Guides
Commercial vs personal insurance: where personal policies stop
Homeowners, auto and umbrella policies exclude or cap most business activity. See the ISO homeowners wording, where the gaps are and what commercial cover adds.
Personal policies insure a household, not a business. A homeowners policy caps the business property it will pay for at a few thousand dollars and excludes liability for injuries that arise out of a business, a personal auto policy excludes most work use, and a personal umbrella usually follows the same exclusions. A commercial policy exists because those gaps are exactly where business losses happen: customers, employees, inventory, equipment, professional work and lost income. The line is not about whether you have a license or a logo; it is about the form's wording and how you use the property.
Built for different people
Personal insurance is underwritten on a household: who lives there, how old the house is, the family's driving records. Commercial insurance is underwritten on an operation: what you do, how many people you employ, what you sell, where you work and what your contracts promise. The forms differ accordingly. The ISO Homeowners 3 Special Form (HO 00 03) insures a dwelling, other structures, personal property and personal liability for "you," meaning the named insured and a resident spouse. Commercial forms such as the commercial general liability form (CG 00 01) and the businessowners form (BP 00 03) insure a "named insured" that can be an individual, partnership, LLC or corporation, with employees, volunteers and managers added as insureds.
Pricing differs too. A homeowners policy is rated on replacement cost of the house and local factors. A commercial policy is rated on payroll, sales, square footage and class of business, as covered in how commercial insurance premiums are calculated.
What the homeowners form says about business
The 2011 edition of the ISO form (HO 00 03 05 11, a copy of which is posted by the Maine Bureau of Insurance) shows the pattern. Individual carriers use their own editions and forms, so read yours, but the structure is standard.
Definition of "business." The form defines it as a trade, profession or occupation engaged in on a full-time, part-time or occasional basis, or any other activity engaged in for money or other compensation. It then carves out minor activities, such as one or more activities for which no insured receives more than $2,000 in total compensation in the 12 months before the policy period, volunteer work, and certain home day care exceptions. An occasional craft sale that stays under that threshold falls within the carve-out; a side business that earns real money does not. IRMI reports that the 2022 edition (HO 00 03 03 22) raised the threshold to $5,000.
Property limits. Under Coverage C, special limits apply to business property: $2,500 on property on the residence premises used primarily for business, and $1,500 on such property away from the premises. IRMI's analysis of the 2022 edition puts the on-premises limit at $3,000 and the away limit at $1,500, and reports that the endorsement HO 04 12 (Increased Limits On Business Property) can raise the on-premises figure, up to $10,000 (IRMI). That endorsement raises the property limit only. It does not touch the liability exclusion.
Other structures. Coverage B does not cover other structures from which any business is conducted. It also excludes structures used to store business property, but takes that back for a structure that contains business property solely owned by an insured or a tenant of the dwelling, so long as the property is not gaseous or liquid fuel. A detached garage holding the owner's own inventory stays covered as a building, while the inventory itself falls under the business property sublimit.
Business liability exclusion. Under Section II, Coverage E (personal liability) does not apply to bodily injury or property damage "arising out of or in connection with a 'business' conducted from an 'insured location' or engaged in by an 'insured'." Coverage F (medical payments to others) excludes bodily injury arising out of a business engaged in by an insured. A separate professional services exclusion removes injury arising out of rendering or failing to render professional services. Narrow exceptions exist, including an insured under 21 in a part-time or occasional self-employed business with no employees, and certain rentals of the insured location.
Put plainly: the physical house is covered, but the business inside it is mostly not.
Where personal policies stop, by type
| Personal policy | What it generally does | Where business is excluded or capped |
|---|---|---|
| Homeowners or renters | Dwelling, belongings, personal liability | Low sublimits on business property; business liability and professional services excluded |
| Personal auto | Household vehicles and drivers | Public or livery use, delivery for pay and most business use; see commercial vs personal auto: when you need a business auto policy |
| Personal umbrella | Excess limits over personal liability and auto | Typically follows the same business exclusions; check the form |
| Personal health, disability and life | The individual | Not a substitute for workers' comp, group benefits, key person coverage or business overhead expense |
| Personal cyber or identity restoration add-ons | The individual's identity and devices | Business data, customer records and network liability |
None of this means a personal policy is useless for a business owner. It remains the right policy for the home, the family cars and personal liability. The point is that a loss with a business cause, a business victim or a business use is likely to be someone else's policy's job.
What a commercial policy adds
- A business as the insured. The named insured can be an entity, and the policy covers its employees, managers and members as insureds.
- Premises and operations liability. Customers, vendors and visitors are the premise of a general liability policy. It also covers products, completed operations and advertising injury.
- Business personal property and income. Equipment, inventory and tenant improvements on a replacement cost basis, plus the lost net income and extra expense from a covered shutdown.
- Contract compliance. Additional insured status, primary and noncontributory wording and certificates, which leases and customers require. See certificates of insurance: what they prove and what they do not.
- Employee coverage. Workers' compensation, which no personal policy offers.
- Limits that match contracts. A $1 million per-occurrence limit with a $2 million aggregate is common in leases and customer contracts, far above the sublimits in a homeowners policy.
A hypothetical example
Say a homeowner launches an online shop selling handmade goods from a spare room and a detached garage. By the second year she has about $18,000 of inventory and packing equipment, a part-time helper and a few customers who pick up orders at the door. A fire in the garage destroys the inventory. Her homeowners policy was written without any mention of the business. Under the ISO form's wording, the garage itself may stay covered as a building, but the business property sublimit applies to the contents, and the part-time helper is an exposure the policy does not mention at all. Whatever the final outcome under her carrier's actual form, she is arguing for a fraction of the loss. A BOP or home-based business policy would have scheduled the inventory and covered the interruption. This is a made-up example, not a claim result.
The liability side works the same way. If a pickup customer slips on her porch steps, Coverage E's business exclusion is the first place the carrier will look.
Gray zones
- Side hustles and occasional income. Below the minor-activity threshold in the form, a homeowners policy may still respond. Above it, the business is a business, even if it is part-time. See insurance for a side business or part-time venture.
- Sole proprietors. No entity does not mean no business. A sole proprietor's liability is personal, which makes the business exclusion a bigger problem; see insurance for sole proprietors and the self-employed.
- Rentals. Homeowners policies are not built for rental property. Landlords and hosts need a landlord or rental policy; see Landlord insurance and Short-term rental insurance.
- Employees' own cars. An employee driving a personal vehicle on an errand exposes the employer, as explained in employees driving their own cars for work: who is liable?.
- Working from home for an employer. The work is the employer's operation, so the employer's policies, workers' comp for one, are the ones that respond to it. ISO also has a business pursuits endorsement (
HO 24 71) aimed at people employed by others, per IRMI.
What to do
- List what your business owns, what it does and who comes to your location. Use the What business insurance do I need?.
- Read your homeowners declarations and the business-related endorsements, and tell your carrier in writing about any business use.
- For a home business with modest size, ask about the ISO-style Home Business Insurance Coverage endorsement (
HO 07 01), which IRMI reports offers business property, income, liability and medical payments for eligible small home businesses, or a BOP. Carriers use their own versions, so compare actual forms. home-based business insurance: why a homeowners policy falls short covers the options. - For anything with employees, vehicles, customers on site or professional advice, buy commercial policies, using What is a business owner's policy (BOP)? as the starting point.
- Run each contract through the contract insurance requirements checker to see what limits and endorsements it needs.
Key takeaways
- Personal policies are written for households; the ISO homeowners form caps business property at a few thousand dollars and excludes liability from a business conducted at the home.
- Raising the business property limit with an endorsement does not fix the liability exclusion.
- Personal auto, umbrella and cyber add-ons carry the same kind of business limits, so each needs its own commercial counterpart.
- A commercial policy adds the entity as insured, premises and products liability, business income, employee coverage and contract-ready limits.
- Tell your homeowners carrier about business use in writing, then move the business exposures onto a commercial policy before a loss, not after.