Loan-to-Cost (LTC)

Loan-to-cost (LTC) is an underwriting ratio used in Commercial Real Estate finance that measures the relationship between a loan amount and the total cost of a development or renovation project. The formula is straightforward: LTC equals the loan amount divided by the total project cost, expressed as a percentage. Total project cost typically includes land or building acquisition, hard construction costs, soft costs (architectural fees, engineering, permits, legal), financing costs (interest reserves, loan fees), and contingency reserves.

For example, if a developer is building a $10 million industrial facility and secures a $7.5 million construction loan, the LTC ratio is 75%. The remaining 25% represents the equity the borrower must contribute to the project. Most commercial construction lenders cap LTC at 75% to 85% depending on the project type, borrower experience, and market conditions. Ground-up development projects typically see LTC limits of 70% to 80%, while stabilized value-add renovations may qualify for LTC ratios up to 85%.

LTC is distinct from loan-to-value (LTV), though the two metrics are often discussed together. LTV compares the loan amount to the appraised value of the completed project, while LTC compares the loan amount to the actual cost of executing the project. In most development scenarios, the projected completed value exceeds total project cost (this margin is the developer's expected profit), which means LTV is typically lower than LTC for the same loan amount. Lenders evaluate both ratios and generally underwrite to whichever produces the more conservative (lower) loan amount.

SBA 504 loans for eligible real estate projects may allow LTC ratios up to 90% when the CDC/SBA second lien is included alongside the first-mortgage lender's 50% portion. Conventional construction loans from banks and credit unions more commonly hold to 75% to 80% LTC. Bridge lenders and debt funds focused on transitional assets may stretch to 80% to 85% LTC, but at higher interest rates reflecting the additional risk.

Lenders rely on LTC because it directly measures how much of the project's actual expenditure is covered by debt versus equity. A lower LTC ratio means the borrower has more capital at risk, aligning incentives and providing a larger loss cushion if the project encounters cost overruns or market deterioration. LTC is the primary constraint metric for construction loans, pre-development financing, and any transaction where the borrower is actively creating or improving value rather than acquiring a stabilized asset.

LTC directly determines how much equity a borrower must contribute to a project. At an 80% LTC ratio, a $12 million project requires $2.4 million in borrower equity. At 70% LTC, that equity requirement jumps to $3.6 million. For developers and investors structuring capital stacks, even a five-percentage-point difference in allowable LTC can significantly affect returns on equity, the need for mezzanine financing or preferred equity, and whether a deal is feasible at all. Understanding where a project falls on the LTC spectrum is essential before approaching lenders or committing to an acquisition contract.

LTC also interacts with other underwriting metrics in ways that shape deal structure. A lender may approve 80% LTC but still reduce the loan if the resulting debt service coverage ratio (DSCR) on projected stabilized income falls below their threshold, or if the loan-to-value ratio on the completed appraisal exceeds their cap. The binding constraint is whichever metric produces the smallest loan amount. Borrowers who optimize only for LTC without modeling DSCR and LTV scenarios risk structuring a capital stack that collapses when the lender applies its full underwriting matrix.

For borrowers pursuing construction or heavy renovation projects, LTC is the metric that governs draw schedules, equity injection timing, and contingency planning. Lenders fund construction loans in draws that maintain the LTC ratio throughout the build, meaning the borrower's equity is typically contributed first or pari passu with loan draws. Miscalculating total project cost, and therefore the true LTC, can leave a borrower undercapitalized mid-construction with no mechanism to close the gap short of bringing in additional equity or subordinated debt.

• Underestimating total project cost. Borrowers frequently omit soft costs, interest reserves, financing fees, or contingency allocations when calculating LTC. Lenders include all project costs in their LTC calculation, and a borrower who presents an incomplete budget will face a larger equity gap than anticipated once the lender's underwriting is complete.
• Confusing LTC with LTV. Using the completed appraised value instead of total project cost when calculating LTC produces a misleadingly low ratio. LTC and LTV are separate metrics with different denominators. Lenders evaluate both, and the more conservative result governs the loan amount.
• Ignoring cost overrun exposure. If a project exceeds its original budget, the LTC ratio on the original loan amount effectively decreases relative to actual cost, but the lender will not increase the loan to maintain the original LTC. The borrower absorbs 100% of cost overruns above the approved budget, which is why adequate contingency reserves (typically 5% to 10% of hard costs) are critical.
• Assuming LTC is the binding constraint. A lender may quote 80% LTC, but if the completed appraised value results in an LTV above their cap, or if projected DSCR is below threshold, the actual loan will be sized to the tightest constraint. Borrowers should model all three metrics before assuming the LTC-based loan amount is what they will receive.
• Overlooking equity timing requirements. Many construction lenders require the borrower to contribute all equity before the first loan draw, or to inject equity pro rata with each draw. Failing to plan for equity injection timing can cause liquidity problems even when total equity is available.