PMI vs Larger Down Payment: What Makes Financial Sense?
"Don't buy a house until you have 20 percent down" is one of the most repeated rules in personal finance. It is also one of the most misleading. The 20 percent rule exists because of private mortgage insurance, or PMI, which lenders charge when your down payment is smaller. PMI feels like a penalty, and avoiding it sounds like the smart move. But waiting years to save a larger down payment carries its own costs — rising home prices, lost equity, higher interest rates, and the opportunity cost of staying out of the market. This guide breaks down the real math of PMI versus a larger down payment so you can make the decision that actually saves you money.
What PMI Actually Costs
Private mortgage insurance is required by lenders any time you put down less than 20 percent on a conventional mortgage. PMI protects the lender (not you) in case you default, and the cost is added to your monthly mortgage payment. The exact rate depends on three main factors:
- Loan-to-value (LTV) ratio — The smaller your down payment, the higher the PMI rate.
- Credit score — Higher credit scores get lower PMI rates. The difference between a 620 and a 760 score can double or triple your premium.
- Loan type and term — 30-year loans have higher PMI than 15-year loans, and adjustable-rate mortgages sometimes carry higher rates than fixed.
PMI rates typically range from 0.3 percent to 1.5 percent of the loan amount per year. For most borrowers in 2026, the realistic range is 0.5 percent to 1.0 percent. That works out to $40 to $85 per month for every $100,000 of loan balance.
How Much PMI Adds to Your Monthly Payment
The best way to grasp PMI is to see what it actually adds to your monthly mortgage payment at different down payment percentages. Here is the cost on a $400,000 home for a borrower with a 740 credit score and a 30-year fixed loan at 6.5 percent APR.
| Down Payment | Loan Amount | Approximate PMI Rate | Monthly PMI | Total Monthly P&I + PMI |
|---|---|---|---|---|
| 3% ($12,000) | $388,000 | 0.95% | $307 | $2,759 |
| 5% ($20,000) | $380,000 | 0.85% | $269 | $2,671 |
| 10% ($40,000) | $360,000 | 0.55% | $165 | $2,440 |
| 15% ($60,000) | $340,000 | 0.40% | $113 | $2,262 |
| 20% ($80,000) | $320,000 | 0.00% | $0 | $2,022 |
A 10 percent down payment adds about $165 per month in PMI, while a 5 percent down payment adds $269. These are not trivial sums, but they are also not deal-breakers for most buyers. The question is whether they are higher or lower than the costs of waiting.
PMI Removal Rules
The most important fact about PMI: it is not permanent. Federal law (the Homeowners Protection Act) requires lenders to remove PMI under specific conditions, and savvy borrowers can accelerate the process.
Automatic Termination at 78 Percent LTV
Your lender must automatically cancel PMI when your loan balance falls to 78 percent of the original purchase price, assuming you are current on payments. Based purely on scheduled amortization (no extra payments), here is roughly how long that takes:
- 3 percent down: about 11-12 years
- 5 percent down: about 9-10 years
- 10 percent down: about 6-7 years
- 15 percent down: about 3-4 years
Borrower-Requested Removal at 80 Percent LTV
You can ask your lender to drop PMI when your balance reaches 80 percent of the original price. This shaves a few months off the automatic timeline. You generally need to be current on payments and may need to certify that you have no second liens on the property.
Removal Based on Current Appraised Value
Many lenders will remove PMI if a new appraisal shows your home value has risen enough to put you below 80 percent LTV based on the current value rather than the original price. This is the fastest path in a rising market. You typically need to wait at least two years and pay $400 to $600 for the appraisal, but it can save thousands.
Refinancing
If interest rates have dropped or your home value has risen significantly, refinancing into a new conventional loan with the new appraised value can eliminate PMI. This works best when rates have come down enough to also lower your principal-and-interest payment.
Opportunity Cost of Waiting to Save 20 Percent
Saving an extra 10 to 17 percent of a home's price takes most buyers two to four years. During those years, several costs pile up that rarely make it into the "wait until you have 20 percent" advice column.
Cost 1: Home Price Appreciation
Historically, US home prices have risen about 4 percent per year on average. On a $400,000 home, that is roughly $16,000 in additional cost per year you wait. Save an extra $20,000 over two years and the home you wanted now costs $432,640. Your "savings" disappeared.
Cost 2: Higher Interest Rates
Mortgage rates fluctuate. The buyer who locks in 6.5 percent today might face 7.5 percent two years from now. On a $360,000 loan, a 1 percent rate increase adds about $250 to the monthly payment for the entire 30-year term — far more than the PMI you avoided.
Cost 3: Continued Rent Payments
Every month you rent is a month you build zero equity. If your rent is $2,200 per month, two years of waiting equals $52,800 spent on rent with nothing to show for it. By contrast, the early years of a mortgage payment may only build a few thousand in equity, but they also lock in your housing cost.
Cost 4: Lost Tax-Advantaged Equity Buildup
Home equity built through principal payments is effectively tax-free, since you have already paid tax on the dollars and gains under $250,000 ($500,000 for couples) are exempt at sale. Waiting delays this tax-advantaged wealth-building.
Break-Even Analysis: PMI vs Waiting
Let us compare two real-world scenarios. Buyer A buys today with 10 percent down and pays PMI. Buyer B waits two years to save the additional 10 percent, then buys with 20 percent down. Assume 4 percent annual home price appreciation, 6.5 percent mortgage rate today, 7.0 percent two years from now, and $2,200 monthly rent for Buyer B during the waiting period.
| Item | Buyer A: Buy Now (10% down) | Buyer B: Wait 2 Years (20% down) |
|---|---|---|
| Home price at purchase | $400,000 | $432,640 |
| Down payment | $40,000 | $86,528 |
| Loan amount | $360,000 | $346,112 |
| Mortgage rate | 6.5% | 7.0% |
| Monthly P&I | $2,275 | $2,303 |
| Monthly PMI (avg over 6 yrs) | $165 | $0 |
| Total PMI paid before removal | ~$11,880 | $0 |
| Rent paid during 2-year wait | $0 | $52,800 |
| Equity at end of year 6 | ~$108,000 | ~$70,000 |
Even after paying $11,880 in PMI, Buyer A is roughly $80,000 ahead of Buyer B by year six. Buyer B's larger down payment and rate avoidance simply cannot make up for the lost time and the rent paid while waiting.
The break-even only flips in favor of waiting when home prices are flat or falling and rents are unusually low. In most US metro areas in 2026, the math overwhelmingly favors buying sooner with PMI.
First-Time Buyer Considerations
First-time homebuyers are uniquely positioned to benefit from buying earlier rather than waiting. Here is why:
- Low down payment programs. Conventional loans accept as little as 3 percent down for first-time buyers. FHA loans require 3.5 percent down. VA and USDA loans require zero down. There is rarely a financial reason to wait until you have 20 percent.
- State and local down payment assistance. Most states offer first-time buyer grants, forgivable loans, or matched savings programs that can cover thousands of dollars. These programs disappear once you no longer qualify as a first-time buyer.
- Lender-paid PMI options. Some lenders offer "no PMI" loans by absorbing the cost into a slightly higher interest rate. This can be a cleaner monthly payment, although it locks the cost into your loan permanently rather than letting you remove it later.
- Tax-advantaged retirement account withdrawals. First-time buyers can withdraw up to $10,000 from an IRA penalty-free for a home purchase. This can help bridge a small down payment gap.
- Building credit history. Owning a home and making on-time mortgage payments is one of the fastest ways to build a strong credit profile, which lowers your borrowing costs across the board.
The biggest mistake first-time buyers make is assuming the 20 percent rule applies to them. For most buyers in stable or rising markets, the rule is actively counterproductive.
PMI vs Lender-Paid Mortgage Insurance (LPMI)
Some lenders offer a "no PMI" option called Lender-Paid Mortgage Insurance, or LPMI. Instead of charging you a separate PMI line item, the lender absorbs the insurance cost and bumps your interest rate by about 0.25 to 0.5 percent. Here is how the two options compare on a $360,000 loan:
| Option | Interest Rate | Monthly P&I | Monthly PMI | Total Monthly Cost | Cost After PMI Removal |
|---|---|---|---|---|---|
| Standard PMI | 6.50% | $2,275 | $165 | $2,440 | $2,275 |
| LPMI (no PMI line) | 6.875% | $2,365 | $0 | $2,365 | $2,365 |
LPMI looks slightly cheaper on a monthly basis at first, but the higher rate is locked in for the life of the loan. Standard PMI drops off after 6-10 years, after which the standard-PMI borrower pays $90 per month less for the next 20+ years. Over a 30-year hold, standard PMI is almost always cheaper unless you plan to refinance or sell within a few years. LPMI makes the most sense for buyers who expect to refinance quickly when rates drop.
When You Should Wait for 20 Percent
There are a few specific situations where waiting and saving more is genuinely the better move:
- You are in a flat or declining housing market. If local home prices are not rising, the appreciation argument disappears.
- You can save aggressively in a short window. If you can hit 20 percent within 6-12 months thanks to a bonus, inheritance, or lifestyle change, the math favors waiting.
- Your credit score will improve significantly. If you can move from 680 to 760 in a year, the interest rate savings can outweigh PMI costs.
- Your housing costs are unusually low. If you live with family or pay below-market rent, the cost of waiting drops dramatically.
- Your job is unstable. Buying with a small down payment leaves little cushion. If layoffs are likely, waiting and building reserves first is smarter.
The Bottom Line
PMI is not a punishment, and avoiding it should not be your top priority. It is a temporary, removable expense that, in most markets, costs less than waiting years to save a larger down payment. For first-time buyers in particular, getting into a home sooner with a 5-10 percent down payment is almost always a better financial outcome than renting for two more years to avoid a few thousand in PMI.
The right answer depends on your specific numbers: home price, local appreciation, current mortgage rates, your savings rate, your credit profile, and your monthly budget. Use the mortgage calculator to model the full payment including PMI at your target down payment, the down payment calculator to figure out how much you actually need at different LTV ratios, and the home affordability calculator to make sure the total payment fits your income comfortably. With the actual numbers in front of you, the PMI versus waiting decision usually answers itself.