Firstbase Review: LLC Formation, Tested (2026)

If you are a founder in Istanbul, Lagos, Bengaluru or Buenos Aires looking to open a US company, Firstbase is one of the three or four names you will keep hitting. It forms Delaware and Wyoming entities for people who have never set foot in the United States, gets you an EIN without an SSN, and hands you a dashboard. What it does not automatically do and what almost no Firstbase review mentions is file the Form 5472 your LLC owes the IRS every single year, with a $25,000 penalty attached.

We compete with part of what Firstbase sells, so read this with that in mind and hold us to it. Every dollar figure below came from Firstbase’s own public pricing page when we checked it in August 2026. Anything we could not verify is described in words rather than numbers, and where third-party review sites contradict Firstbase’s own page, we say so instead of picking the more convenient number.

The question this review actually answers: for a non-resident owner whose recurring US obligation is Form 5472 and a pro forma 1120, what does Firstbase cover, what does it leave on your desk, and what should you pair it with?

The Short Answer: Is Firstbase Worth It in 2026?

Firstbase is a good formation service and an expensive way to buy one tax return. The formation package is competitively priced and genuinely built for non-residents. The recurring products stacked on top of it registered agent, mail, accounting, tax filing are each sold separately, and that is where the real annual cost of owning the LLC lives.

The split in one line each. Buy Firstbase if you want a clean, fast, non-resident-friendly formation with an EIN handled for you and a dashboard that tracks state deadlines. Do not assume Firstbase means your IRS filings are handled the formation package does not include them, and the number of founders who discover that in their second April is the reason this article exists.

What Firstbase Actually Sells (Prices, August 2026)

Firstbase is not one product with tiers. It is a one-time formation purchase plus a menu of annual and monthly subscriptions, with a bundle that packages them together. Understanding that structure is most of the work of evaluating it.

Here is what Firstbase’s pricing page listed when we checked in August 2026 verify current pricing before you buy, since promotional rates and product names change:

Two observations. First, state fees are separate and always will be Delaware and Wyoming charge their own formation and annual fees, and those go to the state, not to Firstbase. Second, the headline formation price is the smallest number on the page. The relationship’s real cost is set by which subscriptions you keep.

What the Formation Package Includes and What It Doesn’t

Firstbase Start is a formation product, full stop. Per Firstbase’s own page it covers company formation in Delaware or Wyoming, expedited EIN setup, the essential corporate documents, assistance opening a US business bank account, a partner-perks catalogue, and ongoing support access.

Here is the part that matters for a foreign owner, stated plainly by Firstbase itself: tax filing is not included in Start. It is a separate annual product. That is not a gotcha the pricing page says so but it is routinely lost in third-party reviews that describe Firstbase as an all-in-one compliance platform.

The Gap Most Firstbase Reviews Skip

Search “firstbase review” and you will read a great deal about onboarding speed, dashboard design and perk catalogues. You will read almost nothing about the obligation that actually carries a five-figure penalty. That is not a coincidence: most Firstbase reviews are affiliate content, and affiliate content is optimised for the click that pays, which is formation, not for the compliance question that arrives eleven months later.

The obligation itself is not optional and not obscure. A US single-member LLC that is 25% or more foreign-owned is a disregarded entity that must file Form 5472 attached to a pro forma Form 1120 for any year in which it had a reportable transaction with its foreign owner. Funding the bank account is a reportable transaction. So is paying the state fee from your personal card. So is the formation payment itself which means your first year almost always triggers a filing, even if the company never earned a dollar.

The penalty under IRC §6038A is $25,000 per form, per year, with an additional $25,000 per 30-day period if the failure continues after the IRS issues notice. Against that number, every price in this review is rounding error which is exactly the reframe an affiliate review has no incentive to give you.

Firstbase’s Tax Filing Product, Priced Honestly

Credit where it is due: Firstbase names Form 5472 explicitly on its pricing page, which is more than several competitors do. It also prices the non-resident single-member case separately from the corporate case, which suggests the team understands that a foreign-owned disregarded entity is a different animal from a C-Corp.

As listed in August 2026, the Tax Filing product was $899 per year for a non-US-owned single-member LLC (including the pro forma Form 1120), and $1,799 per year for C-Corps and multi-member LLCs, where the package extends to Form 1120, Forms 1065 and K-1s, unlimited 1099s, state and city returns, and IRS extension filing. Check current pricing before you buy.

Is $899 a fair price? For a founder with genuine complexity contractors receiving 1099s, multi-state exposure, an entity that actually trades it is squarely in the normal range and well below what a US international-tax CPA typically charges. For a dormant or low-activity LLC whose entire return consists of a few owner contributions in Part V, it is a lot of money for a form with no income lines on it. That is not a criticism of Firstbase; it is the same mismatch we describe in our review of doola’s tax package, and it applies to every bundled provider in this market.

What Firstbase Does Genuinely Well

Three things, and none of them are marketing puff. First, the non-resident path is real. Getting an EIN without an SSN is the single most common place a foreign founder stalls, and Firstbase treats it as a core part of the product rather than an exception case. Plenty of cheap US formation services will take your money and then have no idea what Form SS-4 by fax means.

Second, the unbundling is honest. It is fashionable to criticise à la carte pricing, but Firstbase publishes each product with its own price, and it says outright that tax filing is not part of formation. That is more transparent than a single blended annual fee whose contents you have to reverse engineer from a feature grid.

Third, the compliance dashboard has value. State annual reports and franchise filings are exactly the kind of low-stakes-until-they-are-not deadline that founders abroad miss. Bundling registered agent with automated state reminders and filings is a reasonable product, and the distinction between a state annual report and a federal tax filing is one that trips up more founders than it should.

Where Non-Resident Founders Get Surprised

The surprises are structural rather than sneaky. Four recur often enough to be worth naming.

• Promotional formation pricing. The page we saw showed $99 against a $399 list price. Discounted entry pricing is normal, but budget against the list price and treat the discount as a bonus, because the recurring products are not discounted the same way.
• Registered agent is a separate annual line. Firstbase’s own page lists Agent Autopilot at $299 per year per state. Several third-party review sites quote materially lower registered agent figures for Firstbase; we could not reconcile the difference, so confirm what you are being charged in year two before you assume.
• “All-in-one” is a bundle, not the base product. Firstbase One packages mail, agent, accounting and tax filing, and it is priced accordingly. Formation on its own buys none of those beyond the first-year inclusions.
• Support runs through chat and email. Independent reviews report response times that are usually fast but occasionally stretch to a few days. If you are three days from a filing deadline, plan around that rather than discovering it.

The Recurring Cost Nobody Models

The mistake is comparing formation prices. Formation happens once; the LLC exists for years. What decides whether Firstbase was good value is the shape of your annual spend, and the honest answer is that it depends entirely on how many subscriptions you keep.

Sketch the two ends of the range for a Wyoming single-member LLC, using Firstbase’s August 2026 list prices and excluding state fees. A founder who keeps only the registered agent and files the federal return elsewhere is looking at a few hundred dollars a year plus the cost of that filing. A founder who keeps agent, mailbox, accounting and tax filing separately is well into four figures annually, which is roughly the problem Firstbase One’s $2,388 bundle exists to solve.

Neither number is wrong. The failure mode is picking the cheap formation, never budgeting for year two, and then quietly dropping the pieces that felt optional which is how a federal filing obligation goes unfiled. If you want to see what that costs, our penalty calculator will total up several missed years for you. It reframes every price on this page.

What No Formation Service Can Change: Form 5472 Is Paper-Only

One point of fairness to Firstbase and to every competitor. For a foreign-owned disregarded single-member LLC, the Form 5472 plus pro forma 1120 package cannot be e-filed. The IRS accepts it only by fax to (855) 887-7737 or by mail to its Ogden, Utah service center. That is a rule about the form, not a shortcoming of any vendor.

The practical consequence is the same whoever you hire: the deliverable is a PDF package that has to physically reach Ogden by April 15, or October 15 if you filed a Form 7004 extension on time. So ask any provider who performs the transmission and whether you receive proof of it. A fax confirmation page is your only real defence if the IRS later claims nothing arrived. You can read the requirement in the IRS’s own words in the Form 5472 instructions.

Firstbase Alternatives, by What You Are Replacing

“Firstbase alternatives” is three different questions, because Firstbase sells three different things. Decide which piece you are shopping for before you compare prices.

We keep the platform-versus-platform comparison qualitative on purpose: competitor plans change often and a stale figure is worse than none. For a filing-specific comparison of the services that actually produce a Form 5472, see our roundup of the best Form 5472 filing services, and for the underlying economics see filing service vs CPA cost.

Who Should Use Firstbase and Who Should Not

Match yourself to a row. The deciding variable is rarely price it is how much business your LLC actually does and how much admin you are willing to own.

Six Questions to Ask Before You Buy or Renew

These separate a good purchase from an expensive assumption. Ask them of Firstbase, of us, and of any CPA:

1. Is Form 5472 named explicitly in what I am buying? Firstbase names it in the Tax Filing product. It is not in the formation package. Know which one is on your invoice.
2. Is the pro forma 1120 included? Form 5472 is never filed alone it attaches to a pro forma Form 1120. Confirm both are prepared.
3. What does year two cost? List every recurring line: registered agent, mailbox, accounting, tax filing, state fees. Add them before you compare formation prices.
4. Who transmits the return, and do I get proof? Fax confirmation or certified-mail receipt is your only evidence against a “never received” notice.
5. What happens to prior years? Annual packages typically cover the current year only. Catch-up filings are usually priced separately.
6. What is excluded? FBAR, Form 8938, Form 8858, state income tax and your personal 1040-NR assume excluded until told otherwise in writing.

Key Takeaways

• Firstbase formation (Start) was listed at $399 one-time with a $99 promotional price displayed as of August 2026 check current pricing.
• Tax filing is not included in the formation package. Firstbase states this on its own pricing page.
• Firstbase’s Tax Filing product names Form 5472 explicitly and was listed at $899/year for a non-US-owned single-member LLC, $1,799/year for C-Corps and multi-member LLCs.
• Registered agent (Agent Autopilot) was listed at $299/year per state; third-party sites quote different figures, so confirm your renewal directly.
• Firstbase One bundles mail, agent, accounting and tax filing at $199/month billed yearly ($2,388).
• The genuine strengths are non-resident focus, EIN handling without an SSN, transparent à la carte pricing, and a state-compliance dashboard.
• Most published Firstbase reviews are affiliate content and skip the annual federal filing entirely the obligation with the $25,000 downside.
• Your first year almost always triggers a Form 5472, because formation payments and account funding are reportable transactions even at zero revenue.
• No provider can e-file a foreign-owned disregarded entity’s 5472 package fax or mail only. That is the IRS rule, not a vendor limitation.
• Model year two, not year one. Formation is a one-time number; registered agent, mail and filings repeat for as long as the LLC exists.

The Bottom Line

Firstbase is a legitimate, well-built formation service with a real commitment to founders outside the United States, and its pricing is published openly enough that you can audit it yourself which is exactly what we did to write this. If you want your Delaware or Wyoming entity and your EIN handled competently by people who have seen your situation a thousand times, it is a reasonable purchase.

Just do not confuse formation with compliance. The company that files your Articles of Organisation in March is not, by default, the company that gets your Form 5472 and pro forma 1120to Ogden the following April. Decide deliberately who owns that job Firstbase’s tax product, a CPA, a dedicated tool, or you with the About Form 5472 page open and put the deadline in your calendar today. The formation fee is the cheapest decision you will make about this LLC. The filing is the one with $25,000 attached.