We have onboarded more than 40 new Korean-American businesses in NJ and NY since 2022 — restaurants, salons, dental practices, real estate brokerages, dry cleaners, churches, even a tattoo studio. The exact same 5 mistakes show up in year 2 every time. They cost owners between $10,000 and $50,000 in fines, penalties, or missed opportunities. The mistakes are not about web design or marketing. They are about the first 90 days of legal and operational setup. This is the actual 90-day checklist we walk every new client through.
Day 1-7: LLC, EIN, bank account
Form your LLC in the state where the business will operate (don't do Delaware unless you have a specific reason — for a Fort Lee restaurant or a Flushing salon, you just form in NJ or NY). Most states let you file online for $100-200 in 1-3 business days. The same day your LLC is approved, apply for an EIN at irs.gov — if you have an SSN, you get the EIN on screen within 15 minutes. The same day you get the EIN, open a business bank account (Chase Business Complete, Bluevine, or Mercury — whichever your CPA recommends). Three things, one week.
Day 8-21: lease, insurance, sales tax permit
Sign your lease only after you have an LLC in hand — landlords will ask. Get business insurance (General Liability minimum, Workers Comp if you have any employees, Property if you own anything in the space) before you take possession of the keys. And critically — register for a sales tax permit with your state BEFORE you make your first sale. Selling without one is technically tax evasion. Most states give you the permit within 1-2 weeks online. Almost every Korean-American business owner skips this step and pays for it in year 2 when the state audit letter arrives.
Day 22-45: vendor accounts, POS, website
Open vendor accounts for the suppliers you will need (food distributors for restaurants, beauty supply for salons, dental lab for dentists). Set up your POS — Square if under $25K/month revenue, Toast if above. Build a website — Squarespace if you need it up in 2 weeks for under $20/month, Next.js custom if you are serious about long-term SEO and bilingual support. Connect your business bank account, EIN, and sales tax permit to every account you create. This is also when you set up your business credit card (Chase Ink, AmEx Business) and start putting every business expense on it.
Day 46-75: KakaoTalk Channel + Google Business Profile
Set up your Google Business Profile (free, takes 1 hour, verify by postcard or phone). This single thing drives more new customers for most Korean-American businesses than any other digital action. Then — if 30%+ of your customers are Korean-speaking — open a KakaoTalk Channel and add a QR code at your front counter. The two together cost zero per month and become your primary customer touchpoints for years. Add reviews on Google first (target 25 reviews in the first quarter), and only then ask for Yelp reviews.
The 90-day rough cost breakdown for a typical Korean-American small business
- $100-200
LLC formation
state fee + filing service
- $0
EIN
free from IRS
- $300-2,500
business insurance
per year, depends on industry
- $0-2K
first 90 days marketing
Google Business + KakaoTalk QR + flyers
Day 76-90: first marketing push
By day 75 you have a working business. Now do your first marketing push. Get 25 Google reviews from soft-launch customers (offer them a small thank-you, not a discount in exchange). Post 12 Instagram Reels or KakaoTalk Channel broadcasts over 14 days. Print 500 flyers and physically distribute them within a 1-mile radius if you are a brick-and-mortar. Do NOT run paid ads yet — you don't have enough conversion data to know what works. Earn your first 100 customers organically; you'll learn faster from them than from any paid funnel.
The 5 mistakes that cost $10K+ in year 2
The expensive mistakes we see every single new Korean-American business owner make:
- #1 — Not registering for sales tax permit before the first sale. State audit catches this 18 months later. Penalty: $5K-25K depending on uncollected tax.
- #2 — Mixing personal and business expenses on one credit card. Makes year-end taxes a nightmare and disqualifies you from clean S-Corp conversion later. Cost: $2K-5K in extra CPA fees + missed deductions.
- #3 — Paying staff under the table to "save on payroll taxes." Workers Comp claim or labor department complaint makes this $20K-50K plus criminal exposure. Don't.
- #4 — Missing quarterly estimated tax payments. IRS penalty + state penalty in year 2. Cost: $1K-8K depending on profit. Set up auto-pay quarterly the moment you have profit.
- #5 — Skipping business insurance "for a few months" to save money. One slip-and-fall lawsuit ends the business. Cost: literally everything you have built.
What we wish every new Korean-American owner knew on day 1
The biggest myth is that the hard part is opening the business. The actual hard part is the second year — when sales tax catches up, when your first employee disputes their paycheck, when an inspector finds something wrong. The 90-day setup we just described prevents 80% of that pain. The other 20% you handle by hiring the right CPA early and getting business insurance from day one. Everything else — the marketing, the website, the KakaoTalk Channel — is a multiplier on a solid foundation. If the foundation is rotten, nothing else compounds.