If your business plan involves more than one country – selling abroad, sourcing abroad, opening a foreign subsidiary, or supporting a visa application – there’s an assumption buried in your financial projections that most founders never state explicitly: the exchange rate.
Every revenue line earned in a foreign currency, every supplier cost paid overseas, every salary in a foreign office gets translated into your plan’s base currency at some rate. Choose that rate carelessly and the rest of your spreadsheet – however meticulous – is built on sand. Lenders, investors, and immigration adjudicators all read enough plans to notice.
Here’s how to handle currency in your projections so it strengthens your plan instead of undermining it.
Why reviewers care more than you'd think
A business plan is fundamentally an argument that your numbers are credible. Cross-border numbers face an extra credibility test, because the reader knows something you can’t escape: exchange rates move, and over a three-to-five-year projection window they can move a lot.
A bank underwriting a loan wants to know your debt service survives a weaker home currency. An investor wants to know whether your gross margin story holds if your overseas manufacturing costs rise 10% in your currency through no fault of your own. And for visa business plans – E-2 and EB-5 plans especially, where applicants are often moving capital between countries and projecting revenues in a new market – the adjudicator is looking for evidence that the applicant understands the financial environment they’re entering.
A plan that silently assumes today’s exchange rate holds for five years doesn’t fail because the assumption is wrong. It fails because it signals the founder hasn’t thought about it.
Rule 1: State your rate, and source it
The fix for the silent assumption is simple: make it loud. Somewhere in your financial assumptions section, state the exchange rate(s) you’ve used, the date you took them, and where they came from.
Use a realistic transaction-level rate, not the headline mid-market rate you see in a news ticker. Businesses don’t transact at the mid-market rate – banks and payment providers apply a spread, and for smaller businesses that spread can be material. Specialist FX platforms publish comparison tools for this; SwissFx’s currency rate calculator, for example, lets you compare rates across 140+ currencies and see how transaction costs differ from the headline rate. Building your projections on a rate you could actually obtain – and noting that you’ve done so – is a small detail that reads as operational maturity.
Rule 2: Be conservative in the direction that hurts you
You don’t need to predict currency markets (nobody can, and a plan that tries looks worse, not better). You need to pick a defensible convention. The standard one: use the current rate as your base case, then shade your assumptions slightly against yourself.
If your costs are in a foreign currency, assume that currency is a little stronger than today. If your revenues are in a foreign currency, assume it’s a little weaker. This is the same logic as conservative sales forecasting – reviewers trust plans that make the author’s life harder.
Rule 3: Show a sensitivity, not a prediction
The single most effective way to handle currency in a business plan is a short sensitivity table: what happens to revenue, gross margin, and net income if the relevant exchange rate moves 5% and 10% against you.
This does three things at once. It demonstrates you understand the exposure. It shows the reader the business survives realistic adverse moves (and if it doesn’t, better that you discover that now). And it inoculates the rest of your projections – having shown the downside case, your base case no longer has to carry the burden of being “right.”
Two or three rows in your financials section is enough. This is one of the highest credibility-per-cell additions you can make to a financial model.
Rule 4: Say how you'll manage it operationally
Projections describe the exposure; a good plan also says what you’ll do about it. You don’t need a treasury strategy – a paragraph covers it. The standard tools worth mentioning, where relevant:
- Natural hedging. If you’ll have both revenues and costs in the same foreign currency, you’ll pay those costs from that revenue rather than converting twice. Free, and worth stating.
- Multi-currency accounts. Holding balances in the currencies you trade in, so conversion happens on your schedule rather than whenever a payment lands. Widely available to small businesses now through specialist providers.
- Forward contracts for known payments. If your plan includes a large committed foreign-currency outflow – equipment from an overseas supplier, say – note that you’ll fix the rate in advance for committed amounts. It converts an unknowable risk into a known cost, which is exactly the kind of trade a lender likes to see.
One sentence on each, placed in your operations or risk section, tells the reader this isn’t an exposure you’ll be discovering for the first time in month four.
The bottom line
Currency doesn’t need to be a big section of your business plan. It needs to be a visible one: a stated, sourced rate; assumptions shaded conservatively; a small sensitivity table; and a line or two on management. Together that’s perhaps half a page – and it moves your cross-border financials from the category of “optimistic spreadsheet” to the category of “founder who has done this thinking.”
In a stack of plans on a lender’s desk, that’s exactly the category you want to be in.
