Forming an LLC is easy. Keeping it in good standing and actually getting the protection you paid for — that is where founders slip up. These are the eleven mistakes we see most often, roughly ordered by how much damage they cause.
1. Paying for an EIN
The IRS issues Employer Identification Numbers free in about 15 minutes. Formation services charging $50–$75 for this are selling you a free government form. This is the single most common upsell in the industry — decline it every time. (How to get your EIN free)
2. Mixing personal and business money
The fastest way to destroy your liability protection. Courts can "pierce the corporate veil" — holding you personally liable — when owners treat the LLC like a personal piggy bank. Open a separate business bank account the week your LLC is approved, and run all business income and expenses through it. No exceptions, no "I'll sort it out later."
3. Missing annual reports
Most states require an annual (or biennial) report — usually a simple online form and $0–$300. Miss it and penalties accrue; ignore it long enough and the state administratively dissolves your LLC, wiping out your liability protection until you reinstate (with penalties). Put every deadline in your calendar the day you form.
4. Letting your registered agent lapse
If your agent resigns, you move, or you stop paying the service, the state loses its way to reach you — and dissolution proceedings follow. Keep your agent current, and update the state immediately if anything changes. (Why agents matter)
5. Skipping the operating agreement
Even solo founders. Banks ask for it, courts respect it, and it takes under an hour with a template. An unsigned agreement in your downloads folder counts for nothing — sign and date it. (What to include)
6. Filing in the wrong state for the wrong reasons
Wyoming and Delaware are excellent — for specific situations. If you operate locally, forming out of state means double compliance: foreign qualification, two annual reports, two registered agents. The "cheap" out-of-state LLC usually costs more. Default to your home state unless you can quantify the benefit.
7. Forgetting business licenses
The LLC filing is state-level. Your city and county usually have their own license requirements — and operating without one can mean fines that dwarf your filing fee. Check your city clerk's website; it takes ten minutes.
8. Not paying quarterly taxes
No employer withholds taxes for you. If you will owe $1,000+, the IRS expects quarterly estimated payments (April, June, September, January). Miss them and underpayment penalties apply. Set aside 25–30% of profit from day one. (Tax guide)
9. Choosing a name you cannot use
Falling in love with a name before checking: (a) your state's business registry, (b) the domain, (c) the USPTO trademark database. Rebranding after launch — new domain, new filings, confused customers — costs far more than ten minutes of searching upfront.
10. Ignoring the publication requirement
A few states (notably New York) require new LLCs to publish formation notices in newspapers — costing $300 to $1,200+ in some counties. Founders who miss this face compliance holds. If you are forming in New York, budget for it from the start.
11. Treating formation as a one-time event
An LLC is a living entity: annual reports, license renewals, tax filings, updated operating agreements when membership changes. Spend 30 minutes each January reviewing a simple compliance checklist, and you will never face a nasty surprise.
The 30-minute annual checklist
- Annual report filed (check your state's deadline)
- Registered agent current and paid
- Business licenses renewed
- Operating agreement still accurate
- Quarterly tax payments on schedule
- Business insurance reviewed
The bottom line
Almost every LLC disaster story traces back to one of these eleven — and every one is preventable with a calendar reminder and a separate bank account. Formation is the easy part; maintenance is the real skill. Nail the boring compliance work and your LLC will protect you exactly as designed.