Yes, you start paying a mortgage while your house is being built, but not the kind you may be picturing. Once your lender releases the first draw of the construction loan to your builder, you owe monthly interest on whatever has been disbursed so far. Principal doesn’t come into it yet. Those payments start small, grow as more of the loan is drawn, and then convert to a full principal-and-interest mortgage on a 15- or 30-year schedule once the home is finished. Most of the budget stress happens in the middle, especially if you’re also paying rent or an existing mortgage on the home you’re leaving.
How Interest-Only Payments Work During Construction
Construction loans behave differently from a standard mortgage. Each month you pay interest on the portion of the loan the lender has actually released, and nothing more. The principal balance doesn’t shrink no matter how many payments you make, because those payments aren’t touching the amount you borrowed.
Early payments are light. If the builder has drawn $60,000 on a $400,000 loan at 7%, the interest works out to roughly $350 a month. By the time the full $400,000 is out the door for finishes and final work, the same rate produces about $2,333 a month. That climb catches people off guard when they budget only for the first few months of the build.
Rates on construction loans usually run higher than on conventional mortgages. Most lenders price them between 6% and 8%, and many use a variable rate tied to an index like the Secured Overnight Financing Rate plus a lender-specific margin. The variable piece means your payment can shift even in a month when no new draws have been made.
Skipping an interest payment during construction is riskier than it looks. The lender can freeze further disbursements, which halts the builder’s work. A stalled project with no funding tends to snowball: subcontractors file liens, weather damages exposed framing, and the lender may eventually move toward foreclosure on the unfinished structure.
How the Draw Schedule Shapes Your Monthly Cost
Lenders don’t send the full loan amount on day one. They release money in stages called draws, each tied to a construction milestone. A typical schedule breaks into five to seven phases: site preparation and foundation, framing, roofing and exterior, rough mechanical systems, interior finishes, and final completion. The exact split depends on your lender and your builder’s contract.
Before each draw, the lender sends a third-party inspector to confirm the work is actually done. These inspections protect both sides from paying for phantom progress. The fee typically runs $75 to $150 per visit for residential projects, and some lenders absorb it while others pass it to the borrower.
Your interest bill recalculates after every draw. If the first draw covers $50,000 for the foundation, you pay interest on $50,000. When framing pushes total disbursements to $180,000, the payment jumps. The heaviest draws usually land near the end of the project, when cabinetry, flooring, fixtures, and appliances all hit together. That’s when the interest-only payment peaks, right before the loan converts.
Construction delays can temporarily keep your payment lower by pushing draws further out, but that’s a mixed blessing. You’re still paying rent or your current mortgage, and the loan clock keeps running.
What Happens if Construction Runs Past the Loan Term
Construction loans have short fuses. The typical term is about 12 months, though some lenders allow up to 18 months for more complex projects.1USDA Rural Development. Combination Construction to Permanent Loans If your build isn’t finished before the loan matures, you need an extension, and extensions cost money.
Most lenders charge 0.5% to 1% of the loan balance for each extension, plus document fees. On a $400,000 loan, that’s $2,000 to $4,000 just to buy more time. Some lenders also bump the interest rate on the extended term, so the monthly payment climbs from two directions at once. Weather, permit holdups, material shortages, and contractor scheduling conflicts are all common causes of overruns, and none of them excuse you from the extension charge.
Ask the lender before closing what an extension costs and how many are allowed. If the answer surprises you, try to negotiate the extension terms into the loan agreement before signing.
Single-Close Versus Two-Close Loans
What your payment experience looks like also depends on which loan structure you pick. The two main options handle the switch from construction to permanent financing very differently.
Single-Close (Construction-to-Permanent)
A single-close loan covers both phases in one transaction. You close once, pay one set of closing costs, and the loan automatically converts from interest-only construction financing to a standard amortizing mortgage once the home is complete. Down payment requirements for conventional single-close loans typically range from 5% to 20%, depending on your credit profile and the lender.
The main advantage is certainty. The permanent interest rate is often locked at closing, so you know your long-term payment regardless of what rates do during the build. The downside is that fewer lenders offer this product, which narrows your shopping options.
Two-Close (Stand-Alone Construction Loan)
A two-close approach uses a separate short-term construction loan followed by a traditional mortgage refinance once the home is done. You close twice, pay two sets of closing costs, and carry the risk that interest rates rise between the two closings.
Stand-alone construction loans typically carry higher rates than single-close products, and lenders often require 20% to 30% equity in the land before authorizing the first draw. If you don’t own the lot free and clear, you may need a separate land loan on top of everything else.
The biggest risk here is the balloon payment. When the construction note matures, the entire outstanding balance comes due in a single lump sum.2Consumer Financial Protection Bureau. What Is a Balloon Payment? When Is One Allowed? If you can’t close on a permanent mortgage in time, whether because rates have spiked, your credit has changed, or the appraisal came in low, you’re stuck owing the full amount with no easy exit.
Government-Backed Construction Loan Options
If conventional down payment requirements feel steep, government-backed programs offer lower barriers. The payment structure during construction is the same: interest-only on drawn funds. The difference is in how much cash you need upfront and what protections the loan carries.
- FHA one-time close loans require as little as 3.5% down with a credit score of 580 to 600 depending on the lender. You’ll pay an upfront mortgage insurance premium plus annual mortgage insurance, which adds to the permanent monthly payment. The home must be your primary residence, and the builder needs FHA approval.
- VA one-time close loans are available to eligible veterans, active-duty service members, and qualifying surviving spouses. The standout feature is zero down payment with full entitlement. There’s no monthly mortgage insurance, though a VA funding fee applies. Finding lenders that actually offer VA construction loans takes some digging, since not all VA-approved lenders participate.
Both programs use a single-close structure, so you avoid the balloon-payment risk that comes with a two-close arrangement. The trade-off is a smaller pool of participating lenders and stricter builder requirements.
When Full Mortgage Payments Start
The switch from interest-only payments to a full principal-and-interest mortgage happens after your local building department issues a Certificate of Occupancy. That document confirms the home meets code and is safe to live in. The lender then performs a final inspection, confirms all construction draws have been disbursed, and initiates the conversion to permanent financing.
For single-close loans, the conversion is mostly administrative, but it isn’t always rubber-stamped. Fannie Mae requires that your income, employment, and credit documents be no more than four months old at the time of conversion. If construction took longer and those documents are stale, the lender must pull updated credit reports and re-verify income. A job change, new car loan, or credit score drop during the build can trigger a full requalification of the loan.3Fannie Mae. Conversion of Construction-to-Permanent Financing: Single-Closing Transactions Keep your financial profile as stable as you can throughout the build.
Once converted, you begin standard amortizing payments that include both principal and interest on a 15- or 30-year schedule. Property taxes and homeowners insurance are typically rolled into an escrow account at that point, folding everything into one monthly bill.
Other Costs You’ll Carry During the Build
The monthly interest payment isn’t the whole picture. A standard homeowners policy won’t cover a house that doesn’t exist yet, and a partially built structure faces risks a finished home doesn’t.
Builder’s risk insurance fills that gap. It covers damage from fire, storms, vandalism, and theft of uninstalled materials sitting on the job site. It also covers materials in transit and can include soft costs like additional loan interest if a covered event delays the project. Most lenders require a builder’s risk policy before authorizing the first draw. Cost runs roughly 1% to 4% of total construction value, so a $500,000 build might carry $5,000 to $20,000 in premium depending on location, project complexity, and deductible.
Property taxes are another line item people miss. You owe taxes on the land from the day you own it, and in many jurisdictions the assessed value increases as the structure takes shape. Some lenders require you to pay property taxes separately during the build rather than escrowing them, which means you have to budget for tax bills alongside interest payments, rent, insurance, and inspection fees. The full carrying cost of a home under construction is almost always higher than the interest-only payment alone.