You start paying on a construction loan shortly after the lender releases the first draw to your builder, not at closing. That first bill, and every monthly bill through the construction phase, covers interest only on the money that has actually been disbursed so far. Full principal-and-interest payments don’t begin until the house is finished and the loan converts to a permanent mortgage or you refinance into one.1First Merchants Bank. Do I Make Payments on a Construction Loan?
Your First Payment Comes After the First Draw
Construction lenders don’t hand over the full loan at closing. They release money in stages called draws, each tied to a specific milestone: site preparation, foundation, framing, interior finishing, and so on. Your payment obligation begins once the first draw goes out, and you pay simple interest only on the amount disbursed, not the full loan you were approved for.1First Merchants Bank. Do I Make Payments on a Construction Loan?
Before each draw, the lender sends an inspector to confirm the builder actually completed the work being billed for. Those inspections typically cost a few hundred dollars per visit, and the fee is often rolled into the loan balance rather than billed separately. Each approved inspection triggers the next release of funds, which means your outstanding balance grows and your monthly interest bill grows with it.
How the Monthly Interest Payment Grows
Most construction loans carry a variable interest rate pegged to the prime rate plus a margin. As of early 2026, the U.S. prime rate sits at 6.75%, so a construction loan with a 1.5% margin would run around 8.25%. The monthly math is simple: multiply the outstanding balance by the annual rate, then divide by 12.
Say you have a $500,000 construction loan at 8%. Early on, when only $100,000 has been drawn, your monthly interest payment is roughly $667. By the time the project nears completion and $400,000 is out the door, that payment jumps to about $2,667. The escalation catches some borrowers off guard, so it helps to map out the draw schedule in advance and budget for the peak months.
Interest accrues daily on most construction loans. The daily figure is your outstanding balance times the annual rate divided by 365. If a draw lands mid-month, you’ll see a partial increase on that month’s bill rather than waiting for the next cycle.
If Your Loan Has an Interest Reserve
Some construction loans include a feature called an interest reserve. The lender sets aside part of the total loan proceeds in a dedicated account and uses that money to cover your monthly interest during the construction phase. From your side, it feels like you’re not making payments at all, but the interest is still accruing and still being paid, just from your own loan funds.
The reserve is usually calculated from the projected draw schedule and an estimate of total interest over the construction period, sometimes with a contingency buffer of around 5% to account for delays. If construction runs longer than expected and the reserve runs dry, you become personally responsible for the remaining interest out of pocket. Lenders rarely top the reserve up, so the shortfall lands on you.
Even with a reserve, you’re ultimately paying that interest, because it increases the balance that rolls into permanent financing. Think of it as deferred payment, not free money.
Other Bills That Don’t Wait for the House to Be Finished
Property Taxes
Your land is taxable from the moment you own it, and the assessed value typically rises as the structure takes shape. Most lenders don’t set up an escrow account during construction, which means you’re responsible for paying property tax bills directly as they come due.2RD.usda.gov. HB-1-3550 Chapter 7 – Escrow, Taxes and Insurance Some lenders will let you fold estimated tax amounts into the loan, but you have to request that during underwriting. Taxes are not on pause while the house goes up.
Builder’s Risk Insurance
Standard homeowner’s insurance doesn’t cover a property under construction. Lenders require a builder’s risk policy that protects against fire, theft, vandalism, and weather damage during the build. The borrower or builder, depending on the contract, must keep this coverage active for the entire construction period. Once the house is finished and you move in, you’ll switch to a standard homeowner’s policy, and escrow for insurance begins with your permanent mortgage payments.2RD.usda.gov. HB-1-3550 Chapter 7 – Escrow, Taxes and Insurance
When Full Principal-and-Interest Payments Kick In
The shift from interest-only to full monthly payments happens once the project is legally finished. The trigger is typically the issuance of a certificate of occupancy by your local building department, which confirms the structure meets applicable codes and is safe to live in.3Fannie Mae. B5-3.1-01, Conversion of Construction-to-Permanent Financing: Overview At that point, the lender stops billing interest-only and starts amortizing the loan, so each payment covers both interest and a portion of principal.
Amortized payments are calculated over a standard mortgage term, usually 15 or 30 years, and are significantly higher than the interest-only payments during construction.4CONSUMER FINANCIAL PROTECTION BUREAU. TRID Rule: Separate Construction Loan Disclosures Guide On a $400,000 balance at 7% over 30 years, your monthly principal-and-interest payment runs around $2,661. If you were paying $2,333 in interest alone at the peak of the build, the jump may seem modest, but the obligation is now fixed and long-term. Missing these payments puts your home at risk of foreclosure like any other mortgage.
With a construction-to-permanent (single-close) loan, this conversion happens automatically on the schedule set at the original closing. When construction finishes ahead of or behind that schedule, the lender uses a loan modification agreement to update the amortization start and end dates.5Fannie Mae. B5-3.1-02, Conversion of Construction-to-Permanent Financing: Single-Closing Transactions Only a handful of terms can change at conversion: the interest rate, loan amount, loan term, and amortization type. Your lender may also requalify you at this point, pulling updated credit and verifying your financial picture hasn’t deteriorated. Keeping your credit stable during the build isn’t optional.
What Happens If Construction Runs Long
Delays are the norm in residential construction, not the exception. When a project runs long, costs grow in several directions at once. The interest-only period extends, which means more months of payments on a rising balance. If your interest rate was locked for the permanent phase, that lock may expire, and extending it typically costs between 0.25% and 1% of the loan amount, though some lenders charge a flat fee instead. On a $400,000 loan, that’s $1,000 to $4,000.
If the delay pushes past your loan’s maturity date, you’ll need to negotiate an extension with your lender, which can involve modification fees, requalification, or additional closing costs. Lenders sometimes grant short extensions, but they aren’t obligated to. If the project stalls badly enough that the lender loses confidence in completion, they can decline to extend and demand repayment. At that point, you’re trying to refinance an unfinished property, which very few lenders will touch. Padding your budget with two to three extra months of interest-only payments can keep a slow build from turning into a real crisis.
Single-Close vs. Standalone: How the Payoff Differs
A single-close loan wraps the construction phase and the permanent mortgage into one transaction. You close once, pay one set of closing costs, and the loan converts automatically when the house is done. The terms of your permanent mortgage, including rate and repayment length, are set at that first closing.
A standalone construction loan (sometimes called construction-only) is separate from whatever permanent mortgage you eventually get. It typically runs about a year with interest-only payments, same as the single-close version. The critical difference comes at the end: the entire remaining balance is due in full when the loan matures. You either pay it off in cash or close on a separate permanent mortgage first. That second closing generates its own round of fees, generally 2% to 5% of the loan amount, so on a $400,000 loan you could pay $8,000 to $20,000 in costs that single-close borrowers avoid.
The upside of a standalone loan is flexibility, since you can shop lenders for the permanent mortgage after the house is built. The risk is real: if your credit drops, rates spike, or the house appraises lower than expected, qualifying for that permanent loan gets harder, and failing to close before the construction loan matures means steep extension fees or default.