Postcard Business LLC, Sales Tax, and Insurance Basics
The postcard business LLC basics, plus EINs, local licenses, sales tax on advertising, self-employment tax, and insurance, each linked to an official source.
The first time a business owner hands you a $500 check, a pile of questions shows up at once. Do I need a postcard business LLC? Do I charge sales tax? What if somebody sues over an ad? Bob hit exactly this moment. A pizza place said yes to a $500 slot, and his next question to the community was whether he could take the check personally without an LLC yet.
Smart thing to ask. Here's the beginner's map, with every rule linked to its official source.
So, do I need an LLC for a postcard business? Not to get started. The SBA says that if you do business without registering as any other kind of business, you're automatically a sole proprietorship (SBA). It also says that if you do business under your own legal name, you don't need to register anywhere to form the business, though you could miss out on personal liability protection and other benefits (SBA).
Plenty of people sell card #1 as a sole proprietor and form an LLC later. Vlad formed his after his first card was delivered, with two more cards already in the works. That's a common path, not the only right one. Your state and your risk decide it, so it's an attorney and CPA conversation.
The SBA says an LLC protects personal assets like your car, house, and savings in most instances if the business faces bankruptcy or lawsuits. The IRS treats a one-owner LLC as "disregarded" from its owner by default, so the owner generally reports on Schedule C and owes self-employment tax like a sole proprietor. And the SBA says registering a business usually runs under $300 in total, but fees vary by state and structure (SBA).
So by default, a postcard business LLC with one owner doesn't change your federal tax setup. It changes the liability picture. How much that matters for you is exactly what to ask an attorney.
An EIN is a federal tax ID number for your business. The IRS says you never have to pay a fee for one, you can get it online directly from the IRS, and you should beware of websites that charge for it. Generally, you need an EIN to hire employees, run a partnership or corporation, or pay sales and excise taxes, among a few other reasons (IRS).
For opening a business bank account, the SBA lists an EIN "or a Social Security number, if you're a sole proprietorship" (SBA). Some people get an EIN anyway to keep their Social Security number off business paperwork. It's free, so ask your CPA.
There's no single "direct mail business license." It depends on where you live.
Federal. The SBA says federal licenses are for activities regulated by a federal agency, like agriculture, alcohol, aviation, firearms, and broadcasting. Selling ad space on a mailer isn't on its list (SBA).
State, county, and city. The SBA says what you need depends on your business activities and location, fees vary, and local governments set their own licensing and permitting rules (same source). Check your city and county websites for a general business license.
Your card's name. If your card has its own name, like "The York Spotlight," that isn't your legal name or your LLC's name, you might need to register it as a DBA (a trade name or assumed name). The SBA says most states require you to register a DBA if you use one (SBA).
Working from home. The SBA says zoning ordinances can still apply to home-based businesses (SBA).
USPS. EDDM Retail needs no special mailing permit, just a USPS.com account (USPS). On All Inclusive orders through 9x12 Method Printing, our team handles the USPS drop-off.
Sales tax on advertising services is where most people guess. Don't. Whether selling ad space is taxable depends on your state, and sometimes on the details: who designs the ad, who places it, and what gets printed. Here are four real examples from state revenue departments, checked September 2026. Examples, not a 50-state map.
Texas taxes 16 categories of services listed in Tax Code Section 151.0101, and advertising isn't one of them. But the Comptroller also says some things people think of as services are taxable as the sale or processing of tangible personal property, and printing is on that list (Texas Comptroller).
Starting October 1, 2025, Washington applies retail sales tax to advertising services, including the "acquisition of advertising space." It carves out some out-of-home advertising like billboards, but the Department of Revenue notes that carve-out does not include direct mail. It also carves out services tied to printing or publishing, and it mentions ongoing litigation over the law (Washington DOR). Where your card lands is a question for the DOR or a Washington CPA.
South Dakota's sales tax applies to the sale of services, not just goods (South Dakota DOR). Its advertising guide says advertising fees aren't taxable when the same agency prepares the ad and places it in the media, but an ad handed to the client is taxable. It also says brochures and flyers are subject to sales tax (South Dakota DOR guide, July 2023).
Hawaii doesn't have a sales tax. It has the General Excise Tax (Hawaii Department of Taxation), imposed on the gross income of virtually all business activity in Hawaii, including services. It's levied on the business, though many businesses pass it on (Hawaii Department of Taxation).
Four states, four different answers. Yours could differ from all of them.
Search your state's department of revenue website (the official .gov site) for "advertising" and "printing." Look for a guide like the ones South Dakota and Washington publish.
Ask a CPA in your state how it applies to your setup: you sell ad slots, the ads get designed, and you pay a printer to print and mail the card.
If it's taxable, ask how to register with your state and show the tax on invoices.
Ask about tax on what you buy, too, like printing.
Nobody withholds taxes from card money. Here are the federal numbers from the IRS pages on self-employment tax and estimated taxes, checked September 2026.
The IRS says you use Schedule C (Form 1040) to report income or loss from a business you run as a sole proprietor (IRS). A one-owner LLC generally reports there too, unless it elects corporate tax treatment.
The IRS also says you must report side income even if it isn't on a form like a 1099-K or 1099-NEC, and even if you're paid in cash or any other form (IRS). So yes, that CashApp payment counts.
The IRS says a deductible business expense must be both ordinary (common and accepted in your field) and necessary (helpful and appropriate for your business) (IRS Publication 334). Which of your costs qualify is a CPA question. For what a card pays before taxes, see my 9x12 postcard side hustle income breakdown.
Self-employment tax covers Social Security and Medicare. You figure it on Schedule SE, which you generally file if your net earnings from self-employment are $400 or more, and you can deduct the employer-equivalent portion when figuring your adjusted gross income. The IRS page has the fine print, including limits.
The IRS also says individuals, including sole proprietors, generally have to pay estimated tax if they expect to owe $1,000 or more when they file. You use Form 1040-ES, the year has four payment periods, and you may owe a penalty if you don't pay enough during the year.
The IRS says good records help you track deductible expenses, prepare your return, and support what you report, and that your sales and purchases create the supporting documents you need. Except in a few cases, the law doesn't require any special kind of records (IRS). The general rule is to keep them for 3 years, longer in certain situations (IRS).
For a card, that's one folder: invoices, payment receipts, your print invoice, advertiser approvals, and your mailing confirmation.
Your card carries other businesses' logos, photos, offers, and claims to thousands of homes under your card's name. Here's the general landscape of insurance for advertising business owners. A licensed agent fills in the specifics.
The SBA says general liability protects against financial loss from things like bodily injury, property damage, libel, slander, and defending lawsuits (SBA). The NAIC says general liability, also called commercial general liability (CGL), covers personal injury (including slander and libel) and false or misleading advertising, among other events (NAIC).
In a CGL policy, that's Coverage B, personal and advertising injury. The Insurance Information Institute says it protects against libel, slander, false arrest, infringing on another's copyright, malicious prosecution, use of another's advertising idea, and wrongful eviction, entry, or invasion of privacy (Triple-I).
IRMI defines media liability coverage as errors and omissions insurance designed for publishers, broadcasters, and other media-related firms, covering areas like defamation, invasion of privacy, copyright infringement, and plagiarism (IRMI).
Triple-I says professional liability insurance, also called errors and omissions (E&O), covers claims general liability doesn't, like negligence, misrepresentation, and inaccurate advice. Most of these policies are "claims-made," so the policy has to be in effect both when the event happened and when the lawsuit is filed (Triple-I). It isn't provided under homeowners endorsements, in-home business policies, or businessowners policies (Triple-I).
The NAIC says a business owner's policy (BOP) typically bundles property, business interruption, and liability insurance, but typically doesn't include commercial auto, workers' compensation, health or disability insurance, or liability for wrongful professional practices. It also says homeowners' or renters' policies are rarely adequate for a home-based business (NAIC). If you hire help, the SBA says businesses with employees must carry workers' compensation, unemployment, and disability insurance, and some states require more (SBA).
Does my policy's personal and advertising injury coverage apply to a business that sells ad space?
Do I need media liability or E&O coverage for the ads I publish?
Which policy, if any, responds if an advertiser's ad uses a photo they didn't have rights to, or a wrong phone number gets printed?
Does my homeowner's or renter's policy cover anything about this business?
One for your attorney, too: should your advertiser agreement say the advertiser owns the rights to what they send you and approves the final ad? My postcard ad contract template is a starting point for that conversation, not a replacement for it.
Full transparency. Members swap notes on this inside the community all the time. But the community isn't your CPA. Neither am I.
Not to get started. The SBA says you're automatically a sole proprietorship if you do business without registering as another structure, and that an LLC protects your personal assets in most instances. Rules and fees vary by state, so ask an attorney or CPA.
Yes. The IRS says you never have to pay a fee for an EIN, you can get one online directly from the IRS, and you should beware of websites that charge for one.
It depends on your state. Texas doesn't list advertising among its taxable services, Washington has taxed advertising services since October 1, 2025, and in South Dakota it depends on who creates and places the ad. Check your state revenue department and ask a CPA.
Maybe. The IRS says sole proprietors generally have to make estimated tax payments on Form 1040-ES if they expect to owe $1,000 or more when they file. Your CPA can tell you if that's you.
There's no one answer. Common types include general liability (which can include personal and advertising injury coverage), media liability, and E&O. CGL policies can exclude that coverage for insureds whose business is advertising or publishing, so ask a licensed agent.
Not for EDDM Retail. USPS says no special mailing permit is needed, just a USPS.com account. EDDM BMEU mailings use a bulk mailing permit. Your city or county may still require a business license.
It's boring stuff. But getting it right means the money you make stays the money you keep.
As always, I'm rooting for you. Peace.
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