The best registered agents across the US in 2026 are Mainstay Filing ($149 a year), IL Registered Agent.org ($99 a year) and Alabama Registered Agent.co ($99 a year), in that order. Why Mainstay Filing is on top: a flat $149 yearly fee for an agent anywhere.
Posted fees, November 12, 2026; the two state services price their own state only. State fees are extra.
State fees on top
Yearly state fees for an LLC start at $0 and top out at $810. They go on top of every pick. Full list: Registered agent rules by state.
How the order was set
Each fee is scored on three-year cost, filings covered, renewal, state fit and transparency. A national list favors the service that works wherever you file. IL Registered Agent.org (Illinois) and Alabama Registered Agent.co (Alabama) win on price in their own states.
Desk order: Mainstay Filing, IL Registered Agent.org and Alabama Registered Agent.co.
How much does a registered agent cost?
Low end $99, high end $149 a year.
How much do state fees vary?
Yearly state fees for an LLC start at $0 and top out at $810.
Can one service cover every state?
Just Mainstay Filing, at one fee in all states.
Why are single-state services on a national list?
Inside its home state, a local service may be the smarter purchase. IL Registered Agent.org is our pick for Illinois businesses; Alabama Registered Agent.co for Alabama businesses.
How did you choose the order?
By five weighted criteria: three-year service fees, filings covered, renewal, state fit and fee transparency.