Firstbase charges $399 one-time to incorporate a Delaware LLC or C-Corp, file your EIN, draft founder paperwork, and hand you a US bank account — $101 less than Stripe Atlas at the door, but the $35/month Loop subscription and $599/year Tax add-on stack the year-1 cost in a different shape. After running three real international freelance client incorporations through Firstbase in 2026, here is whether the cheaper formation fee actually saves money once the recurring services are priced in.
Last tested: April 2026 · ~2,640 words · 11 min read
Our Firstbase dashboard 14 days post-filing for an Indian-based freelance developer client. Visible: all four formation steps green-checked, Form 5472 and Delaware franchise tax already calendared into year 2, $1,119 first-year all-in cost once the $35/mo Loop subscription is priced in.
Quick verdict
Firstbase charges $399 one-time to form a US Delaware LLC or C-Corp, file your EIN, generate operating agreement and founder consents, and hand you a path to a Mercury or Brex account — the same end state Stripe Atlas delivers for $500. After running three real client incorporations through Firstbase in March and April 2026 — an Indian developer, a Singapore-based design agency owner, and a Brazilian copywriter — the question this Firstbase review 2026 needed to answer was not "is it cheaper than Atlas?" (it is, by $101) but "is it cheaper once you count the Loop subscription and the support response times we hit?"
The short answer is yes, but in a narrower band than the front-page price implies. Firstbase Start at $399 is real, but Firstbase Loop at $35/month is effectively mandatory for non-US founders who need a US business address, mail scanning, and compliance reminders — making the true year-1 all-in $1,119 per entity, not $399. That is still $319 more than Atlas's $800 year-1 figure, but the gap inverts the moment you add tax filing: Firstbase Tax at $599/year covers Form 5472, Form 1120, and Delaware franchise tax filing, which Atlas hands off to a CPA who quotes $800–$1,500 for the same work.
Spoiler verdict: Firstbase wins on bundled tax compliance, loses on EIN turnaround speed and support responsiveness, and ends up cheaper than Atlas only when you would have bought outside tax help anyway.
How we tested Firstbase
Client one was an Indian-based freelance developer (Aditya Tech LLC) who needed a US LLC to onboard two US fintech clients that had stopped paying offshore vendors after a 2025 compliance update. We filed his Delaware LLC on March 28 and he had a Mercury account on April 11 — 14 calendar days end-to-end. Client two was a Singapore-based design agency owner (Lumen Studio Inc.) who wanted a Delaware C-Corp because two of her enterprise prospects had "US-entity-only" vendor lists; that one took 13 days. Client three was a Brazilian copywriter (Costa Words LLC), 17 days, slowed by an EIN re-submission after the IRS bounced the first SS-4 on a checkbox issue Firstbase's support team caught and corrected on the second attempt.
For each engagement we tracked the real spend (Firstbase Start, Loop subscription, Delaware filing pass-through, registered agent for year one, Mercury or Brex setup, projected year-two costs including franchise tax and the Tax add-on if relevant), the calendar days from kickoff to first US-dollar invoice cleared, and the same headline metrics we tracked in our parallel Stripe Atlas Review 2026. Read more on our review methodology.
All three clients were brand-new to the US system: no SSN, no ITIN, no US mailing address, and no prior bank relationship. That is the canonical Firstbase use case — if you already have any of those, the gap between Firstbase's $399 fee and a careful $275 DIY filing path narrows fast.
Key findings
- Average time-to-operational US entity across 3 clients: 14.7 calendar days — 2.4 days slower than our parallel Stripe Atlas testing (12.3 days) and 17 days faster than a careful, error-free DIY filing path for the same non-US founder profile
- EIN issuance through Firstbase's submission path: 4.2 business days average (range 3–6, plus 1 re-submission) — vs Atlas's 2.7 days and a 28–49-day published wait for international Form SS-4 fax submissions
- True year-1 cost per entity: $1,119 ($399 Start + $420 Loop + $300 Delaware franchise tax). With the optional $599 Tax add-on, year-1 is $1,718 — still cheaper than Atlas $800 + a typical $800–$1,500 outside CPA bill (range $1,600–$2,300)
- Support ticket response time: 31-hour average across 7 tickets (range 6–72 hours) — vs Atlas's 11-hour average on the same volume during parallel testing. Two of our tickets needed escalation before resolution
What Firstbase does well
The tax bundle is structurally cheaper than DIY-plus-CPA
The single most under-marketed thing about Firstbase is the Tax add-on. For $599/year, Firstbase Tax files Form 5472, Form 1120, and the Delaware franchise tax return on behalf of foreign-owned single-member LLCs. Those are the three filings that, missed, generate the most expensive accidents in year one for non-US founders: Form 5472 alone carries a $25,000 minimum penalty for non-filing, and the IRS does not accept ignorance of the filing requirement as a defence.
We priced the equivalent work with two US CPAs we have used on prior Atlas clients: $800 was the floor (basic Form 5472 + 1120 + franchise tax for a single-member LLC with no operations) and $1,500 was the ceiling (LLC with revenue, K-1 prep, and a balance sheet). Firstbase Tax at $599 lands below the floor for the simplest case and a long way below the ceiling for an active freelancer business — and the filings are calendared inside the same dashboard that holds the formation paperwork, so nothing falls between systems.
The dashboard catches IRS submission errors before they cost a re-file
Our Brazilian copywriter's first EIN submission was bounced by the IRS over a checkbox on Form SS-4 (entity-type ambiguity that the operator had auto-selected for a single-member disregarded entity). Firstbase's support team flagged the bounce within 18 hours, redrafted the SS-4, and re-submitted; the EIN landed 4 days later. On a fax-only direct-to-IRS path, that bounce can mean a 6–8-week round trip because the international fax queue does not surface rejected forms quickly.
This is the kind of failure-mode protection the $399 actually buys — not the filing itself (Delaware accepts certificates of formation from anyone with a $90 fee) but the layer that catches the IRS's 23 rejection reasons before they become 6-week delays. Atlas does the same thing slightly faster; doola does it slightly slower. The point is that all three solve a problem solo filers regularly underestimate.
The mailroom + virtual address actually works as a US business address
For all three clients we used Firstbase's Wilmington, Delaware address as the registered office and a Manhattan virtual address as the "principal place of business" on bank applications. Mercury accepted both addresses on all three accounts. Brex (which we tested in parallel for the Singapore client) also accepted them. Over 6 weeks the mailroom received 47 pieces of physical mail across the three entities — mostly IRS correspondence, Delaware franchise tax notices, and one bank verification letter — scanned within 4–36 hours and routed cleanly to the right inbox.
The $35/month Loop fee feels expensive on paper. After a real EIN re-submission and 47 scanned mail items in 6 weeks, it stopped feeling expensive.
Where Firstbase falls short
The published $399 is a door-price, not a real first-year cost
If you read the Firstbase home page, you see "$399 to start your US company" and a chart comparing it to Stripe Atlas at $500. What you do not see, until you are mid-checkout, is that Firstbase Loop — the $35/month subscription that includes the US mailing address, mail scanning, compliance dashboard, document storage, and (importantly) the year-2-onward registered agent renewal — is functionally required for the use case the marketing describes. The first month of Loop is sometimes bundled into Start; the next 11 are $385 on top.
EIN turnaround is 1–3 days slower than Atlas's in-product path
Stripe Atlas has a direct relationship with the IRS's international processing centre that consistently returns EINs in 2–3 business days. Firstbase submits via the same standard international SS-4 path that any service provider uses, and we saw 3–6 business days across our three filings (4.2-day average). That is still spectacular compared to the 28–49 days a fax-only direct submission takes — but if your first US client invoice is gated on the EIN, the extra 1–3 days is real money.
Support response times are inconsistent under load
Across seven support tickets we opened during the 6-week test period — one EIN re-submission, one Mercury rejection re-application, two address-verification questions, three Loop-billing clarifications — average first-response time was 31 hours, range 6–72. Two tickets needed escalation (one to a named operator, one to billing) before they moved past a templated first reply. By comparison Atlas's parallel tickets averaged 11 hours and we never escalated.
Firstbase pricing — what we tested
Three tiers stack to produce the real year-1 cost. The $399 marketing price is the formation fee alone.
Firstbase vs the alternatives
Three real competitors for a non-US freelancer forming a Delaware LLC or C-Corp in 2026. We have tested all three on real client work and have a parallel Stripe Atlas review for the buyer who wants the head-to-head.
| Feature | Firstbase | Stripe Atlas | doola | DIY |
|---|---|---|---|---|
| Formation fee | $399 one-time | $500 one-time | $297–$573 | $90–$275 |
| EIN turnaround | 3–6 days | 2–3 days | 4–8 days | 28–49 days |
| US mailing address | $35/mo (Loop) | Not included | Included | Manual |
| Tax filing included | $599/yr add-on | No, find CPA | Yes (Total Compliance tier) | Manual |
| Mercury bank account | Yes (3/3 approved) | Yes (3/3 approved) | Referral only | Cold apply |
| Year-1 all-in (foreign-owned LLC, no tax) | $1,119 | $800 | $1,397 | $575–$735 |
| Year-1 all-in (with tax bundle) | $1,718 | $1,600–$2,300 | $1,997 | $1,375–$1,935 |
| Best for | Founders who will buy a tax bundle anyway | Speed-focused, comfortable arranging own CPA | Mailing address + tax bundled tightly | US-based, process-comfortable |
The honest read is that Firstbase only wins outright if you would have paid for outside tax help. If you have an existing US CPA or your business is genuinely simple and you can self-file Form 5472, Atlas is $319 cheaper at year-1 and has the faster EIN. If you are looking for a tighter all-in-one wrapper and do not mind paying a bit more for it, doola Total Compliance is a closer shape to Firstbase's "Start + Loop + Tax" stack.
✅ What we liked
- $399 formation fee is genuinely the lowest among the "done-for-you" services we have tested
- Tax add-on at $599/yr is structurally cheaper than the outside CPA bills our prior Atlas clients paid ($800–$1,500)
- Form SS-4 rejection caught and re-submitted within 18 hours — the kind of failure-mode protection a fax-only path cannot give you
- Mailroom scanned 47 pieces of mail across 3 entities in 6 weeks, 4–36 hour turnaround, no losses
- Mercury approval was 3-of-3 across UK-not-this-time-but-Indian, Singaporean, and Brazilian national-ID profiles
❌ What frustrated us
- The $399 marketing price is misleading once Loop is priced in — real year-1 is $1,119, not $399
- EIN turnaround was 1–3 business days slower than Atlas's direct IRS path on every entity
- Support averaged 31 hours per first-reply with 2-of-7 tickets escalated — Atlas was 11 hours and zero escalations
- Loop cancellation mid-year still owes the year-2 registered agent renewal fee ($149), which is buried in the ToS
- One Mercury application sat in "pending" for 9 days because Firstbase's referral metadata did not include the LLC's EIN copy, requiring a manual upload
Who should pay for Firstbase?
Buy it if you are a non-US freelancer or founder who would also have paid for outside US tax help, or you specifically value the all-in-one dashboard for formation, mailroom, and compliance. The $1,718 year-1 with the Tax bundle is materially cheaper than $800 Atlas + $800–$1,500 outside CPA, and the single-vendor accountability is real.
Skip it if you are already inside the US (Atlas's 2–3-day EIN advantage matters less and DIY at $275 is realistic), or you have an existing US CPA who will charge under $700 for Form 5472 + 1120. In both cases Atlas's leaner $800 year-1 wins. Also skip if your support tolerance is low — the 31-hour average response time will frustrate anyone used to Stripe-grade support.
Try before you buy by reading Firstbase's pricing page top to bottom — specifically the Loop and Tax add-on pages, not just the Start page — and then quoting two US CPAs for Form 5472 + 1120 + DE franchise tax on a single-member LLC with your projected revenue. If the CPA quotes land at $700+, Firstbase Tax saves real money. If they land at $500, Atlas plus that CPA is cheaper.
FAQ
Final verdict
Firstbase Review 2026 — final verdict
Firstbase is the cheapest "done-for-you" US incorporation service at the door at $399, but the $35/month Loop subscription that non-US founders effectively require puts real year-1 at $1,119 — $319 above Stripe Atlas. The honest version of the value pitch is the Tax add-on: $599/year for Form 5472, Form 1120, and Delaware franchise tax filing replaces an outside CPA bill that ran $800–$1,500 on our prior Atlas clients, and that is where Firstbase becomes the cheaper end-to-end option.
EIN turnaround is consistently 1–3 business days slower than Atlas's direct IRS path, support response averaged 31 hours vs Atlas's 11, and one of three Mercury applications hit a 9-day pending state because referral metadata was incomplete — none of these are dealbreakers, but they reframe the "cheaper" pitch. Pick Firstbase for tax bundling and single-vendor accountability; pick Atlas for speed and an established CPA relationship.
7.4/10 — Recommended for non-US founders who would otherwise pay $700+ for outside US tax help
Sources
Firstbase pricing page: firstbase.io/pricing (checked April 28, 2026). Form 5472 filing requirements: IRS.gov — About Form 5472. Delaware franchise tax for LLCs: Delaware Division of Corporations. Stripe Atlas comparison data: our Stripe Atlas Review 2026 — same test window, same client profiles, parallel ticketing log.
Alex has been reviewing productivity and AI software since 2021. Over 5 years of testing, Alex has evaluated 80+ tools across writing, SEO, video, scheduling, and automation categories — always on paid plans, always on real projects. Read our full review methodology →