Setting Your Budget Rate
Your budget rate is the exchange rate you assumed when you priced a deal, built your forecast, or signed off the annual plan. It is the line in the sand your margin is measured against. If the market ends up worse than your budget rate, the money has to come from somewhere, usually your margin.
Every business with foreign-currency costs or revenue already has a budget rate, whether or not anyone wrote it down. Writing it down is the whole point: it turns "the pound moved" into a number you can manage.
How To Choose One
There is no single correct answer. Three approaches cover almost every business.
1. The current forward rate for the period. Take today's indicative forward rate for the date your money actually moves, and use that. Many teams find this the easiest to defend, because it is the rate that could realistically be locked in today. If you then hedge, your plan and your hedge match exactly.
*Trade-off:* it changes every time you rebuild the plan, so your budget rate moves with the market rather than anchoring it.
2. A conservative buffer below spot. Take the current rate and give yourself room on the unfavourable side, for example 2% to 5%. If you are a UK importer buying dollars, you budget at a weaker pound than today's.
*Trade-off:* it builds a cushion into your pricing, but too big a buffer prices you out of deals against competitors who are less cautious.
3. Last year's average rate. Use the average you actually achieved over the previous 12 months.
*Trade-off:* it is simple and easy to explain to a board, but it is backward-looking. After a big trend year it can be wildly out of step with where the market now sits.
Some finance teams combine 1 and 2: the forward rate for the period, with a small buffer on top.
How Often To Revisit It
A budget rate that moves every week is not a benchmark. It is just a rate feed.
When The Market Drifts Away From It
This is the moment the budget rate earns its keep. Enter your budget rate in the calculator's "Compare against your budget rate" section and it will show you, in your reporting currency, exactly how much margin the drift represents, and how today's indicative forward compares.
From there you have three practical options:
A short conversation with a BLK.FX specialist will tell you which of those is realistic at today's rates, and what the executable rate actually looks like for your amount and date.
Key takeaway: A budget rate is not a prediction. It is the assumption your margin depends on, written down, reviewed on a schedule, and used to measure the market rather than the other way round.
Indicative guidance to support a conversation with BLK.FX, not financial advice or a quote.