How Much Does PMI Cost Per Month on a $300K Loan?
You’re buying a $300,000 home, putting less than 20% down, and there’s a line item on your loan estimate you can’t quite decode: PMI. The lender quotes a monthly number, but where did it come from — and is it fair?
Here’s the straight answer: on a $300,000 loan, PMI typically costs between $75 and $375 per month. That’s a huge range, and where you land in it comes down mostly to one thing: your credit score. Let’s break it down completely.
PMI in One Paragraph
PMI (private mortgage insurance) protects your lender — not you — if you stop paying your mortgage. Conventional lenders require it whenever you put down less than 20%, because a smaller down payment means the lender takes more risk. PMI generally costs 0.3% to 1.5% of your original loan amount per year, divided into twelve monthly payments. It’s not forever: you can request cancellation at 20% equity, and it drops off automatically at 78% of the original value.
The Monthly Cost Table: $300K Loan by Credit Score
Your credit score is the single biggest driver of your PMI rate. Here’s what the monthly cost looks like on a $300,000 loan at typical rate ranges (illustrative — your lender’s exact pricing varies):
| Credit score band | Typical annual PMI rate | Monthly PMI on $300K loan |
|---|---|---|
| 760+ (excellent) | 0.30%–0.40% | $75–$100 |
| 740–759 | 0.40%–0.55% | $100–$138 |
| 720–739 | 0.55%–0.70% | $138–$175 |
| 700–719 | 0.70%–0.90% | $175–$225 |
| 680–699 | 0.90%–1.10% | $225–$275 |
| 660–679 | 1.10%–1.30% | $275–$325 |
| 620–659 | 1.30%–1.50% | $325–$375 |
Look at that gap: a buyer with excellent credit pays $75/month while a buyer at 640 pays $375 — five times more — for the exact same loan. This is why financial advisors obsess over credit scores before a home purchase. A 60-point score improvement can literally save you $200 a month.
What Else Changes Your PMI Cost
Credit score leads, but three other factors move the number:
1. Down payment size. PMI is priced in tiers. Putting 15% down costs noticeably less in PMI than putting 5% down, even with the same credit score — the lender’s risk is lower. Every extra 5% down typically shaves a meaningful chunk off the monthly PMI.
2. Loan type. These numbers are for conventional loans. FHA loans don’t technically charge “PMI” — they charge MIP (mortgage insurance premium), which works differently: an upfront fee plus monthly payments that, in most cases, last for the life of the loan unless you refinance. VA and USDA loans have their own fee structures with no monthly PMI at all.
3. Property and occupancy. A single-family home you live in gets the best PMI pricing. Condos, multi-unit properties, investment properties, and second homes all carry higher PMI rates — sometimes dramatically higher.
The Total Cost Over Time (This Is the Eye-Opener)
Monthly numbers feel abstract. Let’s look at what PMI costs over the years on that $300K loan, assuming you drop it once you hit 20% equity (roughly 7–8 years with normal payments at typical rates):
| Monthly PMI | Paid over ~7 years | Paid over ~8 years |
|---|---|---|
| $100 (great credit) | ~$8,400 | ~$9,600 |
| $175 (good credit) | ~$14,700 | ~$16,800 |
| $275 (fair credit) | ~$23,100 | ~$26,400 |
| $375 (lower credit) | ~$31,500 | ~$36,000 |
A buyer with weaker credit can pay $25,000+ more in PMI than a buyer with excellent credit — for the same house and the same loan amount. Let that sink in before you decide your credit score is “good enough.”
The flip side: PMI is temporary. Unlike the FHA’s monthly MIP (which usually lasts the life of the loan), conventional PMI ends. Every extra principal payment shortens its life.
How Lenders Actually Quote Your PMI (And Why You Should Compare)
Here’s something most buyers don’t realize: PMI pricing varies from lender to lender. Lenders buy PMI from private mortgage insurance companies, and different lenders use different insurers with different rate cards. Two lenders can quote the same buyer, same loan, same credit score — and come back with PMI figures $30–$50 apart per month.
That’s $400–$600 a year for literally the same product.
This is why you get Loan Estimates from at least three lenders. Everyone comparison-shops the interest rate; almost nobody comparison-shops the PMI line. When you compare offers, look at the total monthly payment — principal, interest, taxes, insurance, and PMI together. A lender with a rate 0.125% higher but $60/month cheaper PMI can easily be the better deal.
Also check your Loan Estimate’s “Projected Payments” section to see exactly how the PMI is disclosed. If a low-down-payment quote seems to be missing PMI entirely, ask the loan officer directly — it should be there, and its absence is a red flag, not a bargain.
4 Ways to Pay Less PMI
Raise your credit score before you apply. Even crossing one band — say 715 to 725 — can cut $25–$50/month. Pay down credit card balances (utilization matters enormously), don’t open new accounts, and don’t close old ones before applying.
Put down a little more. If you’re at 8% saved and stretching to 10% or 12% is possible, the PMI savings plus the smaller loan often beat keeping that cash in savings earning 4%.
Ask about lender-paid PMI. Some lenders will cover the PMI themselves in exchange for a slightly higher mortgage rate — often 0.125% to 0.25% higher. This can win if you’ll sell or refinance within 5–7 years, since the higher rate disappears when the loan does but monthly PMI wouldn’t have.
Consider a piggyback loan. An 80-10-10 structure (80% first mortgage, 10% second loan, 10% down) avoids PMI entirely. The second loan’s rate is higher, so do the full comparison — but for some buyers it’s cheaper overall.
Curious what PMI adds to your specific payment? A free PMI calculator lets you enter your loan amount, down payment, and credit band to see the monthly cost instantly.
FAQ
Is PMI calculated on the loan amount or the home price?
The loan amount. PMI is a percentage of what you borrow, not what the home costs. On a $300,000 home with 10% down, PMI is calculated on the $270,000 loan — which is one small reason a bigger down payment does double duty.
Can my PMI payment go up after closing?
Generally no — your PMI rate is locked at closing based on your credit profile and loan terms at that time. It won’t rise. It can only go down (if you refinance into a better rate/score band) or disappear (when you cancel it).
Do I pay PMI if I put exactly 20% down?
No. 20% down is the magic line — at exactly 20% down (80% loan-to-value), conventional lenders don’t require PMI at all. Even 19% down triggers it, which is why buyers so often stretch for that last percent.
How is PMI different from homeowners insurance?
They’re completely different products that confusingly appear near each other on your statement. Homeowners insurance protects you (fire, theft, storms). PMI protects the lender (you defaulting). You need homeowners insurance no matter your down payment; PMI only exists below 20% down.
Will PMI show up on my loan estimate?
Yes — lenders must disclose it. Look for it in the “Projected Payments” section of your Loan Estimate as part of the mortgage insurance line, and in the closing disclosure. If a lender’s quote seems to ignore PMI on a low-down-payment loan, ask why — it should be there.
Bottom line
On a $300,000 loan, expect PMI to cost roughly $75–$375 per month, with your credit score deciding where you land. Great credit keeps it near $100; weaker credit pushes it toward $300+. It’s temporary — plan to cancel it at 20% equity — but the total runs into the thousands, so it’s worth every effort to nudge your score up or your down payment up before you lock in. Know your number before closing day, not after.
