Get an EIN for Your South Dakota LLC — Free at IRS.gov (2026)
Your EIN is your LLC's federal tax ID — required for banking and hiring. It's 100% free at IRS.gov and takes about 15 minutes. Since South Dakota has no state income tax, the follow-up sequence here is genuinely the shortest in this series.
Apply for your EIN free at IRS.gov — never pay a third party. With an SSN or ITIN, the online application takes about 15 minutes and issues your EIN immediately. Without one, file Form SS-4 by fax (≈4+ business days) or mail (≈4+ weeks). Apply after your Articles are approved so IRS records match your exact legal name and formation date. Because South Dakota has no state income tax, there’s no state tax registration to complete afterward — only sales tax registration if you sell taxable goods.
- Cost
- $0 — always free
- Where
- IRS.gov only
- Online time
- ~15 minutes
- Online issuance
- Immediate
- No SSN? (SS-4 fax)
- ~4+ business days
- State income tax registration?
- None needed — SD has none
What an EIN Is (and Why Every South Dakota LLC Needs One)
An EIN (Employer Identification Number) is the nine-digit federal tax ID the IRS assigns your business. You need one even with zero employees:
- Open a business bank account — every bank wants the EIN letter, your confirmed Articles, and your operating agreement.
- File federal taxes — including the 15.3% self-employment tax that applies regardless of state.
- Register for sales tax — only if you sell taxable goods, since South Dakota has no income tax registration to worry about.
- Protect your SSN — put your EIN on W-9s instead of your personal number.
Never pay for an EIN. The IRS charges nothing. Sites charging $50–$300 for "EIN filing" resell a free government form, often styled to look official. The only site you need is IRS.gov.
Which Application Method Should You Use?
EIN Path Picker — South Dakota Edition
2 questions · your exact path and timeline
The IRS online assistant runs Mon–Fri during posted hours and issues one EIN per responsible party per day. All methods are free.
The Online Application, Step by Step
Wait for approval first
Your EIN must match your final legal name and formation date. File through the Secretary of State first — online processing runs about 1 business day.
Go to the IRS EIN Assistant
IRS.gov → "Apply for an Employer ID Number." Choose "Limited Liability Company," then South Dakota.
Enter members and responsible party
Member count sets your default classification — disregarded entity for one member, partnership for two-plus — and the responsible party provides their SSN/ITIN.
Complete in one session
The application times out after 15 idle minutes with no save. Keep your confirmed Articles in front of you.
Download the CP 575 immediately
Your confirmation letter displays once. Banks will ask for it; a replacement means calling the IRS for Letter 147C.
No SSN? You Can Still Get an EIN
Non-US founders complete Form SS-4, write "Foreign" on line 7b, and submit by fax (~4+ business days) or mail (~4+ weeks). Line-by-line help in our guides to EINs without an SSN and foreign-owned LLCs. Foreign-owned single-member LLCs: remember Form 5472 — a $25,000 penalty applies even at zero income.
After You Get Your EIN — the Short South Dakota Sequence
- Open your business bank account — CP 575, confirmed Articles, operating agreement.
- Register for sales tax only if selling taxable goods — no separate income tax registration exists.
- Note your anniversary month for your annual report next year.
Ahmad Adil's Take: the EIN is the one step where "cheap" and "right" are the same thing — free, from the source, in fifteen minutes. If any site or upsell asks you to pay for it, that tells you exactly how they make money. South Dakota's follow-up sequence is genuinely the shortest in this whole series: bank account, and that's essentially it unless you're selling taxable goods. Enjoy the simplicity — most states ask for considerably more paperwork after this point.
- ✓Forms your South Dakota LLC for $39 + the $150 state fee
- ✓Files online with the Secretary of State
- ✓Free South Dakota registered agent the first year
- ✓No upsells · No data selling · Privacy by Default
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South Dakota LLC — FAQ
Ahmad Adil is the founder and CEO of LLC School. The figures here — the $150 Articles of Organization, the $50 annual report due your anniversary month, and South Dakota having no personal income tax at all — reflect current South Dakota Secretary of State guidance. This is educational content, not legal or tax advice.
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