SBA Car Wash Feasibility Study for 7(a) and 504 Loans

No regulation makes a feasibility study automatic for a car wash. The operative text is 13 CFR 120.160(b): SBA "may require" professional appraisals, a survey, or a feasibility study as a loan condition. What converts "may" into "does" is lender practice, and it is consistent: start-up operators, ground-up tunnel construction, projection-based credits with no operating history, and acquisitions where the price rests on a turnaround story. On those files the credit memo needs independent evidence that the project repays the loan, and a feasibility study with a stated determination and a stressed coverage ratio is the document built to supply it. The program-wide requirements are covered on the SBA feasibility study hub and in the SBA underwriting regulatory spine; this page covers what is specific to car washes.

SBA's guidance lists car washes among its examples of limited or special purpose properties, alongside hotels, gas stations with or without a convenience store, golf courses, medical facilities and bowling alleys, among others. The list is long and non-exhaustive; descriptions of car washes as one of only three special purpose categories overstate the rule. The classification has two concrete consequences.

First, the down payment. Under 13 CFR 120.910, the minimum 504 borrower contribution rises from 10 percent to at least 15 percent when the project involves a limited or single purpose building, and to at least 20 percent when the business has also operated for two years or less. A first-time operator building a new express tunnel is in the 20 percent cell, and the feasibility study's capital stack is built around it.

Second, the appraisal. SBA requires the going concern appraisal on special purpose property to be completed by a certified general appraiser experienced with the property type, with value allocated across land, building, equipment and intangible business value. The feasibility study and the appraisal must reconcile: the study's stabilized cash flow is the income the appraisal capitalizes, and lenders notice when the two documents describe different businesses.

The standard 504 structure for a special purpose car wash is 50 percent bank first lien, 35 percent CDC debenture and 15 percent borrower equity, moving to 50/30/20 for a new business. Three program rules deserve attention in car wash files.

The job standard. Since SBA's September 30, 2025 notice, a 504 project must create or retain one job opportunity per $95,000 of SBA-guaranteed debt, up from $90,000. Express tunnels with license plate recognition run lean, typically five to eight full-time equivalents, so a debenture of $1.5 million, which would require 16 jobs, rarely qualifies on job count alone. Those projects qualify through a community development or public policy goal under 13 CFR 120.862, which SBA permits where the CDC's portfolio continues to meet the job average. MMCG's studies document both the FTE count and the goal rather than leaving the question to the application.

The energy route. Energy Public Policy projects carry a higher lending limit of $5.5 million per project and $16.5 million in aggregate, but the qualification is narrower than car wash marketing suggests. The energy consumption test, a reduction of at least 10 percent, applies to a facility replacing an existing one or to a retrofit, so a greenfield wash qualifies only through renewable energy generation. Water reclaim is not an energy measure, and variable frequency drives count only inside a qualifying retrofit. MMCG states in the study whether the project plausibly meets an energy policy goal instead of leaving the claim to the application.

Large projects. For 504 projects of $5 million or more, SOP 50 10 8.1 sets a minimum debt service coverage of 1.15x and additional third-party lender underwriting requirements. A franchised express tunnel with land in a growing market crosses that line routinely, and the study reports coverage against it.

The 7(a) program finances car wash construction, acquisition, equipment and partner buyouts up to the $5,000,000 statutory maximum, with real estate amortizing up to 25 years. Three current rules shape car wash files. Start-ups and complete changes of ownership require a minimum 10 percent equity injection. Since March 1, 2026, 7(a) Small Loans of $350,000 or less must show debt service coverage of at least 1.10:1 on a historical or projected basis, which reaches equipment-only and working capital requests at existing washes. And franchised projects must reconcile with the SBA Franchise Directory, which SBA reinstated for loans approved on or after June 1, 2025: listed brands no longer need a franchise agreement addendum, SBA requires an executed Franchisor Certification from January 1, 2026, and the largest express franchise system is listed, while the largest operator in the industry does not franchise at all. Directory status is confirmed in SBA's current file at application, not assumed.

SOP 50 10 8.1, which applies to applications received by SBA on or after October 1, 2026, provides that 7(a) guaranty exposure no longer reduces the 504 financing a borrower can access. For a franchised or ground-up wash that makes a two-loan structure practical: the 504 loan finances the land, building and equipment at a fixed debenture rate over 25 years with the special purpose contribution, and a small 7(a) loan finances the costs 504 does not carry well, the initial franchise fee, training and opening support, pre-opening marketing and working capital, with the 10 percent start-up injection applied to its own portion. MMCG's Erie, Pennsylvania model study works the structure through a Directory-listed franchise prototype, including the 1.15x test for a 504 project above $5 million.

SOP 50 10 8.1 changes acquisition underwriting in ways that bear directly on car washes.

Initial acquisitions must show 1.25x debt service coverage on historical cash flow, using the last fiscal year or the average of the last two, and the lender may not rely on post-closing projections. The equity injection is at least 10 percent and cannot be reduced, seller debt on full standby counts toward no more than half of the required injection, and the business portion of the loan amortizes over no more than 10 years while real estate can run to 25. That last rule is the one buyers miss. An older wash with $398,000 of EBITDA supports at most about $2.67 million of 7(a) debt at 1.25x when $2 million of real estate is financed over 25 years, so a $4.5 million to $5.0 million asking price covers its debt only 0.62 to 0.70 times. The cure is structural: a lower price, a larger cash injection, a seller note on full standby, and repositioning capital funded with equity, because SOP 50 10 8.1 sizes acquisition debt on what the wash has earned rather than on what it will earn. MMCG's Hurst, Texas model study works that restructure through to 1.25x on history.

A lender-commissioned quality of earnings review by an independent financial professional is required when the business purchase price is $3 million or more, measured before buyer equity or seller financing, on initial acquisitions and business expansions alike. In a car wash acquisition, the going-concern appraisal's allocation between real estate, equipment and intangible value decides which side of that line the deal falls on.

Repositioning budgets also have to respect zoning. Many older washes are nonconforming uses under current codes, and nonconforming status typically bars structural alteration and enlargement without board relief and ends after a period of discontinued use or removal of the equipment. MMCG's acquisition studies confirm the zoning status first, sequence equipment work so that the wash never sits idle near the abandonment trigger, and state plainly when no determination is possible until the seller produces tax returns and member counts.

Car washes sit inside NAICS 8111, which SBA's environmental appendix treats as environmentally sensitive, but the appendix carves out "car wash only" facilities, for which a Transaction Screen is an acceptable starting point rather than a mandatory Phase I. The carve-out is narrow. A wash with fuel sales present or historical falls under the gas station protocol, and prior site uses, dry cleaners and service stations above all, routinely escalate the screen to a Phase I regardless. The feasibility study flags the expected environmental path early, because an unbudgeted Phase I and remediation contingency is a schedule and cost item, not a surprise the closing should absorb.

Car washes have been a well-performing SBA asset class, and the loan-level record is the evidence. On resolved 7(a) loans since FY2010, car washes charged off at 5.25 percent against 7.45 percent for all industries, per MMCG's analysis of SBA loan-level data. Industry analyses of the same public data that combine 7(a) and 504 put the modern-era charge-off near 4.4 percent, against 13.7 percent for pre-2010 cohorts, which is the measurable result of the industry's shift to membership revenue and institutional operations. The two figures measure different scopes and are labeled accordingly.

Volume tells the cycle's story. 7(a) originations peaked with the development wave and have normalized since, while 504 project counts have held steadier, and the 504 median of roughly $1.3 million is the better proxy for new-build activity, since post-2022 7(a) medians are pulled down by small working capital loans rather than cheaper washes.

Source: SBA 7(a) and 504 loan-level data (FOIA), NAICS 811192, through March 31, 2026; MMCG

FY2025 produced 243 7(a) car wash loans for $272 million, an average of $1.12 million per loan. The record also varies by market: in Dallas-Fort Worth, one of the most active car wash lending markets in the country, charge-offs on the historical loan book run near 1 percent. MMCG's studies place each project against this record, by program, by cohort and by market.

Lenders sometimes ask applicants for a "business plan with projections," and applicants sometimes assume that satisfies the file. It rarely does on a projection-based car wash credit. A business plan is the applicant's own statement of intent; a feasibility study is an independent third party's test of it, with a competitor census, verified traffic and demographic data, a ramp benchmarked to industry evidence, a complete cost build-up and a determination the credit memo can cite. MMCG's studies are structured so the lender can lift the coverage table, the sensitivity cases and the determination directly into underwriting. The firm's analysis of what SBA actually requires, and what it does not, is set out in the SBA feasibility study requirement that does not exist.

MMCG's SBA model studies apply these rules to real markets, each with the cost build-up, coverage by year and the stated determination:

MMCG prepares SBA car wash feasibility studies nationwide for 7(a) and 504 lenders, CDCs and applicants. Engagements start at $4,900 with fixed-fee scoping, delivery runs 9 to 16 business days with rush from 5, payment is 50 percent at engagement and 50 percent on delivery, and every study carries MMCG's written acceptance guarantee: revisions required by the lender or agency are made at no additional cost. For the asset class fundamentals, formats, break-even math, membership underwriting and construction costs, see the full car wash feasibility study page.