universal. Conventional investment financing for a single-family rental commonly lands in the 15–25% range depending on credit and the lender's overlays, and multi-unit properties of two to four units typically push toward the top of it. DSCR rental programs commonly start around 20–25%, with some allowing less for particularly strong files. The floor exists — but it moves with the borrower and the property, not just with the label "investment." As a quick reference: the strongest single-family files commonly start in the 15–20% range, two- to four-unit properties commonly require 25%, and fix-and-flip lenders size against the after-repair value rather than a traditional down payment percentage.

Myth 2: "The down payment is the only cash you need."

Reality: the down payment is the entry fee, not the budget. The full cash picture usually includes:

  • Closing costs: commonly 2–5% of the purchase price
  • Loan points: commonly one to two on investment loans
  • Reserves: typically two to six months of payments, more as your property count grows
  • Repairs and re-leasing costs waiting right after closing

On a $400,000 purchase at 20% down, the down payment is $80,000 while total cash to close commonly runs $90,000 or more. Investors who spend to their last dollar at closing are the ones a single vacancy hurts the most.

Myth 3: "A bigger down payment always buys a much lower rate."

Reality: pricing improves in steps, not continuously, and the steps are usually modest. The bigger levers are credit-score tier, the property's coverage ratio, and loan structure. Moving from 20% to 25% down can sharpen your pricing somewhat; moving from a 680 mid-score to a 740 mid-score does more. This is why draining reserves to force a larger down payment is often the wrong optimization — the money frequently does more for the deal sitting in reserve than sitting on the table. As a rough ordering: improving your mid-score by 40 points typically moves pricing more than adding five percentage points of down payment. When pricing steps do appear, they tend to be smaller than borrowers expect — rarely worth draining reserves over.

Myth 4: "You can only use your own cash."

Reality: programs differ on fund sourcing, and several structures bring other people's money in legitimately — co-borrowers and LLC partners contributing capital, seller credits negotiated into the purchase contract, and second-position financing from private sources. Some agency programs restrict gift funds on investment properties, so sourcing rules must be checked for the specific program. But the blanket rule "only your own cash" is not how most investors actually fund deals. Lenders will document the source — seasoned accounts, executed agreements, the contract itself — so the money has to be real and traceable, not verbal. Pooling capital through an LLC is especially common once deals pass the $500,000 mark, where shared exposure keeps any single investor's risk manageable.

Myth 5: "Twenty percent down is always riskier than thirty."

Reality: to a lender, leverage reads together with coverage. A loan at 20% down on a property with 1.30 DSCR is a stronger file than one at 30% down with 1.05 coverage — because cash flow services the debt while the down payment only reduces exposure. This is also why some deals "need" 25% down not by rule but by math: the coverage threshold effectively requires it. Put numbers to it: the gap between 20% and 25% down on a $400,000 property is $20,000 of cash, and on borderline deals that is often the exact money that pulls coverage over the line. More down means more room in the deal's cash flow and often better terms; less down means more deals per dollar if you can tolerate the variance. Neither is better in a vacuum. Underwrite the downside with the smaller number: one extended vacancy plus one major repair is what turns thin coverage into a problem.

Myth 6: "Less down always means better returns."

Reality: leverage magnifies outcomes in both directions, and run the numbers on one example. Take a $400,000 duplex renting for $3,800 per month with taxes and insurance of $750. At 20% down, the loan is $320,000; principal and interest runs roughly $2,240 at a representative 7.5% rate for illustration, total payment about $2,990, and coverage lands near 1.27 — comfortable. At 15% down, principal and interest rises to roughly $2,380 and coverage slips to about 1.21 — still fundable on some programs, but with a thinner cushion and likely higher pricing. The extra money down bought margin and terms; the smaller down payment bought capacity. The right answer depends on how much variance you can absorb, not on a rule of thumb. If you compare leverage options, compare them on cash-on-cash return and coverage together — the pair, not either one alone. And remember the opportunity side: the cash you keep with a smaller down payment can fund the next property — or sit still, which is its own cost.

The Week Before Your Next Offer

  • Get pre-approved on a full file so the lender — not a guess — sets your down payment number.
  • Model total cash: down payment, 3–5% closing costs, reserves, and any immediate repairs.
  • Ask what assets count toward reserves; retirement accounts and available credit lines sometimes count, which lowers the cash you actually need at closing.
  • Re-check the reserves figure after down payment and closing costs are subtracted; if it is thin, adjust the deal plan, not the spreadsheet.
  • If coverage is tight, solve it with price, rent, or structure before solving it with more cash.
  • Ask two lenders to structure the same deal; down payment "requirements" sometimes move when the structure does.

Down payment questions get simpler when someone runs the actual numbers with you instead of quoting a rule of thumb. Share your next property's price, rent, and rough finances with Tesni, LLC, and we will show you what the deal actually needs.