How Forex Spreads Actually Work

What a Spread Actually Is

A foreign exchange (forex) spread is the difference between two simultaneous prices for the same currency pair: the bid (what buyers are willing to pay) and the ask (what sellers are asking for). The midpoint between bid and ask is the mid-market rate.

If EUR/USD is quoted at bid 1.0850 / ask 1.0852, then:

• If you want to buy euros, you pay the ask: 1.0852 dollars per euro.
• If you want to sell euros, you receive the bid: 1.0850 dollars per euro.
• The spread is 0.0002 — two pips wide.

That tiny gap is the structural margin built into the foreign exchange market. Even institutions trading at "no commission" pay it implicitly because they buy at the ask and have to sell back at the bid. Cross enough of those gaps in a year and it adds up to billions of dollars in industry profits.

What's a Pip?

A "pip" (price interest point or percentage in point) is the standard unit for measuring spread and price changes in forex. For most currency pairs, one pip is 0.0001 — the fourth decimal place. So a EUR/USD quote moving from 1.0850 to 1.0851 has moved one pip. For pairs involving the Japanese yen, where the typical quote has only two decimals, one pip is 0.01.

Many brokers and platforms now quote prices to a fifth decimal place ("fractional pips" or "pipettes"). A move from 1.08502 to 1.08509 is 0.7 of a pip — useful for high-frequency traders but irrelevant to anyone moving money for normal reasons.

To translate pips into dollars: at a EUR/USD price near 1.08, one pip on a $10,000 trade is worth about $0.93. On a $100,000 trade, one pip is about $9.30. Spreads of 1–2 pips on major pairs sound trivial but become meaningful at large notional sizes.

How Interbank Spreads Get So Tight

At the institutional (interbank) level, EUR/USD typically trades with a spread of 0.1 to 0.5 pips during active hours. The world's biggest banks and electronic market makers compete fiercely for flow from each other; razor-thin spreads are the cost of staying in the game. Their volume — trillions of dollars a day across the global forex market — makes even tiny per-trade margins enormously profitable.

The exact spread at any moment depends on three things: liquidity (deeper markets = tighter spreads), volatility (more volatility = wider spreads to cover risk), and time of day (the London/New York overlap has the tightest spreads in major pairs).

Why Retail Spreads Are So Much Wider

When the spread reaches you, it's much wider than what banks see. Here's what's happening: your bank, your broker, or your currency app accesses the interbank market at the tight institutional rate, then quotes you a marked-up rate that covers their costs, their profit margin, and the operational risk of serving small-volume customers.

The mathematically interesting thing is that everyone pays a spread — the question is just how big. Trading at 0.5 pips through an institutional account isn't free; it's just enormously cheaper than 400 pips at a retail bank.

Fixed vs Variable Spreads

Forex brokers offer two main spread structures:

Variable (Floating) Spreads

The spread changes throughout the day, widening during volatile periods and tightening during quiet ones. This reflects what's actually happening in the underlying market, so it tends to be cheaper on average — but you can occasionally get hit with a much wider spread during a news event or off-hours trading. Most ECN (Electronic Communication Network) accounts use variable spreads.

Fixed Spreads

The broker guarantees a constant spread regardless of market conditions. This is more predictable but typically more expensive on average, because the broker has to bake in a safety margin to absorb volatile periods. Some retail-friendly brokers use fixed spreads for beginner accounts.

For most retail traders, variable spreads from a reputable broker are the better choice — but read your broker's documentation carefully on how widely the spread can expand during major economic news releases.

Commission vs Spread: Two Ways to Pay the Same Toll

Some brokers charge a small fixed commission per trade and offer near-interbank spreads. Others charge no commission but build a wider spread into the prices they quote. Mathematically, these are two ways of charging the same total amount — but they're not always identical in practice.

For large traders, commission-plus-tight-spread accounts are usually cheaper because the commission scales with volume but the spread stays constant. For very small traders, no-commission-but-wider-spread accounts can be marginally cheaper because the absolute spread cost on tiny trades is lower than even a small minimum commission.

Why Spreads Matter Even If You're Not a Trader

If you're not a trader, you might think spreads don't apply to you — but they're embedded in every currency conversion you do. The "rate" your bank quotes you when buying euros for a vacation is essentially a one-sided ask price with a massive spread baked in. The "rate" you get back when converting unspent euros at the end of the trip is the bid side — also with a spread baked in. You're paying both ways without ever seeing the explicit pip math.

This is why understanding spreads matters even for ordinary travelers and remitters: the rate quoted to you is never the real price, and the gap is the entire economic point of forex providers' existence. The best you can do is shop for the provider with the narrowest spread. Our guide to saving on currency exchange compares the major options directly.

The One-Sentence Summary

Every currency has two prices, the gap between them is the spread, and the spread is the price of liquidity. Banks and institutions pay tiny spreads. Retail customers pay much larger ones. Knowing which spread bracket you're in is the first step to spending less on every currency conversion you do.