Quick verdict
The LLC's liability protection is real. Its tax savings by itself are typically zero. Both points matter.
Cost in Maine
| Sole Proprietorship | Maine LLC | |
|---|---|---|
| Setup cost | $0 | $175 + RA fees |
| Annual filing | $0 (file on Schedule C) | $85 |
| State tax | Pass-through | Pass-through (default) |
| SE tax | 15.3% on net | 15.3% on net (same) |
| Personal liability | Unlimited | Limited to LLC assets |
Tax treatment
Maine taxes both sole-prop and LLC pass-through profits at the same personal income tax rate (top 7.15%). No tax difference from the LLC itself. Both pay the same 15.3% self-employment tax on net earnings. Only an S-Corp election changes the SE-tax math — and you can make that election from either entity at the appropriate income level.
When the Maine LLC pays for itself
- You sign contracts or accept liability that could exceed your business cash.
- You drive for business, own equipment, or invite customers on premises.
- You take on partners — sole prop can't have co-owners.
- You want to look more legitimate to banks, customers, and contractors.
When sole prop is fine
- Pure freelance / consulting with strong contractual liability caps.
- Side income under ~$30k where the LLC's annual fees eat profit.
- Hobby-grade income.