What US expansion actually costs a UK e-commerce brand

Every few weeks a British brand announces it is opening in the States, and a founder somewhere decides this is the year they crack America too. It is usually a good instinct. The market is enormous and your product may well travel.

The problem is that the costs founders budget for are the obvious ones, and the costs that hurt are the ones nobody mentions in the press release. Here is what we would want modelled before anyone commits stock to a container.

The bit everyone budgets for

Freight, duty on the way in, a US warehouse or 3PL, domestic shipping rates, and a bit of marketing to get going. These are real numbers and they are usually estimated reasonably well, because they arrive as quotes. Someone gives you a price and you put it in a spreadsheet.

If your plan only contains these, it is not a plan yet. It is a shipping quote.

Sales tax is not VAT, and it will surprise you

This is the one that catches British founders most often, because we are used to a single national VAT system with one registration and one return.

US sales tax is set state by state. There are thousands of taxing jurisdictions once you count counties and cities. You can create an obligation to register and file in a state you have never set foot in, simply by selling enough into it, which is what people mean by economic nexus. Many states set that trigger at around $100,000 of sales, though the thresholds vary by state and change over time, and holding stock in a state can create an obligation on its own.

Two practical consequences. If you use a US fulfilment centre, the location of your stock matters, not just where your customers are. And the admin is per state, so the cost is not one registration, it is a growing pile of filings that someone has to own.

Returns and duty work against each other

Your landed cost per unit looks fine until you put a realistic return rate through it. In apparel and footwear, returns are not a rounding error, and a garment that comes back has already cost you the outbound freight, the duty and the fulfilment fee.

Worse, a returned item sitting in a US warehouse is stock you have paid to move four thousand miles and cannot easily sell at home. Model the return rate you actually have, not the one you would like, and model what happens to the item afterwards.

You will be funding two cycles at once

Buying stock always ties up cash, wherever you sell it. That is not a US problem, it is an e-commerce problem, and we have written about why a profitable brand can still run out of cash separately.

What is specific to expansion is that the American cycle does not replace your existing one, it sits on top of it. Your UK stock still needs buying on the same schedule as always. Meanwhile the US cycle is longer at almost every stage: sea freight instead of a domestic courier, customs clearance, and stock waiting in a warehouse four thousand miles from your existing customers.

So for a period you are funding two businesses at once, and the newer one is slower to pay you back. A brand that is comfortably profitable at home can find itself unable to pay for its next UK order, purely because the cash is on a boat.

Reliefs worth knowing about

There are legitimate mechanisms that stop you paying duty twice on the same goods. Inward Processing is the one we reach for most often: broadly, it lets you bring goods into the UK, do something with them, and send them out again without duty applying as it otherwise would. We have used reliefs like this to reclaim and avoid customs duty for brands importing and re-exporting.

The details matter and the rules are specific, so this is one to check against the current guidance and your own circumstances. HMRC publishes the position on GOV.UK. The point is simply that most founders have never heard of it, and it is real money.

So how do you decide?

Build the forecast before you commit, not after. Specifically: a cash forecast that runs the US cycle alongside your UK one, a landed cost per unit that includes returns, and an honest view of who is going to own the sales tax filings.

None of this means don't. Plenty of British brands do very well in the States. It means the decision is a cash decision rather than a shipping decision, and it deserves a model rather than a gut feel.

If you are weighing it up and would like the numbers looked at properly before you commit, that is exactly the sort of thing a Deep Dive Review is for.