How Much a First-Time Buyer Pays Monthly on a $350K Conventional Loan

The Quick Read: The monthly payment on a $350K conventional loan is more than principal and interest. It has up to five parts: principal, interest, property taxes, homeowner’s insurance and mortgage insurance, which typically applies when the down payment is smaller than a conventional lender’s threshold. Association dues can be a sixth. The loan amount, the rate and the term set the first two. The property and the down payment set the rest. This article treats $350K as the loan amount and shows what moves the total, without quoting a payment dollar figure.

What Does “$350K” Actually Mean?

It can mean two different things. A $350K purchase price is not a $350K loan. A $350K loan amount is not a $350K home.

Say a buyer puts 3% down on a home. The loan is 97% of the price, and the price is higher than $350K. Say a buyer puts 20% down on a home. The loan is 80% of the price, and again the price is higher. So “a $350K loan” tells you the balance being financed. It doesn’t tell you the cost of the house, the cash needed at closing, or whether mortgage insurance applies. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.

Here is the part that trips up first-time buyers. Two buyers can both borrow $350K and have very different monthly payments. One put 3% down and carries mortgage insurance. The other put 20% down and doesn’t. The loan balance is identical. The payment isn’t. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.

A $350K balance also sits well inside the conforming loan limit that the Federal Housing Finance Agency sets each year. It is not a jumbo loan. It can be a standard conventional loan in any county.

What Goes Into the Monthly Payment?

The payment has four core pieces, plus two that depend on the file. The federal consumer-finance regulator calls principal, interest, taxes and insurance (PITI) the four basic elements of a monthly mortgage payment. Taxes and homeowner’s insurance often go into an escrow account.

Lenders qualify the buyer on all of it, not just the first two lines. Fannie Mae’s Selling Guide calls the underwriting version PITIA. It counts principal and interest, property and mortgage insurance, taxes, special assessments and association dues.

The fixed part is principal and interest. The rest moves. That is why the escrow portion of your payment can change from one year to the next while the loan itself doesn’t.

How Does the Down Payment Change the Payment?

Down payment drives the loan amount, and the loan amount drives everything else. On conventional purchases across the wholesale programs Lendmire works with, a first-time buyer on a one-unit primary residence with a fixed rate can go to 97% LTV, which is 3% down. A standard buyer goes to 95%, which is 5% down. Both are subject to lender guidelines and full file review.

Put less down and three things happen:

• The loan balance goes up, so principal and interest go up.
• Mortgage insurance applies because the loan is above 80% LTV.
• The cash needed at closing goes down. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.

Put 20% down and mortgage insurance doesn’t apply. The payment is lower per dollar of home price, but the buyer needs much more cash up front. That is the real trade-off. Neither choice is wrong. It depends on cash on hand and how much monthly room the buyer wants. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.

How Is a Conventional Loan Underwritten, Step by Step?

A file moves through the same mechanical steps every time. Knowing them tells you which documents to gather.

1. Principal and interest are set. The loan amount, the rate and the term decide this number. The rate is quoted on your Loan Estimate, not in an article.

2. Mortgage insurance is added if needed. Above 80% LTV, coverage is required on the portion above 80% of the property’s value. Fannie Mae sets coverage levels by LTV band in its Selling Guide. Those coverage levels are not your premium. The premium is a separate figure the insurer sets. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.

3. Taxes, insurance and dues are estimated. These vary by property. Most are collected through escrow.

4. The lender runs debt-to-income. DTI compares total monthly obligations to total monthly income. The new housing payment goes in, along with revolving payments, lease payments and installment debts with more than ten months left, per Fannie Mae’s DTI rules.

5. Credit and reserves are checked. The wholesale conventional programs start at a 620 decision score. The automated finding governs most files, with a total ratio ceiling of 50%. Manually underwritten loans use 36% or 45% with the reserve and score factors in Fannie Mae’s Eligibility Matrix.

6. The appraisal sets the value. On a purchase, the sales price and the appraised value both matter. LTV is built on the lower of the two. A low appraisal means a bigger down payment or a renegotiated price.

7. The Loan Estimate and Closing Disclosure show the final numbers. The Estimated Total Monthly Payment on the Loan Estimate adds principal and interest, mortgage insurance and estimated escrow.

Lenders may be stricter than Fannie Mae’s minimums, as long as they apply the rule consistently. That is called an overlay. Two lenders can look at the same borrower and answer differently.

What Does Mortgage Insurance Do to the Payment?

It adds a line to the payment whenever the loan is above 80% LTV. Published typical annual premiums run from 0.58% to 1.86% of the balance. That is a range, not a quote. Your premium depends on your credit score, your LTV and the coverage level. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.

Stronger credit and a larger down payment generally mean a smaller premium. A 3% down buyer with a lower score sits at the expensive end. A 5% down buyer with strong credit sits lower.

Conventional mortgage insurance is not permanent. Under the Homeowners Protection Act, the borrower may request cancellation when the balance is scheduled to reach 80% of the home’s original value. The borrower needs a good payment history, no subordinate liens and no decline in value. The servicer must terminate it automatically at 78%. The CFPB describes both steps, plus a midpoint-of-term standard. The request has to be in writing, and the lender may ask for evidence that value hasn’t dropped, which can mean a new appraisal at the borrower’s expense.

So the payment you start with is not the payment you keep. Mortgage insurance drops off. Taxes and insurance drift. Principal and interest stay put.

Where Do the Rules Bend?

Several edge cases change the math. Each one matters for a first-time buyer.

HomeReady and Home Possible. These low-down-payment programs carry an income limit of 80% of area median income. Pricing and available terms vary by lender, borrower profile, property type, and full underwriting review. The home must be a principal residence. Mortgage insurance can be cancelled once equity reaches 20%. The income cap means a stronger earner may not fit the program.

Occupancy. Leverage drops as the property moves away from a primary home. Two- to four-unit principal residences go to 95%. Second homes go to 90%. Investment property is lower. For a first-time buyer living in the home, the one-unit primary residence rules apply.

Credit events. Agency waiting periods apply after a bankruptcy or foreclosure. They run four years from a chapter 7 discharge, seven years from a foreclosure and four years from a short sale or deed-in-lieu. Documented extenuating circumstances can shorten them.

New debt before closing. A new car loan between approval and closing can break the file. If the lender pulls a new credit report after the first decision, the loan is re-underwritten. Don’t finance anything until the keys are in hand.

Adjustable rates. Under manual underwriting, an adjustable-rate loan needs a 640 score instead of 620.

Association dues. Dues and special assessments count in the payment. A condo with high dues cuts into buying power, even when the loan amount stays the same.

How Do You Know Whether the Payment Fits?

Start with DTI, but don’t stop there. Lenders look at the housing payment plus other monthly debts against gross income. A 50% automated ceiling is the outer edge, not a target.

Qualifying and living are different things. The lender’s payment leaves out utilities, maintenance and repairs. Budget for them separately. A buyer who maxes out the ratio has nothing left for a water heater.

Paying down a car loan or card balance can move the ratio more than a small change in the house payment. Debts with ten months or fewer remaining are generally excluded, so a nearly paid-off loan may not count.

Cash to close matters too. The Loan Estimate has a closing cost section and a cash-to-close line. The CFPB’s Loan Estimate explainer tells borrowers to confirm they have enough cash to close, and notes that items not escrowed must be paid directly, often in large lump sums. A first-year tax bill or insurance premium paid outside escrow is one of those.

Key Terms Defined

PITI: Principal, interest, taxes and insurance, the four basic pieces of a monthly mortgage payment.

LTV (loan-to-value): The loan balance divided by the home’s value, shown as a percentage.

DTI (debt-to-income): Your total monthly debts, including the new housing payment, divided by your gross monthly income.

Escrow: An account the servicer uses to collect and pay your taxes and homeowner’s insurance.

Mortgage insurance: Coverage that protects the lender when the down payment is under 20%. It is required above 80% LTV. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.

Overlay: A lender rule that is stricter than the agency minimum.

What Mistakes Do First-Time Buyers Make?

Five come up again and again:

• Budgeting off principal and interest alone. The CFPB warns the total will typically be more than that figure because of taxes and insurance.
• Assuming 20% down is required. It isn’t. Conventional programs reach 3% down for qualifying first-time buyers.
• Assuming mortgage insurance lasts for the whole loan. On a conventional loan it can be cancelled at 80% and ends at 78%. FHA is a different program with different rules.
• Treating the 80% mark as automatic. The right to request is at 80%. Automatic termination is at 78%.
• Adding debt after approval. A new account can force a re-review or sink the file.

Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.

What to Check on Your Loan Estimate

The Loan Estimate is where an article’s general numbers turn into your numbers. Look at four places:

• Estimated Total Monthly Payment. It sums principal and interest, mortgage insurance and estimated escrow.
• Mortgage insurance line. If you put under 20% down, it should appear. If it doesn’t, ask why.
• Escrow estimate. Confirm which taxes and insurance it covers, and which you pay directly.
• Cash to close. Compare it to what you’ve saved, with room left over. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.

A range is shown only for principal and interest and the total payment, not for mortgage insurance or escrow. That matters if your rate isn’t locked or the loan is adjustable.

Across the wholesale programs Lendmire places files with, the files that run into trouble are rarely about the rate. They are about a missing insurance quote, an association budget that hasn’t been provided, or a gift letter with no source for the funds. Gather those first. Lendmire works with the conventional loan programs available through its wholesale lenders, subject to lender guidelines and full file review.

If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file.

For your own numbers, request a scenario review with Lendmire.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker licensed for consumer lending in 16 states. Lendmire arranges FHA, VA, conventional and jumbo purchase and refinance loans through wholesale lenders; every file is underwritten by the lender under the applicable program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Federal Housing Finance Agency

2. CFPB: What is PITI?

3. Fannie Mae Selling Guide B3-6-03, Monthly Housing Expense

4. Selling Guide

5. Fannie Mae Selling Guide B3-6-02, Debt-to-Income Ratios

6. Fannie Mae Eligibility Matrix

7. CFPB: Removing PMI

8. CFPB’s Loan Estimate explainer