Independent · not SAM.gov or SBA

HUBZone certification: who qualifies, how the 35% rule works, and how to apply

Updated September 2026

HUBZone is the one SBA program that is about where you are and who you employ, not who owns you. It is also the easiest to lose by accident: an employee moves, a lease lapses, or the map changes. The rules below are from 13 CFR part 126 as published on eCFR in September 2026.

What is a HUBZone?

HUBZone stands for historically underutilized business zone. The program exists, in SBA's own words in 13 CFR 126.100, to steer federal contracting to small firms in those areas and so "increase employment opportunities, investment, and economic development" there. Congress backs it with a goal: agencies aim to award 3% of federal prime contract dollars to HUBZone firms, alongside the 23% goal for small businesses overall, as SBA's certifications page lists them.

Section 126.103 defines seven kinds of HUBZone: qualified census tracts (low income or a poverty rate of at least 25%), qualified non-metropolitan counties (low income or high unemployment), lands inside an Indian reservation, Redesignated Areas (tracts and counties that lost status, kept for three years), base closure areas (at least eight years), qualified disaster areas, and governor-designated covered areas.

You do not work this out yourself. SBA publishes the result on its HUBZone map, and 126.304(d) requires applicants to check every address against it: the principal office and the home of each employee you are counting.

Who qualifies for HUBZone certification?

Section 126.200 sets four tests. You must pass all of them on the day you apply, and again on the day SBA decides.

1. Ownership. At least 51% owned and controlled by one or more US citizens, or by an Alaska Native corporation, Indian tribal government, community development corporation, small agricultural cooperative or Native Hawaiian organization. Permanent residents do not count as citizens here.
2. Size. Small, together with your affiliates, under the size standard for any NAICS code listed in your SAM.gov profile. SBA accepts your SAM size representation unless it has reason to doubt it. If you have not checked that number recently, our guide on how to calculate your SBA size walks through receipts, headcount and affiliates.
3. Principal office in a HUBZone. Explained below, because "principal office" does not mean what most owners think it means.
4. 35% residency. At least 35% of your employees must live in a HUBZone. Not necessarily the same HUBZone as the office: any HUBZone counts.

Two more conditions sit in the same section. Neither the firm nor any owner may have an active exclusion in SAM, and neither the firm nor its principals may owe significant unpaid debts to the federal government, such as a tax lien or a defaulted federal loan, unless they are current on an approved repayment plan.

What counts as your principal office?

It is not your registered address and not where the owner sits. Under 126.103, the principal office is "the location where the greatest number of the concern's employees at any one location perform their work." A few consequences follow.

• A tie can fail you. SBA's own example: a four-person services firm with two people working mostly at a HUBZone office and two working mostly at a non-HUBZone office has no single location with the greatest number, so it does not have a principal office in a HUBZone.
• Job-site workers are left out, in services and construction. If your primary industry is services or construction, employees who spend more than 50% of their time at contract job sites are excluded when SBA finds your principal office. A construction firm with 75 people on a job site and 3 in a HUBZone office passes. But if everyone works mostly at job sites, you fail the requirement outright.
• You need paper. A deed, or an active lease that started at least 30 days before SBA's review date and runs at least 60 days past it. SBA may ask for photos or a virtual walk-through. In a coworking space you must show dedicated space with enough desks and equipment for the people you say work there.

There is one protection for firms that commit to an area. If you buy a building, or sign a lease of at least 10 years, for a principal office in a HUBZone, 126.200(c)(1) treats that office as in a HUBZone for up to 10 years even if the map later changes. It does not apply to an office in a Redesignated Area or disaster area at the time of initial certification, to a shared office, to a home, or to an investment made within 180 days of an area's designation expiring.

How does the 35% residency rule work?

This is where most applications live or die, and it turns on two definitions in 126.103: who is an employee, and what it means to reside somewhere.

Who counts as an employee

Anyone employed full-time, part-time or on another basis who generally works at least 10 hours a week in the four weeks before the review date. SBA can accept someone who dipped under 10 hours in a week if they worked at least 40 hours across those four weeks and you have a legitimate business reason.

• Counted: staff from a temp agency, an employee leasing firm or a PEO; owners who work at least 10 hours a week, paid or not; reservists and Guard members called to active duty; people on paid leave.
• Not counted: unpaid non-owners, people on deferred compensation, 1099 independent contractors (unless they are really employees under SBA's tests), and subcontractors.
• Affiliates: an affiliate's employees are not counted automatically, but if there is no "clear line of fracture" between you (shared staff, offices or equipment, the same customers), SBA can add them to your total. Then 35% of the combined headcount must live in a HUBZone.

SBA also wants proof that people actually work. It may ask for job descriptions, timesheets, onboarding records and examples of work product.

What "reside" means

Living at the address full-time for at least 90 calendar days before the review date. SBA looks first at the address on the person's driver's license or state ID. If there is none, or it does not match, you must supply leases, deeds or utility bills and explain the mismatch. A house you own but rent out does not count.

The arithmetic

Take 35% of your headcount and round to the nearest whole number. The regulation's examples: 25 employees gives 8.75, so 9 must live in a HUBZone; 95 employees gives 33.25, so 33. A one-person firm is the exception to rounding: that person must live in a HUBZone.

Legacy employees

People move, and neighborhoods drop off the map. Under 126.200(d)(3), an employee who lived in a HUBZone for at least 180 days after your certification date (or anniversary date) keeps counting as a HUBZone resident, even after moving or after the area loses status, as long as they stay continuously employed. You can have up to four legacy employees at a time, but you need at least one current HUBZone resident for any of them to count. Staff who work under 30 hours a week, or who first qualified by living in a Redesignated Area or disaster area, cannot be legacy employees.

How do you apply, and what does it cost?

You apply online through SBA Certifications, which SBA describes as its free online certification process. There is no government fee. Your SAM.gov registration should be active and accurate first, since SBA reads your NAICS codes and size from it; our free SAM.gov registration checklist covers that part. The main documents SBA will ask for, per 126.304:

• Payroll records covering the four weeks before you apply, for every person you count as an employee.
• A copy of each HUBZone resident employee's driver's license or state ID, or leases, deeds or utility bills where there is none.
• The deed or lease for your principal office, plus anything showing people really work there.

The majority owner is responsible for the accuracy of everything submitted. Under 126.306, SBA does not start processing an incomplete package, and once the package is complete it decides within 60 calendar days. A declined firm can reapply after 90 days.

Once approved, you appear as a certified HUBZone firm in SBA's Dynamic Small Business Search, and you cannot opt out of that public listing and still receive HUBZone contracts. If you have your approval letter but are not showing up within 10 business days, 126.308 says to email SBA at hubzone@sba.gov. For how this certification sits alongside your SAM.gov record, and why SAM.gov itself never grants it, see SBA certifications vs SAM.gov.

A warning that applies to every program on this site: SBA does not sell certifications or charge to keep them. A letter or email that says your HUBZone status will lapse unless you pay is the same fee-letter pattern we describe in our page on SAM.gov registration scams.

What does HUBZone certification win you?

Certification does not guarantee any contract (126.603 says so). It gives you access to five ways of being bought from:

• Set-asides. A contracting officer may restrict a competition to HUBZone firms if they reasonably expect at least two responsible certified HUBZone firms to bid and award can be made at a fair market price (126.607). There is no order of precedence among the 8(a), HUBZone, veteran and women-owned programs: the officer picks, and must document why. The general "Rule of Two" logic is the same one in our explainer on set-asides.
• Sole-source awards. Allowed up to $7 million including options for a manufacturing NAICS code, or $4.5 million for anything else, when two or more HUBZone firms are unlikely to bid, the firm is responsible and the price is fair and reasonable (126.612).
• The 10% price evaluation preference. In full and open competition, if a large business is the lowest offer, the contracting officer adds 10% to its price before comparing it with a HUBZone firm's (126.613). SBA's example: HUBZone firm at $98, large business at $93. With the preference, the large business is treated as $102.30, so the HUBZone firm wins. At $103 it would not. The preference does not apply when the lowest offer is already from a small business.
• Reserves for HUBZone firms inside unrestricted multiple-award contracts.
• Orders set aside for HUBZone firms under multiple-award contracts, including ones competed full and open. Contracts at or below the simplified acquisition threshold can also be set aside or sole-sourced (126.608); our page on the simplified acquisition threshold explains that dollar line.

When you bid on a HUBZone contract, you certify at your initial offer with price that you are certified and eligible, small under that solicitation's NAICS code, will attempt to keep 35% residency during performance, and will meet the limits on subcontracting (126.601). Those limits, from 13 CFR 125.6, cap what you may pay to firms that are not similarly situated (for these contracts, anyone not HUBZone-certified): 50% of the amount paid to you on services and on supplies (materials excluded), 85% on general construction and 75% on specialty trade work.

How do you keep HUBZone status?

There is no time limit on participation (126.502), but four obligations run for as long as you are in.

• Recertify every three years, in the 90 calendar days before your certification anniversary (126.500). Miss it and SBA decertifies you at the end of the period, though it will reinstate you if you recertify within 30 days after.
• Expect examinations. SBA examines each certified firm at least once every three years and may pick firms more often on risk, and it may visit an office unannounced. Keep what you give an examiner for six years (126.403).
• Report ownership changes. After a merger, acquisition or sale, send SBA evidence that you still qualify within 30 days of the deal closing (126.501).
• Attempt to maintain 35% while performing. During a HUBZone contract you do not have to stay at exactly 35%, but you must make "substantive and documented efforts" (written job offers, job ads, job fairs), and you may never fall below 20%. Under 20% counts as failure, and 126.602 says it leads to proposed decertification. A firm that won a HUBZone contract in the past 12 months can recertify, and bid on new HUBZone work, at 20% or more with those documented efforts.

If SBA proposes to decertify you, it emails the address in your profile and gives you 30 days to rebut each reason with documents. Silence lets SBA assume the missing information would have shown you ineligible. Keep the email in your SAM.gov and SBA profiles monitored, for the same reason we give in the page on reps and certs in SAM.gov: the notices go there.

Is the HUBZone map changing in 2026?

Yes, at least in part. SBA's program page says the map was last updated in 2023 and is next due for changes "at some point in 2026, to reflect expiring Redesignated Areas," and in July 2028 to reflect changes to qualified census tracts and non-metropolitan counties. Disaster areas are generally added monthly from FEMA data (126.105).

If your office or your staff's homes are in an area shown as Redesignated, plan for it dropping off: the long-term lease protection does not cover such offices, and employees who first qualified by living there cannot become legacy employees. Recheck every address on the SBA map before each recertification and before each HUBZone bid, because eligibility is judged on the date of your offer.

What happens if a competitor protests your HUBZone status?

On a HUBZone contract, a competitor, the contracting officer or SBA can challenge the apparent winner's status (126.800). On a negotiated buy, a competitor must file with the contracting officer by close of business on the fifth business day after the apparent winner is announced, and must give specific facts: a bare claim that a firm misses the 35% rule is dismissed (126.801). If SBA sustains it, the firm is decertified immediately.

The stakes for getting it wrong on purpose are high. Under 126.900, bidding for a HUBZone contract or registering as HUBZone in a federal database counts as a deliberate certification of status, and a firm that wins by willful misrepresentation faces a presumption that the government lost the whole contract value, plus False Claims Act liability, debarment and criminal penalties. Honest, promptly corrected mistakes are treated differently.

Key facts

• Tests: small; 51% owned and controlled by US citizens (or listed entities); principal office in a HUBZone; 35% of employees live in a HUBZone (13 CFR 126.200).
• Employee and residence: 10+ hours a week in the four weeks before review; living at the address full-time for 90+ days.
• Decision: within 60 days of a complete package; reapply 90 days after a decline.
• Benefits: set-asides, sole source up to $7M (manufacturing) or $4.5M, 10% price evaluation preference against large firms.
• Upkeep: recertify every 3 years; 20% floor and documented efforts during HUBZone contracts.
• Cost to apply at certifications.sba.gov: $0.

This page summarizes 13 CFR part 126 and 125.6 as published on eCFR in September 2026, and SBA's HUBZone program page as of the same date. Check addresses on SBA's HUBZone map and program details at sba.gov, and confirm your registration details at sam.gov.

Independent information, not legal advice. ZeroGov is not SBA, not SAM.gov and not the U.S. government.