LLC Review Desk's 2026 picks for registered agents in Washington, favorite first, are Mainstay Filing ($149 a year) and WA Registered Agent.org ($99 a year). Mainstay Filing is our favorite, because you pay $149 a year whether you stay in one state or grow, and your first three government letters each year are scanned free.
By the LLC Review Desk editorial team
Position 1
Top pick on this page
1. Mainstay Filing: best for all fifty states
$149 a year, the same each year
Our score
9.3out of 10
9.3 out of 10
Our favorite is Mainstay Filing, because it's $149 a year and the price doesn't climb at renewal, plus papers served on the company get scanned the same business day for free.
Starting from scratch? The $199 yearly package adds the Washington filing and the annual report.
Over three years it costs $150 more than WA Registered Agent.org, and for us the extra things it handles are worth that.
In the price
A street address on the public record in your state
No-charge scans of served papers on the day they arrive
The first three government mailings you receive each year are scanned for free
Compliance reminders
What we like
Your first three government letters each year, scanned for free
Same-business-day scans of papers served on the company, no charge
Fine for LLCs, corporations, LPs, LLPs and nonprofits
$149 a year and it stays flat
Trade-offs
The agent plan alone is $50 a year more than WA Registered Agent.org
Unless you buy the formation package, you file the annual report yourself
Our scores out of 10 are editorial: LLC Review Desk sets them using the criteria on How we rank. They aren't customer ratings.
What Washington registered agents cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Same price when you renew
Mainstay Filing
$149
$149
$149
$447
Yes
WA Registered Agent.org
$99
$99
$99
$297
Yes
We took each price from the company's own pages on November 12, 2026. Washington's own fees stay the same no matter which agent you choose.
How the order came together
Two things count most to us, three-year cost and filings in the price, at 29% each. Renewal price, state fit and up-front totals share 42%, and Washington came down to filings in the price.
Mainstay's plan does more: it scans papers served on the company the same business day, free, and the price is the same in all fifty states, with three government letters a year scanned at no charge. WA Registered Agent.org costs less, so it's a close race.
You can read every criterion and weight on How we rank.
What Washington says about the registered agent (via Washington Secretary of State)
Every LLC must name a registered agent with an in-state street address. The address has to be a physical street address in Washington. P.O. boxes and private mailboxes are not accepted. The law: RCW 23.95.415.
The Washington annual report: when and how much
Here's the schedule: the annual report is due every year in Washington, by last day of the entity's anniversary month. It costs $70. If you're late, add $25. Reminders from the state go to your registered agent.
Your questions about Washington registered agents
Do I really need a registered agent for a Washington LLC?
You do. Washington won't accept an LLC without a registered agent who has a street address in the state, and that name goes on the public record.
What do Washington registered agents usually cost per year?
Plan on $99 to $149 a year, and each service keeps its price when you renew.
Can I be my own registered agent?
Sometimes, if you meet the state's rules. A commercial registered agent listed with the Secretary of State, a noncommercial agent (any person or business with a Washington address), or the holder of a named position in the company. The agent consents in advance.
When do I have to send in the Washington annual report?
Mark last day of the entity's anniversary month on your calendar. The state's charge is $70, and sending it late tacks on $25.
Which registered agents did we review here?
Mainstay Filing ($149 a year) and WA Registered Agent.org ($99 a year), with our favorite first.
Who is the best registered agent for Washington?
Mainstay Filing, because one plan, $149 a year, follows the company to any state and renews at $149.