GBP/USD Interest Rate Differential
The current policy-rate gap between British Pound and US Dollar, and which side of GBP/USD earns the carry. Updated daily · as of September 18, 2026.
US Dollar carries the higher policy rate, so going short GBP/USD earns positive carry (swap); the opposite side pays it.
This is the current gap. The market trades the expected differential, which can move GBP/USD before any rate change lands.
Go deeper
All interest rate differentials
The full matrix and carry calculator for every major.
The Carry Trade
How the differential becomes a daily swap, and why it crashes.
British Pound rate decision
The schedule and results that move the GBP leg.
US Dollar rate decision
The schedule and results that move the USD leg.
British Pound fundamentals
What drives the GBP leg: policy, growth, inflation and positioning.
US Dollar fundamentals
What drives the USD leg: policy, growth, inflation and positioning.
GBP/USD carry — frequently asked
What is the GBP/USD interest rate differential?
The GBP/USD interest rate differential is currently -0.25 pp — the British Pound policy rate (3.75%) minus the US Dollar policy rate (4.00%). US Dollar carries the higher rate, so it tends to attract demand.
Does long GBP/USD earn or pay swap (carry)?
Going short GBP/USD earns positive carry, paid as the daily swap (rollover), because that side holds the higher-yielding currency (US Dollar). The opposite side pays the swap. Carry is simply the interest-rate differential turned into a daily cash flow.
Why does the expected GBP/USD differential matter more than today's?
Markets price the future, not the present. GBP/USD can move on a widening or narrowing expected differential before any actual rate change, as new data and central-bank guidance shift the expected paths of the British Pound and US Dollar central banks. Today's gap is largely already priced in.
Does the higher-yielding side of GBP/USD always go up?
No. The rate differential is gravity, not a guarantee. It dominates in calm, risk-on conditions, but in a risk-off shock capital rushes to safe havens regardless of yield, and crowded carry positions can unwind violently.