Sigma Files
The facts below are what the maker publishes about Sigma Files, checked and dated. Our editors have not written about it yet.
Plans and prices
From Sigma Files's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Essential | $24.90 a month | Filing compliance for 1 state · dashboard access · AI-verified, cross-checked filings · $24.90/mo |
| Growth | $64.90 a month | Filing compliance for up to 3 states · dashboard access · AI-verified, cross-checked filings · $64.90/mo |
| Professional | $149.90 a month | Filing compliance for up to 7 states · dashboard access · AI-verified, cross-checked filings · $149.90/mo |
| Sales tax registration | $149, paid once | One state per registration · $149 per state; single, one-time fee |
| Custom Coverage | Priced on request | Select exactly the states you need · dashboard access · AI-verified, cross-checked filings · Priced per state |
The facts
Each one read from Sigma Files's own pages, with the date it was checked.
What it does
- AI checks
- The site says its AI checks returns against current state rules, rates, thresholds, and forms using a database updated daily.checked 9 Oct 2026
- Coverage limit
- The site lists filing plans covering 1, up to 3, or up to 7 states, with custom coverage priced per state.checked 9 Oct 2026
- Dashboard
- The filing plans include dashboard access for status, documents, and messages, and the site says filing history and confirmations are kept in a secured user dashboard.checked 9 Oct 2026
- Data collected
- The privacy policy says the service may collect contact, financial, business, and communication information to provide its services.checked 9 Oct 2026
- Deductions
- The filing process identifies eligible deductions and exemptions, and the service says it applies maximum eligible deductions.checked 9 Oct 2026
- Filing
- For registered states, Sigma Files prepares and files returns on monthly, quarterly, or annual schedules.checked 9 Oct 2026
- Filing support level
- automatedchecked 22 Sep 2026
- Jurisdictions covered
- 50checked 22 Sep 2026
- Paid from
- 24.9checked 22 Sep 2026
- Prerequisite
- A business must be registered in a state before ongoing filing there; Sigma Files says it handles registration first if needed.checked 9 Oct 2026
- Privacy and compliance
- The privacy policy says Sigma Files complies with applicable data protection laws including GDPR and CCPA.checked 9 Oct 2026
- Product
- Sigma Files provides AI-powered sales tax registration and filing services across all 50 US states.checked 9 Oct 2026
- Registration
- The service reviews nexus and prepares and submits sales tax permit applications for states where a business has economic or physical nexus.checked 9 Oct 2026
- Return filing
- Yeschecked 22 Sep 2026
- Security
- The privacy policy says the company uses encryption, secure servers, and access controls to safeguard personal and financial information.checked 9 Oct 2026
- State notices
- If a state flags a return, Sigma Files says it reviews the matter with the customer and handles the response.checked 9 Oct 2026
- Submission
- The filing goes directly to the state by its due date, and the customer receives confirmation and a record of what was submitted.checked 9 Oct 2026
- Support
- The site lists [email protected] for queries and says the company reviews state flags with customers and handles the response.checked 9 Oct 2026
- Supported tax types
- sales taxchecked 22 Sep 2026
- Tax registration
- Yeschecked 22 Sep 2026
Money
- Free plan
- Nochecked 22 Sep 2026
