Your first payment on a construction loan is due about 30 days after the lender releases the initial draw of funds to your builder. That payment covers only the interest on the money disbursed so far, not the full loan amount. Because construction loans release money in stages as building progresses, your monthly obligation starts small and grows with each new draw. Once the home is finished, the payment structure changes, and how it changes depends on the type of construction loan you signed for.
How the First Payment Is Calculated
Construction loans don’t hand you a lump sum on day one. The lender parcels out money through a series of draws tied to construction milestones, and your payment obligation kicks in with the first draw, which usually covers the land purchase or foundation work.
The math is straightforward. If you have a $400,000 construction loan but only $60,000 has been drawn so far, your monthly interest payment is calculated on that $60,000. When framing finishes and the lender releases another $80,000, your next payment reflects the new $140,000 balance. This stair-step pattern continues until the full loan amount has been drawn.
Your rate during construction is almost always variable, typically calculated as the prime rate plus a margin set by your credit profile and the lender’s risk assessment. The lender applies a daily interest rate to the outstanding balance and bills you monthly. Construction loan rates run higher than standard mortgage rates, so these interest-only payments can climb faster than borrowers expect.
Missing these payments can put you in default. Because the collateral is an unfinished house with limited resale value, lenders take construction loan defaults seriously. They can halt further draws and, in extreme cases, initiate foreclosure under the promissory note.
Why Each Draw Changes Your Payment
Before each round of funding is released, an inspector visits the job site to verify that the work matches what the builder claims is complete. These inspections typically happen every 30 to 45 days and check both the percentage of completion and whether materials listed on the draw request are actually on-site. Only after that inspection clears does the lender release the draw, and only then does your outstanding balance grow.
A typical build sees four to six draws, roughly following foundation and site work, framing and rough-in, exterior completion, interior finishing, and a final draw released after the last inspection confirms the home is complete. Framing is usually the biggest single draw, so the payment jump after that milestone is often the largest one you’ll see during the build.
Most lenders charge an inspection fee for each draw, often $50 to $150 per visit. Those fees are the borrower’s responsibility and sit on top of your monthly interest.
Interest Reserve Accounts: Paying Later Instead of Monthly
Some construction loans include an interest reserve, which changes when you personally start writing checks. An interest reserve is a portion of the total loan amount set aside in a separate account at closing. The lender automatically pulls your monthly interest payments from this account during the construction phase, so you don’t send a payment each month out of pocket.
The appeal is obvious if you’re paying rent or a mortgage on your current home while the new one is being built. The tradeoff is that the interest reserve increases your total loan balance, meaning you’re borrowing more and paying interest on a larger amount once the loan converts to permanent financing. Borrowers who can comfortably handle two housing payments during the build often skip the reserve to keep overall debt lower.
When Payments Change to Principal and Interest
The construction phase ends the moment the house is finished, and what happens next depends entirely on the type of loan you took out.
Construction-to-Permanent Loans
With a construction-to-permanent loan (sometimes called a single-close or one-time-close loan), the transition to a standard mortgage happens automatically once the home is finished. The lender requires a certificate of occupancy from your local building department and a final appraisal confirming the home’s completed value. Once those are in hand, the loan converts to permanent financing under the terms you locked in at closing. No second closing, no additional closing costs.
At conversion, your payment structure changes fundamentally. Instead of interest-only payments on a growing balance, you start making fully amortized payments of principal and interest spread over a 15-year or 30-year term.1Fannie Mae. FAQs: Construction-to-Permanent Financing The payment is based on the total amount drawn during construction, calculated at the permanent interest rate you agreed to when you originally closed the loan.2Fannie Mae. Conversion of Construction-to-Permanent Financing: Single-Closing Transactions
Most lenders also establish an escrow account at this point for property taxes and homeowners insurance. Those costs get bundled into your monthly payment, so the number is noticeably higher than principal and interest alone. Pull out the loan estimate and closing disclosure you received before construction began; those documents show what the permanent payment will look like, and comparing them against your actual drawn balance tells you whether you’re on track.
Standalone Construction Loans
Standalone construction loans work differently because they don’t convert into anything. They’re short-term debt with a fixed maturity date, usually 12 to 18 months, and when that date arrives, the full balance comes due as a balloon payment. You make the same interest-only payments during the build, but at the end you need to pay off the entire principal in one shot.
For most borrowers, that means securing a separate permanent mortgage before the construction loan matures. This involves a fresh round of underwriting, a new appraisal of the completed home, and full verification of your financial situation at that point. If home values have dropped during the build or your circumstances have changed, qualifying for that permanent mortgage can become genuinely difficult. A borrower who could easily qualify 14 months ago might struggle if interest rates have climbed or their debt-to-income ratio has shifted.
The advantage is flexibility: you can shop for the best permanent rate available when the house is done, rather than locking in a rate before construction starts. Some borrowers pay off the balance with cash from the sale of a previous home, which eliminates the refinancing gamble. Either way, start the permanent loan application well before maturity. Waiting until the last month is how people end up paying extension fees or, worse, facing default.
What Happens to Payments if Construction Runs Long
Home construction almost never finishes on schedule. Weather delays, permit holdups, material shortages, and subcontractor availability can push your timeline past the original loan term. The lender’s clock keeps ticking regardless of why the project is behind.
If you’re approaching the maturity date on a construction-only loan and the house isn’t done, call the lender to request an extension. Many will grant 30 to 90 days, but it comes with fees, and you may face a rate adjustment if market rates have risen since you closed.3Money. How Do Construction Loans Work Longer delays compound the problem: every extra month is another interest-only payment on a balance that hasn’t moved closer to payoff.
Construction-to-permanent loans handle delays more gracefully since there’s no balloon payment looming, but your interest-only phase simply stretches out. That means higher total interest costs and more months of carrying two housing payments if you’re also paying rent or a mortgage elsewhere. Keep the lender informed about schedule changes as they happen. Lenders respond much better to proactive borrowers than to someone who calls in a panic two weeks before maturity.
Costs the Monthly Payment Doesn’t Cover
Planning for the interest-only payment alone will leave you short. A construction loan comes with several costs that sit outside the monthly bill:
- Closing costs of roughly 2% to 5% of the loan amount at closing, covering origination fees, title insurance, appraisal, and recording fees.
- Draw inspection fees of $50 to $150 per visit, typically four to six times across a build.
- Builder’s risk insurance, which the lender will require during construction to cover the structure and materials against fire, theft, and weather damage. Coverage must equal the completed value of the home, and standard homeowners insurance doesn’t kick in until you have a finished, occupiable home.4Fannie Mae. Builders Risk Insurance Requirements
- Whatever you’re already paying for housing during the build, whether that’s rent or an existing mortgage. For a 12-month build, that’s a full year of overlapping costs.
Borrowers who get into trouble are usually the ones who planned only for the monthly loan payment without accounting for everything around it. Build the full picture into your budget before the first draw hits.