Delaware LLC for SaaS from the UK (2026)

Why do UK SaaS founders form a Delaware LLC?

For a UK software founder, the motivation to form a US entity is rarely about avoiding tax — HMRC still taxes your worldwide income — and almost always about access. A Delaware LLC gives a SaaS business a recognised US legal identity that US customers, US partners, and US-centric payment infrastructure take seriously. When your buyers are in the United States, or your billing stack is built around US-dollar Stripe settlement, having a US entity removes friction that a UK Ltd alone sometimes creates.

The two pulls that come up most often are Stripe and US-dollar banking. Many founders want to bill American customers in dollars, settle into a US account, and plug into US tooling without currency conversion at every step. A Delaware LLC with an EIN, a US bank account, and a US Stripe account makes that clean. Delaware specifically is the most widely recognised US formation state, which smooths the bank and payment-processor steps that can otherwise stall an overseas founder.

It is worth being honest about what the LLC is and is not. The LLC is a corporate wrapper. It does not grant any special tax status, it is not a substitute for advice from a UK accountant, and it does not change the fact that you remain a UK tax resident. What it does is give your software business a credible US home, a path to US payments, and limited-liability separation between the company and you personally. For a software product that you sell to anyone with a card, that separation matters: contracts, terms of service, refunds, chargebacks, and any dispute with a customer or supplier sit with the company rather than landing on you as an individual, provided you keep the LLC properly separate from your personal finances.

There is also a credibility dimension that is easy to underrate. US enterprise buyers, marketplaces, and some integration partners run vendor checks and prefer to contract with a recognisable US entity that has an EIN and a US bank account. For a UK founder chasing US logos, a Delaware LLC quietly removes a procurement objection before it is ever raised. None of this requires you to relocate, hire in the US, or set up a US office — the entity exists on paper while you keep operating from the UK.

How does a UK founder form a Delaware LLC step by step?

The process is the same Delaware LLC formation path a US founder follows, routed so the EIN and banking steps work even without an SSN. For a UK SaaS founder it runs in a predictable order, and you can keep building and selling your product in parallel.

• Day 0 — Name and structure. You confirm an available Delaware name (often tied to your product or brand) and decide whether you are a single owner or have co-founders. We run the Delaware name check first.
• Day 1-2 — Certificate of Formation. We file with the Delaware Division of Corporations, pay the state fee, and your LLC legally exists in about 48 hours, with a registered agent included for year one.
• Weeks 1-4 — EIN. We submit Form SS-4 to the IRS without an SSN. This is the slowest step and the reason the overall timeline runs in weeks, not days.
• After EIN — Bank, then Stripe.With the EIN, you open a US business account, then apply to Stripe in the LLC’s name so US customer payments settle into the LLC.

See the full walkthrough on our how it works page, and the federal-ID steps in our EIN for a Delaware LLC guide. Everything is handled remotely from the UK with electronic signatures, so there is no need to travel.

How does the US-UK tax treaty affect a Delaware LLC?

This is where UK founders should slow down and get specific advice, because the headline is good but the detail matters. The United Kingdom and the United States have a comprehensive income tax treaty in force. Its business profits article (Article 7) generally means that the trading profits of a UK-resident enterprise are taxable in the US only to the extent they are attributable to a US permanent establishment — a fixed place of business in the US. A UK founder running a SaaS product remotely, with no US office, staff, or dependent agent, often does not have a US permanent establishment.

The other relevant US concept is effectively connected income (ECI): income connected to a US trade or business. Whether a remote UK SaaS business is engaged in a US trade or business, and whether the treaty’s permanent-establishment protection applies, is fact-specific. It depends on where the work is done, where servers and staff sit, and how the business operates. Because LLCs are transparent for US tax, treaty positions are typically claimed by the owner, and the mechanics can be involved.

The practical takeaway: the treaty is a genuine advantage that non-treaty countries do not have, but it is not automatic and it is not a number you should assume. Founders from countries with no US tax treaty — for example the UAE or several Gulf states — cannot lean on a business- profits article at all, and face the default 30% US withholding on certain US-source passive income even though operating SaaS revenue is usually treated as foreign-source. As a UK resident you are in a better position because the treaty exists, but the protection still has to be claimed correctly and supported by your facts. Do not rely on a blog’s figure for any withholding rate, and do not assume the treaty zeroes out every US touchpoint automatically. Confirm your specific treaty position with a CPA who handles US-UK cross-border matters before you file anything.

Our Delaware LLC taxes overview and our Delaware LLC for non-residents guide set out the general US picture, but treat them as orientation rather than a substitute for advice tailored to your numbers. The combination of treaty interpretation, the ECI question, and how the UK relieves any US tax you do pay is precisely the kind of cross-border knot that a specialist untangles in an afternoon and a generalist gets wrong over months.

Does a UK founder still owe UK tax through a Delaware LLC?

Yes — and this is the point most often misunderstood. A Delaware LLC is not a tax shelter. As a UK resident you are taxed by HMRC on your worldwide income, so profit you earn through a US LLC remains within the UK tax net. Forming offshore or in another US state does not change your UK residence or your UK obligations. Anyone telling you a US LLC lets a UK resident escape UK tax is wrong, and following that advice creates real risk.

There is also a technical wrinkle worth flagging: HMRC may treat a US LLC as either transparent or opaque depending on the facts, which affects how the income is reported in the UK and how any US tax you pay is relieved against your UK liability. The distinction is not academic — it changes whether you are taxed on the LLC’s profits as they arise or on distributions you take, and whether US tax credits flow through cleanly. This is exactly the kind of question where a UK accountant who has handled US LLCs earns their fee. Get the UK treatment confirmed early, ideally before your first full tax year, so your records and filings line up on both sides.

A simple rule keeps you out of trouble: treat the Delaware LLC as a structure that organises where and how you do business, not as a device that reduces what you ultimately owe as a UK resident. Founders who go in with that expectation are rarely surprised at tax time. Founders who form a US LLC believing it makes their income invisible to HMRC are setting up a problem that compounds with every year of unreported worldwide income.

How do Stripe and US banking work for a UK SaaS LLC?

Getting paid is the part most founders care about, and it comes down to two things: a US business bank account in the LLC’s name, and a US Stripe account that settles into it. Once your EIN is issued, US fintech banks open business accounts for non-residents entirely online. The common choices are Mercury, Relay, and Wise, none of which require a US visit. Approval is always the bank’s decision, so your specialist helps you apply to more than one until you are live with at least one account.

With a US account connected, you apply to Stripein the LLC’s name to bill US customers in dollars. Stripe approval is Stripe’s decision and is not guaranteed — there is no approval percentage anyone can promise you. The way to give yourself the best chance is a clear description of your software product, consistent details across documents, and an account opened only after the EIN is issued. If your customers are mainly in the UK and EU, Stripe UK alongside a UK Ltd may suit you better, which is one reason some founders run both entities. For a deeper comparison of accounts, see our Delaware LLC banking guide.

There is no single best setup — the right one depends on where your customers are and which currency you want to settle in. Approval is never guaranteed for any account, but the table below reflects which path tends to fit which founder profile. Choose where you fit best, and keep a backup ready in case a first application is declined. If a US fintech account is delayed while your EIN is still processing, a Wise or Payoneerbalance is a common interim way to receive payouts, again subject to the provider’s own approval.

Whatever you choose, the prerequisites for the US side are the same: a formed Delaware LLC, a finished EIN, a clear description of your SaaS product, and consistent details across every document. Get those right and most founders open US banking within 1 to 5 business days, then apply to Stripe.

What US taxes and filings does a UK SaaS LLC face?

By default, a single-member Delaware LLC is a pass-through (disregarded entity) for US federal tax: the company itself pays no income tax, and any taxable profit is attributed to the owner. Whether a UK owner has a US income tax liability depends on the ECI and permanent-establishment analysis above, which is why a cross-border CPA matters. Even where no US income tax is due thanks to the treaty, two obligations remain constant.

The first is the federal Form 5472for foreign-owned single-member LLCs, covered below. The second is Delaware’s flat $300 franchise tax, due June 1 each year, explained on our Delaware franchise taxpage. Note that the “authorized shares” and “assumed par value” franchise-tax methods you may read about apply to Delaware corporationsonly — an LLC simply pays the flat $300. Sales tax on SaaS is a separate question that depends on your US customers’ states and economic-nexus thresholds, and is best handled with a US sales-tax specialist rather than assumed away.

Form 5472 deserves its own explanation because it is the filing most UK owners of a US LLC must not miss. If you are a non-US person owning 25% or more of a single-member Delaware LLC treated as a disregarded entity, the IRS requires Form 5472 each year, attached to a pro-forma Form 1120. It reports reportable transactions between you and your LLC — including the capital you contribute to fund the business. The deadline is April 15, extendable to October with Form 7004.

The reason to take it seriously is the penalty: failing to file Form 5472 carries a $25,000 penalty under IRC section 6038A. That applies even if your LLC made no profit and owed no US income tax, because 5472 is an information return, not a tax payment. We track this deadline and remind you; the detail is in our Form 5472 for Delaware LLCs guide. If you later want a US C-Corp structure for fundraising instead, our Delaware C-Corp guide explains how that differs.

Delaware LLC or UK Ltd for a SaaS business?

This is the comparison nearly every UK SaaS founder weighs, and the honest answer is that the two are not mutually exclusive. A UK Ltd is the natural default if your customers, team, and banking are UK-based and you want the simplest tax position. A Delaware LLC earns its place when US-dollar Stripe settlement, a recognised US entity for US customers and partners, or a US base for later fundraising matter to you. Many founders eventually run both — a UK Ltd for UK operations and a US entity for US revenue.

If your goal is to raise from US venture investors, note that they usually expect a Delaware C-Corp rather than an LLC, so an LLC may later convert. For most bootstrapped or revenue-funded UK SaaS founders, the LLC is the right starting wrapper. Whichever you choose, confirm the structure with a cross-border accountant before committing, because the best answer depends on where your revenue and costs actually sit.

To make the sequence concrete, picture a London-based founder selling a B2B analytics tool to mostly US customers. The first move is forming a Delaware LLC under the product name, so the entity that signs US customer contracts and owns the Stripe account is a clean US company. With the LLC filed in about 48 hours, the EIN application goes to the IRS and arrives in 2 to 4 weeks. While that processes, the founder keeps shipping features and onboarding early customers on a temporary billing setup, losing no time. Once the EIN lands, the founder opens a US business bank account in the LLC’s name and applies to Stripe, settling US-dollar revenue into the US account. Year one cost is the flat $397. Going forward, the founder budgets Delaware’s $300 franchise tax each June 1, files Form 5472 annually by April 15, and works with a UK accountant and a US cross-border CPA so the treaty position and HMRC reporting line up. Nothing here is exotic — it is the standard shape of a well-run UK SaaS business with a US billing entity.

What are the most common mistakes UK SaaS founders make?

Formation itself rarely fails — Delaware accepts properly filed paperwork routinely. The friction shows up at the bank, at Stripe, or later at tax time, and the causes are predictable. Knowing them in advance is the easiest way to stay out of trouble.

• Applying to the bank or Stripe before the EIN is issued. This is a frequent early decline. Wait for the IRS number first.
• Assuming the LLC removes UK tax. HMRC taxes your worldwide income as a UK resident; the LLC does not change that. Confirm the UK treatment with an accountant.
• Quoting a treaty rate you found online. Treaty positions are fact-specific. Do not state a withholding number — confirm it with a US-UK CPA.
• Ignoring Form 5472. Foreign-owned single-member owners who skip it risk the $25,000 penalty even with zero profit. Calendar it every April 15.
• Forgetting SaaS sales-tax nexus. Some US states tax software and apply economic-nexus thresholds. Track it with a sales-tax professional as you scale.

Almost every one of these is avoidable. We help you sequence the steps in the right order, keep details consistent across documents, and apply to a second bank or payment provider if the first declines — because each reviews independently, a no from one is not a no from all.

How much does a Delaware LLC cost a UK SaaS founder?

Our service is a single flat fee of $397, and the Delaware state filing fee is already included — there is no separate state charge to add on. That one payment covers the Certificate of Formation, the EIN application, a registered agent for year one, your operating agreement, US bank and Stripe application support, and compliance tracking, all with WhatsApp support. There is no US annual report for an LLC, so your only recurring state cost from year two is the franchise tax.

That makes year two roughly the $300 franchise tax plus about $99 to renew your registered agent. Miss the June 1 deadline and Delaware adds a $200 penalty plus 1.5% interest per month, and your LLC loses good standing — which is exactly why we track the date for you. For the full pricing picture, see our Delaware LLC cost breakdown. Remember that US-side filings such as Form 5472 and any UK accountant fees are separate costs you should budget for as a cross-border founder.

A note on BOI / FinCEN beneficial ownership reporting

Beneficial ownership reporting under the Corporate Transparency Act has changed significantly and remains in flux. In March 2025, FinCEN issued an interim final rule that removed BOI reporting obligations for US domestic reporting companies. Under that rule, only foreign reporting companies registered to do business in the US must report, and US-formed domestic entities are generally exempt.

Because this area is evolving and the rules may shift again, do not treat any summary as final. Before relying on your filing status, confirm the current FinCEN requirements at the source or with a professional. We monitor these changes and flag them to the UK founders we work with, but the responsibility to file if required ultimately rests with the company owner. You can start the whole formation process remotely from the UK and add a US tax adviser and your UK accountant alongside it.