I Pay $187 a Month in PMI on Purpose and My Accountant Told Me to Stop Being Embarrassed
Everyone told me a 20% down payment was non-negotiable. Instead I put 10% down on a $340,000 house, kept $34,000 liquid, and deployed it into my business at a return that makes the PMI premium look like a rounding error. This is the math I ran, the math I got wrong the first time, and when this strategy actually fails.
The number on the loan estimate was $187.42 a month, and the loan officer said it like an apology. "And of course you'll want to avoid the PMI, most people put the full twenty down." I had $72,000 in savings. Twenty percent down on the $340,000 house was $68,000 plus closing costs, which meant approximately $4,000 left over, which meant my landscaping business, three crews and a 2016 F-250 with 190,000 miles on it, would be one broken transmission away from stopped.
I asked her to print both scenarios instead. She sighed. I have reckoned about that sigh alot since.
the math that made the sigh look silly
Scenario one: $68,000 down, no PMI, $61,000 mortgage balance difference be damned, savings near zero. Scenario two: $34,000 down, PMI at $187 a month, $34,000 liquid. The PMI cost me $2,249 a year. The alternative cost was the opportunity on that same $34,000. In March 2024 I used $28,000 of it to buy a used enclosed trailer, mowers, and a second crew's worth of equipment for the spring season. That crew grossed $61,000 that year at about a 38% margin, call it $23,000 in profit on $28,000 deployed.
a price, not a moral failing
I am not gonna pretend that return is normal or repeatable. What I will defend is the comparison itself. People treat PMI as a moral failing instead of a price. It has a price. My price was $2,249 a year for the option to keep working capital inside a business that earns more than the approximately 4.5% a money market fund was paying. If the business earns nothing, PMI was a bad bet. If it earns what it earned, refusing PMI would have been the expensive move dressed up as the responsible one.
the part I got wrong the first time
My first spreadsheet forgot three things. First, the PMI on a conventional loan is not just the monthly premium; my lender also charged 0.125% higher on the rate for the 90% LTV tier, about $35 a month. Real all-in cost: approximately $267 a month, $3,204 a year. The business still cleared it, but the honest number changed the conversation. Second, PMI is not automatically cancellable the day you hit 20% equity; on my note it required a written request at 78% scheduled amortization for auto-termination, and a current value-based request sooner, which meant either an appraisal or a broker price opinion at my lender's discretion. Third, and this one stung, the higher loan balance meant I crossed into a slightly worse rate tier that added $19 more. All in, keeping $34,000 liquid cost me about $321 a month. I would make that trade again tomorrow, but I made it with bad math the first time and got lucky that the business was strong.
when this strategy genuinely fails
I have now watched two friends try this and get hurt, so let me name the failure modes. Friend one kept the cash for "flexibility" and it sat in checking for two years earning nothing while he paid PMI for nothing. The strategy requires the capital to actually work somewhere. Friend two ran it, then the business had a bad year, and she was simultaneously carrying PMI and a business loss, the worst of both worlds, with a 401k loan as the emergency exit. If your income depends on the same bucket of risk as your "keep the cash" plan, you don't have a plan, you have concentration.
two lenders, two premiums
Something else I absorbed too late: PMI premiums vary enormously between lenders for the same borrower and the same LTV. A year into the loan I checked two competitors' quotes for a friend at the exact same 90% tier and the monthly MI quotes differed by more than $60. Same credit profile, same price band. Nobody shops the MI line cuz its presented as a fixed law of nature on the loan estimate. It's a product. It has a market.
naming where the cash goes
The honest framework is boring. Price the PMI including the rate tier penalty, not just the line item. Name in writing where the retained cash goes and what it earns. And decide your exit date, cuz on my loan, requests for removal based on current value need the balance at or under 80% of a supported value, and I have a calendar reminder for March 2027 to ask for exactly that. My accountant, when I confessed the arrangement like a sin, said something I wrote on a sticky note: "PMI is a financing decision. Shame is not a financial instrument."
what I'd price differently today
One more thing worth writing down. When I priced the trade in 2024, I never once compared the PMI premium against simply investing the extra $34,000 in a boring index fund, because the comparison everyone runs is PMI versus down payment, full stop. That framing is rigged in favor of the sizable down payment. The honest comparison is three-way: PMI cost, business return, market return, all net of taxes and risk. Run that way, the decision gets closer than my back-of-napkin version suggested, and in a flat year for the business it might even flip. The strategy isn't "skip the down payment." It's "know your alternative return before you let anyone sigh at your loan estimate."
the trailer behind the house
The trailer with the second crew's mowers is parked behind the house now. My daughter drew a logo on its back door in chalk paint. Every month the statement shows a $187.42 charge with no other purpose than having cost me money, and every April the crew it snagged earns that back by approximately the second week of the season. The sigh at the closing table was free. The math wasn't.