PMI vs 20 Percent Down Comparison Calculator
Deciding between paying Private Mortgage Insurance (PMI) or putting 20% down is one of the most important financial decisions for homebuyers. Our PMI vs 20 percent down comparison calculator instantly shows the true cost difference between both options, considering your loan amount, interest rate, and timeline. See which strategy saves you more money over your mortgage lifetime.
How the Calculator Works
1. Enter your home price — the total purchase price 2. Select your down payment amount — either 10% (PMI required) or 20% (no PMI) 3. Enter your interest rate — current mortgage rate 4. Select your loan term — 15-year or 30-year 5. Get the full cost comparison — monthly payment, total interest, PMI cost, and break-even analysis
PMI vs 20% Down: Quick Comparison
| Factor | PMI Required (10% Down) | No PMI (20% Down) |
|---|---|---|
| Down Payment | 10% of home price | 20% of home price |
| Monthly PMI | 0.5%-1.5% of loan/year | $0 |
| Loan Amount | Higher (less equity) | Lower (more equity) |
| Interest Paid | Higher (larger loan) | Lower (smaller loan) |
| Monthly Payment | Higher (PITI + PMI) | Lower (PITI only) |
| Equity Build | Slower | Faster |
| Total Cost over Life | Higher | Lower (usually) |
Cost Comparison by Home Price ($400,000 example)
| Metric | 10% Down ($360K loan) | 20% Down ($320K loan) | Difference |
|---|---|---|---|
| Down Payment | $40,000 | $80,000 | -$40,000 upfront |
| PMI (1%/year) | $3,600/year ($300/month) | $0 | -$300/month while PMI active |
| Monthly Payment (P&I @ 6.5%) | $2,275 | $2,026 | -$249/month |
| Total Monthly (PITI + PMI) | ~$2,575 | ~$2,026 | -$549/month |
| Total Interest (30yr) | $459,000 | $409,360 | -$49,640 |
| Total PMI Paid (until 20% equity) | ~$10,800 | $0 | -$10,800 |
| Combined Extra Cost (PMI + interest) | ~$60,440 | Baseline | PMI costs ~$60K more |
When PMI Might Save You Money
PMI can be the better financial strategy if you meet these conditions:
1. You invest the difference — if you invest the $40,000 saved on the down payment at 7% annual return, it grows to $314,000 in 30 years, far exceeding the extra interest and PMI costs. 2. You plan to move within 5-7 years — PMI is typically required for 5-7 years until you reach 20% equity. If you sell before PMI ends, the upfront savings may outweigh the PMI cost. 3. Interest rates are high — at higher rates, the PMI cost becomes a smaller percentage of the total carrying cost. 4. You have high-interest debt — putting less down preserves cash to pay off high-interest debt first.
When 20% Down Is Better
The traditional 20% down approach wins when:
1. You plan to stay 10+ years — long-term interest savings outweigh upfront costs. 2. You don't have investment options — if you can't earn a return higher than your mortgage rate, you're better off paying down the mortgage. 3. You want lower monthly payments — no PMI means a permanently lower monthly obligation. 4. You want equity cushion — 20% equity protects you against market downturns and provides borrowing flexibility. 5. You're near the 20% threshold — if you're already at 15-18% down, pushing to 20% may be worth the small additional cost.
PMI Removal and Cancellation Rules
| Rule | Details |
|---|---|
| Automatic termination | PMI must be cancelled when your LTV reaches 80% based on the original amortization schedule |
| Request cancellation | Borrower can request PMI removal at 80% LTV with appraisal |
| Final termination | PMI must terminate at 78% LTV regardless of borrower request |
| Streamline refinance | FHA to conventional refi can eliminate PMI |
| Appraisal-based | New appraisal showing 20%+ equity allows PMI removal |
| Timeline (typical) | 5-7 years for PMI to reach 78% LTV on a standard amortization |
PMI Cost by Credit Score
| Credit Score | PMI Rate (Annual) | Monthly PMI on $360K Loan |
|---|---|---|
| 760+ | 0.25%-0.50% | $75-$150 |
| 720-759 | 0.50%-0.75% | $150-$225 |
| 680-719 | 0.75%-1.00% | $225-$300 |
| 640-679 | 1.00%-1.25% | $300-$375 |
| 620-639 | 1.25%-1.50% | $375-$450 |
Loan-to-Value (LTV) and Its Impact
| LTV | Down Payment | PMI Required? | Impact |
|---|---|---|---|
| 90% | 10% | Yes | Higher rate + PMI |
| 85% | 15% | Yes | PMI with smaller gap to removal |
| 80% | 20% | No | PMI-free from day one |
| 75% | 25% | No | PMI-free + better rate |
| 70% | 30% | No | PMI-free + rate buy-down |
Mortgage Rate Impact of PMI vs Larger Down Payment
Lenders often offer better interest rates when you put more down:
| Down Payment | Typical Rate Difference | Monthly Rate Savings |
|---|---|---|
| 10% | Base rate (6.5%) | Baseline |
| 15% | -0.125% (6.375%) | ~$28/month |
| 20% | -0.25% (6.25%) | ~$56/month |
| 25% | -0.375% (6.125%) | ~$84/month |
Break-Even Analysis
| Home Price | Annual Savings (No PMI) | Upfront Cost (Extra Down) | Break-Even Year |
|---|---|---|---|
| $300,000 | $1,800 | $30,000 | Year 17 |
| $400,000 | $2,400 | $40,000 | Year 17 |
| $500,000 | $3,000 | $50,000 | Year 17 |
| $600,000 | $3,600 | $60,000 | Year 17 |
> Note: Break-even year assumes PMI is removed after 7 years. If you stay longer, 20% down saves significantly more.
Advanced: PMI Tax Deductibility
| Tax Year | PMI Deductibility |
|---|---|
| 2021-2025 | PMI deductible as mortgage insurance premium |
| 2026+ | Deductibility may expire (check current tax law) |
| Threshold | Deduction phases out at higher incomes |