Soft costs in construction are the non-physical expenses required to plan, finance, and legally complete a project: architectural and engineering fees, permits, loan interest, insurance, legal work, and the administrative overhead of getting a building from paper to occupancy. They usually run 15% to 30% of a project’s total budget, and for tax purposes most of them have to be capitalized into the property’s basis rather than deducted the year you pay them.
Hard costs, by contrast, pay for what ends up in the finished building. Concrete, steel, roofing, fixtures, and the tradespeople who install them are hard costs. If it becomes part of the physical structure, it’s hard. If it makes the project possible without showing up in the framing, it’s soft.
The line matters beyond bookkeeping. Lenders underwrite the two categories separately, and the IRS applies different depreciation and capitalization rules to each. Mixing them in a budget makes financing harder to secure and creates problems at tax time.
What Counts as a Soft Cost
Pre-Construction
Before anyone breaks ground, a project accumulates planning and permitting expenses. Architectural design, structural and civil engineering, site surveys, geotechnical reports, and environmental reviews all sit here. So do municipal permit fees, which typically run on a sliding scale tied to estimated construction value and often include separate charges for plan review and third-party inspections. Some jurisdictions add impact fees for roads, schools, or utilities the new development will affect.
Financing
Securing the money creates its own layer. Construction loan origination fees generally run between 0.5% and 1.5% of the loan amount, with higher-risk projects pushing above that. Appraisal fees, title insurance, escrow charges, and commitment fees fill out the upfront financing side.
The single largest financing soft cost is usually interest during construction. Because the loan sits outstanding for months or years before the property produces revenue, accumulated interest becomes a major budget line and, as explained below, one the IRS treats in a specific way.
Administrative, Legal, and Insurance
Project management salaries, developer overhead, and accounting services all count. Legal fees for contract drafting, zoning work, and dispute resolution accrue throughout the project. Insurance is easy to overlook: general liability and builder’s risk premiums are soft costs, and lenders typically require both before releasing any draw. As the building approaches completion, marketing spend and leasing commissions paid to brokers also qualify.
How Much Soft Costs Add to a Project Budget
Commercial developments generally land between 20% and 30% of total budget in soft costs. Residential projects tend to run 15% to 25%. The exact share moves with local permitting complexity, current interest rates, and how much legal work the deal demands. Budgeting soft costs at an arbitrary flat percentage is where a lot of first-time developers get into trouble.
Soft costs are also the category most likely to blow up during delays. If a permit review drags on, carrying costs like loan interest, property taxes, insurance, and site security keep accumulating with no matching progress on the building. Material prices can climb in the meantime, compounding the damage once construction restarts.
Experienced developers build a contingency reserve into their soft cost budget, typically 5% to 10% of total project costs. That buffer absorbs permit slippage, legal surprises, and interest rate movement without forcing the developer to seek additional financing mid-project, which usually comes at a steep premium.
How the IRS Treats Soft Costs
The IRS draws a hard line between soft costs you must capitalize and those you can expense the year you pay them. Getting it wrong can trigger audit adjustments and back taxes with interest.
The Uniform Capitalization Rules
Section 263A of the Internal Revenue Code requires developers to capitalize both direct and indirect costs of producing real property, meaning those costs get added to the property’s basis and recovered slowly through depreciation.1Office of the Law Revision Counsel. 26 US Code 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses Architectural fees, engineering costs, building permits, inspection fees, and legal costs tied to construction all fall into this category.2Internal Revenue Service. Publication 551 – Basis of Assets
Interest during construction has its own rule under Section 263A(f). You must capitalize interest paid during the production period if the property has a long useful life, which includes all real property, or if production takes more than a year and costs exceed $1,000,000. The rule captures not only interest on loans taken specifically for the project, but also interest on other debt to the extent you could have reduced borrowing costs by not incurring production expenditures.1Office of the Law Revision Counsel. 26 US Code 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
The Small Business Taxpayer Exception
Not every developer is subject to these rules. A small business taxpayer that meets the gross receipts test under Section 448(c) is exempt from Section 263A for that tax year.3eCFR. 26 CFR 1.263A-3 – Rules Relating to Property Acquired for Resale For 2026, the threshold is generally $30 million or less in average annual gross receipts over the prior three tax years. Smaller developers who qualify can potentially deduct certain soft costs immediately instead of capitalizing them, which is a meaningful cash-flow advantage.
What You Can Still Deduct Currently
Soft costs that aren’t directly tied to producing the property may be deducted the year they’re incurred. General corporate overhead, office rent for the developer’s headquarters, and marketing spend for a project already placed in service can often qualify. The test is whether the cost is allocable to the production activity. If it would exist regardless of whether this particular project were being built, it’s more likely deductible currently.
Depreciating the Capitalized Soft Costs
Capitalized soft costs become part of the property’s depreciable basis and are recovered over the asset’s assigned life. Nonresidential real property uses a 39-year recovery period under the Modified Accelerated Cost Recovery System.4Office of the Law Revision Counsel. 26 US Code 168 – Accelerated Cost Recovery System Residential rental property uses 27.5 years. Annual depreciation is reported on Form 4562.5Internal Revenue Service. About Form 4562, Depreciation and Amortization
Spreading costs over 39 years means each year’s deduction is small. A $500,000 architectural fee capitalized into a commercial building’s basis produces roughly $12,820 of annual depreciation. That math is why cost segregation has become standard practice for larger projects.
Cost Segregation and Bonus Depreciation
A cost segregation study reclassifies portions of a building’s capitalized costs, including soft costs, out of the default 39-year or 27.5-year bucket and into shorter-lived asset categories of 5, 7, or 15 years. The share of an architect’s fee allocable to site improvements like landscaping, parking lots, or specialized electrical systems, for example, can be reassigned to a 15-year or even 5-year class. The IRS Cost Segregation Audit Technique Guide requires any quality study to document how indirect costs were allocated across those classes.6Internal Revenue Service. Publication 5653 – Cost Segregation Audit Technique Guide
The payoff got much larger after the One Big Beautiful Bill Act permanently restored 100% first-year bonus depreciation for qualifying property acquired and placed in service after January 19, 2025.7Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill Any soft cost that a study reclassifies into a 5-, 7-, or 15-year asset class can now be deducted entirely in the first year rather than stretched over decades. On a large commercial project, that shifts hundreds of thousands of dollars of deductions from future years into the current one.
Soft Costs and the Lending Process
Commercial lenders require a detailed soft cost budget as part of any construction loan application. Underwriters compare each projected line item against comparable projects and flag anything that looks unrealistically low. An incomplete or understated soft cost budget is one of the fastest ways to get a loan rejected or come back with worse terms.
Title insurance and legal fees incurred at settlement are treated as part of the property’s acquisition cost and get capitalized into basis regardless of how they’re funded.2Internal Revenue Service. Publication 551 – Basis of Assets Lenders also monitor soft cost draws during construction. If actual spending starts trending above the approved budget, the lender may require the developer to inject additional equity or cut scope elsewhere. Keeping real-time tracking against the approved budget is unglamorous work, but it preserves the lender relationship and prevents mid-project funding crises.