Spot vs forward contracts: what's the difference?

When you exchange currency for your business, you will usually be offered one of two basic types of deal: a spot contract or a forward contract. They sound technical, but the difference is simple — it comes down to when you exchange the money and when you fix the rate. Understanding the two, and when each makes sense, is one of the most useful things you can know as an importer, exporter or anyone paying overseas. This guide explains both in plain English, with examples.

What a spot contract is

A spot contract is the straightforward one: you buy currency at today's rate for near-immediate settlement — typically within a day or two. You see the rate, you agree it, the money changes hands. There is no waiting and nothing to fix for the future.

Spot is best when you need to pay now and you are comfortable with the current rate. It is quick, simple, and involves no ongoing commitment. The trade-off is that it only covers the payment in front of you — it does nothing to protect you against where rates might go next week or next month.

What a forward contract is

A forward contract fixes today's rate for a payment you will make later — often anywhere from a few weeks to a year or more ahead. You lock in the rate now, but the money moves on (or before) an agreed future date. Nothing about the market in the meantime changes what you will pay, because the rate is already set.

The forward rate is not identical to the spot rate; it is adjusted slightly for the difference in interest rates between the two currencies over the period. That adjustment can work marginally for or against you, and a good dealer will explain it before you commit. Providers usually offer a fixed version (one set date) and a flexible "window" version (draw the currency any time up to the date), which helps if your payment timing might shift.

The key difference in one line

A spot contract is about paying now at today's rate. A forward contract is about fixing today's rate for a payment made later. Spot deals with the present; forward manages the future. Both are standard tools that our foreign exchange partners offer, and many businesses use both at different times.

When to use each

The right choice depends on your timing and how much certainty you need. As a rough guide:

• Use a spot contract when the payment is due now or very soon, the amount is modest, or you are simply happy with the rate on offer and do not want a commitment.
• Use a forward contract when you have a known payment coming up, the FX cost is a meaningful part of the deal, and you want to protect your margin from a swing in the rate before you pay.

It is worth remembering that a forward contract is about certainty, not about beating the market. If rates happen to move in your favour, a spot deal on the day would have done better — but you would have carried the risk of them moving against you instead. Fixing the rate removes that guesswork.

Examples for importers and exporters

A couple of simple, illustrative examples show how the two play out. (The figures are for illustration only — real rates and amounts vary.)

An importer

Suppose you import goods and have agreed to pay a European supplier in euros in three months. If a weaker pound in the meantime makes those euros more expensive, your margin shrinks — pure transaction risk. A forward contract lets you fix the rate now, so you know exactly what the stock will cost regardless of what the market does. That certainty protects the margin you priced the goods on. If you instead needed to pay the supplier immediately, a spot contract would be the natural fit.

An exporter

Now suppose you sell overseas and will be paid in dollars in a couple of months. You are exposed the other way: if the pound strengthens, those dollars convert to fewer pounds than you expected. A forward contract can fix the rate you will receive, protecting the value of the sale. Alternatively, if you regularly earn and spend in the same currency, a currency account can let you hold the dollars and pay dollar costs from them — converting only when it suits you, rather than at whatever rate applies on the day.

You do not have to choose just one

Spot and forward are not rivals — they solve different problems, and most businesses that trade internationally use a blend. You might settle small, immediate payments on spot while fixing larger, known future payments on forward contracts, and lean on a currency account for the flows that go both ways. A dedicated dealer can help you match the tool to each situation.

In short: spot is for now, forward is for later with certainty. Knowing the difference means you can make each payment deliberately rather than taking whatever is put in front of you. If you would like help deciding what fits your business, get in touch and we will introduce the right FX partner.