The cost to form an LLC for a South Portland business starts with the $175 Maine filing fee. Add annual fees, a registered agent, and local South Portland business taxes below.
Last updated: May 2026 · Data: MIT Living Wage Calculator, C2ER, U.S. Census, BLS, IRS, state and city sources
Maine charges a $175 filing fee to form an LLC and a $85 annual report each year. Maine has three income tax brackets with a top rate of 7.15%. The state indexes its brackets for inflation annually and offers a generous property tax fairness credit.
| Cost Item | Amount | When Due |
|---|---|---|
| Maine Filing Fee | $175 | One-time at formation |
| Annual report | $85 | Annually |
| Registered Agent Service | $49 to $300/year | Annually |
| Local South Portland Business License / Tax | Varies by industry | Annually |
| Operating Agreement | $0 to $500 | One-time (recommended) |
| EIN (Federal Tax ID) | Free | One-time (IRS.gov) |
Maine does not levy a local business income tax. Maine's 5.5% sales tax has no local additions, and the state requires an annual report for LLCs. Budget for sales tax collection and the annual report on top of the state LLC filing fee.
South Portland sits across the harbor from Portland and is a major retail and commercial center, home to the Maine Mall, the Portland Jetport, an oil-tanker port, and a strong residential base in the Greater Portland economy.
| Local Metric | South Portland (2026 estimate) |
|---|---|
| Metro population | 26,000 |
| County / jurisdiction | Cumberland County |
| Cost of living index (US avg = 100) | 110 |
| MIT living wage, single adult | $21.00/hour |
| MIT living wage, one earner supporting a family of four | $42.50/hour |
| Applicable minimum wage | $14.15/hour |
| Average rent, 1-bedroom | $1,650/month |
| Average rent, 2-bedroom | $2,050/month |
| Median home price | $470,000 |
| Median household income | $72,000/year |
| Combined sales tax rate | 5.5% |
| Effective property tax rate | 1.3% of value/year |
Local figures are 2026 estimates compiled from the MIT Living Wage Calculator, the C2ER Cost of Living Index, U.S. Census and Zillow housing data, and city and county sources. Verify current figures before relying on them.
The LLC filing fee is set by Maine at $175, since LLCs are formed at the state level. Add the $85 annual report (each year), a registered agent (about $49 to $300/year), and any local South Portland business license or tax. Maine does not levy a local business income tax. Maine's 5.5% sales tax has no local additions, and the state requires an annual report for LLCs. Budget for sales tax collection and the annual report on top of the state LLC filing fee.
Maine does not levy a local business income tax. Maine's 5.5% sales tax has no local additions, and the state requires an annual report for LLCs. Budget for sales tax collection and the annual report on top of the state LLC filing fee.
Plan for the $85 annual report, registered agent renewal (about $49/year), and any local South Portland business license or tax. The calculator above totals these for you.
LLCs are registered with the Maine Revenue Services at the state level, not the city. You then comply with local South Portland requirements such as a business license, zoning, and any city business tax. There is no separate city-level LLC filing.
If your business actually operates in South Portland, forming in Maine is usually simplest. Forming in Delaware or Wyoming while operating in South Portland typically forces you to register as a foreign LLC in Maine anyway, paying fees in both states.