Do I Really Need 20% Down, or Is That a Myth?

It's a myth. No US mortgage program requires 20% down. Conventional loans go to 3% for qualifying buyers, FHA to 3.5%, VA and USDA to 0%, and even Jumbo programs commonly go to 5–10% down for well-qualified borrowers. The 20% number comes from one place only: that's the threshold at which Conventional loans don't require private mortgage insurance (PMI). The right question isn't "do I have 20%" — it's "is paying mortgage insurance for a few years worth getting into the house sooner instead of renting while I save." For most buyers in an appreciating market, the answer is yes.

The handbook view (what the rules actually say)

Every major US mortgage program has a minimum down-payment rule well below 20%. Here is what each program's rulebook actually says:

• Conventional 3% (HomeReady): 3% minimum down on a 1-unit primary residence for qualifying first-time buyers or low-to-moderate-income buyers (income at or below 80% of area median income for HomeReady). Private mortgage insurance is required while loan-to-value (LTV) exceeds 80%. (Source: Fannie Mae Selling Guide B5-6-01, HomeReady Mortgage.)
• Conventional 3% (Freddie Home Possible): 3% minimum down on a 1-unit primary residence with similar income-eligibility requirements. PMI required above 80% LTV, falls off per the Homeowners Protection Act (HOPA). (Source: Freddie Mac Single-Family Seller/Servicer Guide, Chapter 4501 — Home Possible Mortgages.)
• Conventional 5% (standard): 5% minimum down on a 1-unit primary residence without the HomeReady/Home Possible income limits. PMI required above 80% LTV, removable per HOPA at 78–80% LTV. (Source: Fannie Mae Selling Guide B2-1.2-01 — LTV, CLTV, HCLTV Ratios.)
• FHA: 3.5% minimum down with a 580+ FICO; 10% down for 500–579. An upfront mortgage insurance premium (UFMIP) of 1.75% of the loan is financed in, plus a monthly MIP. With less than 10% down, monthly MIP runs for the life of the loan. (Source: HUD Handbook 4000.1, II.A.2 — Minimum Required Investment; and current HUD Mortgagee Letter on MIP rates.)
• VA: 0% down for eligible veterans and active-duty service members up to the full entitlement amount. No monthly mortgage insurance, but a one-time VA funding fee applies (waived for veterans with a service-connected disability rating). (Source: VA Lender's Handbook, Pamphlet 26-7, Chapter 2 — Veteran Eligibility and Entitlement; 38 CFR Part 36.)
• USDA Rural Development (Section 502 Guaranteed): 0% down for borrowers buying an eligible rural property within income limits. No PMI, but the program charges a 1% upfront guarantee fee plus a small annual fee. (Source: USDA Handbook HB-1-3555, Chapter 6 — Loan Purposes; Chapter 16 — Closing the Loan.)
• Jumbo: Above the FHFA conforming loan limit (Jumbo programs are non-agency, so minimums are set by the investor, not the rulebook). Many Jumbo programs go to 10% down for strong borrowers; some go to 5% down with reserve and FICO requirements. PMI may be required, or the program may price it into the rate. (Source: FHFA conforming loan limits at fhfa.gov; Jumbo program terms vary by wholesale investor.)

The plain-English translation

The 20% rule isn't a rule. It's a PMI threshold.

• You can buy a house with 0% down (VA or USDA, if you qualify), 3% down (Conventional HomeReady / Home Possible), 3.5% down (FHA), or 5–10% down (most other programs). The lender doesn't hand-wave you out of the office because you don't have 20%.
• The 20% number is the line above which Conventional loans don't require PMI. Below 20%, you pay PMI (Conventional) or MIP (FHA) until you build enough equity to remove it — or, on FHA with less than 10% down, until you refinance into Conventional.
• PMI is monthly, often a few tens to a couple hundred dollars depending on your credit score and loan size. It's real money, but it's not a barrier — it's a trade. You're trading some monthly cost for years of waiting to save 20% in an appreciating market.
• Conventional PMI auto-cancels by federal law once your balance hits 78% of the home's original value (per the Homeowners Protection Act, 12 USC §§ 4901–4910). You can also request cancellation at 80% on your own. FHA MIP with less than 10% down does not auto-cancel — you have to refinance out of FHA to escape it.
• For a buyer in an appreciating market, the cost of PMI for a few years is usually less than the cost of not being in the home — rent paid, home prices moving away, mortgage rates moving. The 20%-down advice was right in a flat 1980s market; it's rarely the math today.

Side-by-side: minimum down by program

The table is a guideline. PMI cost varies by FICO, loan size, and MI provider; FHA MIP rates are set by HUD and republished periodically; Jumbo terms vary by wholesale investor. The right move is to price two or three scenarios at the same loan amount and compare total monthly cost — not down-payment percentage in isolation.

Lender overlays — where the rules get tighter

The down-payment minimums above are the program floor. Individual lenders impose overlays on top — tighter rules than what the program rule requires:

• FICO floor overlays on low-down programs: HUD allows FHA at 580. Many retail lenders won't go below 620 or 640 for FHA. A wholesale investor network typically has options down to the handbook floor and occasionally lower with strong compensating factors.
• PMI partner pricing: Conventional PMI is provided by a small set of insurers (MGIC, Radian, Essent, National MI, Arch, Enact). Lenders don't always shop multiple providers, and the same borrower can get materially different PMI quotes from two lenders. Brokers usually have access to multiple PMI partners.
• Down-payment-assistance restrictions: Some retail lenders restrict which down-payment-assistance (DPA) programs they'll accept — even when the underlying loan program allows the DPA. This matters most for buyers using Conventional 3% or FHA with state/local DPA layered on top.
• Jumbo-investor minimums: Jumbo isn't a single program — each wholesale investor sets its own minimum down, reserve, and FICO requirements. A 10%-down Jumbo at one investor might require 20% down at another for the same borrower. Shopping multiple Jumbo investors is the only way to know.
• Reserve overlays: Many investors require 2–6 months of reserves (mortgage payments held in an account post-closing) for low-down loans. The program rule may not require reserves; the lender may.

Which lenders we actually use for this scenario

The 20% conversation is mostly a low-down conversation in disguise, which means the lender selection has to optimize for two things at once: PMI rate sheet and overlay sanity at the agency floor.

The first lender type is the wholesale investor with competitive BPMI pricing (BPMI = borrower-paid mortgage insurance, the standard monthly-premium structure). BPMI pricing varies meaningfully between lenders even though the agency program is identical, because each lender negotiates its own rate sheet with the MI companies (MGIC, Radian, Essent, National MI, Arch). This is the lever most borrowers don't know exists. Two borrowers with identical credit, identical LTV (loan-to-value), and identical loan amounts can pay materially different PMI at different lenders. The broker channel can see across multiple investor rate sheets; the retail desk only sees its own.

The second lender type is the wholesale investor that runs Conv 3% (HomeReady / Home Possible) cleanly without overlaying to 5%. That overlay is the most common reason a first-time buyer who qualifies for 3% Conventional ends up in 5% Conv or worse, FHA. The overlay exists because the lender's risk team doesn't want to touch the 3% LTV tier; the broker channel routes around it.

The third lender type is the FHA-friendly shop that handles 580-679 FICO files at the standard 3.5% MRI without a 620 overlay. Most lenders won't go below 620 on FHA even though HUD's floor is 580. If you're inside HUD's floor but the retail desk overlays to 620, the broker channel is your access path — that's a real, repeatable use case, not a marginal one.

The lender type I avoid for low-down conventional is the agency-only retail bank that prices PMI off a default rate sheet and never shops the MI companies for a better tier. Same Fannie program, materially worse PMI cost, no transparency into why. The borrower is paying a premium for the lender's incuriosity.

Real-world cases

I've seen this pattern plenty of times — borrowers walking in with “I'm saving for 20%” and walking out closing at 3% to 5% down because the math made the decision for them.

A composite that illustrates the typical path: first-time buyer in the Denver metro, mid-to-high 700s FICO, stable W-2 income, mid-six-figure target price. Has roughly enough cash to do 5% Conv with reserves left over, or could stretch to 10% and run reserves thin. Has been told by parents to wait until 20%. We run all three side by side — 5%, 10%, what the cash would do invested instead — and the 5% Conv path with BPMI removable at 80% LTV (per HPA, the Homeowners Protection Act of 1998) wins cleanly. PMI drops off in the projected 5-to-7-year window on a normal amortization-plus-appreciation curve. The cash that didn't go into the down payment stays earning market returns. The buyer doesn't wait the additional years it would take to save the bigger down payment, and they don't pay the appreciation premium on a house that costs more by the time they're “ready.”

Another pattern that recurs: veteran with full entitlement walking in for a “minimum 5% down” conventional because they've been told by a retail LO that VA is “complicated” or “sellers don't like VA offers.” VA is 0% down, no monthly MI (there's a one-time VA funding fee per chapter 3 of the M26-7 handbook, often rolled into the loan), and on a typical file the lifetime cost crushes the conventional alternative. The “complicated” framing usually means the retail LO either isn't VA-fluent or makes more comp on a different product. Broker-floor reality: VA is the workhorse for eligible vets, and the seller-friction story is mostly outdated retail folklore.

The composite I work to avoid is the borrower who comes in late in the buying timeline already locked into 20% mentally and emotionally — they've told family they're “doing it right,” they don't want to walk back the framing, and they're prepared to draw down savings and retirement to hit a number that the rulebook doesn't require. The math conversation is uncomfortable in that scenario, but it's the conversation that protects them.

How the big retail lenders typically handle this

Retail behavior on the 20% myth is structural, not malicious. A typical megabank LO is paid more on FHA than on Conventional for the same borrower and same loan amount — the comp grid (LO comp = loan officer compensation, regulated under TILA-RESPA but variable by lender) rewards them for putting a 680-credit borrower into FHA's life-of-loan MIP (mortgage insurance premium) instead of Conv 3% HomeReady where MI drops off at 80% LTV. The borrower never sees the comp grid; they see a recommendation that sounds neutral.

A typical retail bank that's not competitive on Conventional pricing will lean on its LOs to push FHA, because FHA is where their pricing is closer to market. That's not bad people; that's an org chart making predictable choices. The result is a steady flow of 680+ FICO first-time buyers getting put into FHA when Conv 3% with removable PMI would have been the long-term winner.

Retail pricing on low-down Conventional also tends to run a quarter to half a point worse than broker-channel pricing on the same profile, because the retail desk's overhead has to come out of somewhere, and on a sub-20% file the PMI shopping piece simply doesn't happen — the bank uses its house MI partner and that's the quote. The borrower never gets the broker comparison.

The structural fix isn't “trust your LO more.” It's “make sure your LO can show you the three paths side-by-side, with current rate, current MI, and total cost over the time you actually expect to hold the loan.” If your LO never asked whether you'd qualify for Conv 3%, you didn't get the comparison you deserved. That's the case for the broker channel — not a magic program, just access to the full menu and the comp structure to actually shop it.

A simple decision rule

For a buyer trying to decide how much to put down, the cleanest 30-second filter:

1. 1VA-eligible? Start at 0% down. Skip PMI entirely — the VA funding fee is usually cheaper than years of PMI.
2. 2Buying in a USDA-eligible rural area within income limits? Run USDA at 0% down side by side with FHA at 3.5%.
3. 3First-time buyer with 680+ FICO and at or below the HomeReady/Home Possible income cap? Conventional 3% with removable PMI usually beats FHA long-term.
4. 4FICO under 680 or higher DTI? Lead with FHA at 3.5%, but still get the Conventional 3%/5% quote on paper for comparison.
5. 5Have 20%+ in savings? You don't need to use all of it. Compare the monthly cost of 5% down + PMI against 20% down + no PMI, and weigh the difference against keeping the extra cash liquid for reserves, improvements, or other priorities.