A settlement period is the length of time between the moment a transaction is agreed and the moment it is settled, when the buyer pays and the seller delivers. In securities settlement it is usually expressed as a number of business days after the trade date, written in shorthand such as T+1 or T+2. The same idea applies to foreign exchange, where spot trades in most currency pairs settle two business days after the trade, and to many payment and card arrangements, where funds reach the recipient a set time after the payment is made.
The settlement period should not be confused with a settlement window. The settlement period is a span of days between trade and settlement; a settlement window is a slot of time on the settlement day during which a system actually performs settlement. A trade with a T+1 settlement period, for example, might settle in one of several windows on the following business day.
Settlement periods in plain terms
When someone agrees to buy a used car, the handshake usually comes before the money and the keys change hands. There may be a day or two in between while the buyer arranges payment and the seller prepares the paperwork. That gap is the settlement period. During it, the deal is agreed but not done, and either side might still let the other down.
Financial markets formalise this gap. Each market has a standard number of days within which trades must be completed, so everyone knows when the cash and the shares are due. Shorter gaps mean less time for something to go wrong, but they also leave less time to fix mistakes and arrange money, which is why changing the standard is a big project.
Common settlement periods
| Market | Typical settlement period |
|---|---|
| US equities and corporate bonds | T+1 since May 2024 |
| EU and UK equities | T+2, with a move to T+1 planned for October 2027 |
| US Treasury securities | Usually T+1 |
| Spot FX, most currency pairs | T+2 |
| Spot FX, US dollar against Canadian dollar | T+1 |
| Many money market and repo trades | Same day (T+0) |
Periods are counted in business days, so weekends and public holidays in the relevant markets are skipped. Parties can sometimes agree a different period for a particular trade, but the market standard applies unless they do.
Why settlement periods are shrinking
Historically, settlement periods were long because paper certificates and cheques had to be physically moved and checked. In the United States, equity trades once settled five business days after the trade. Electronic book-entry holdings at a central securities depository (CSD) and automated matching made shorter periods possible. US equities moved to T+3 in 1995, T+2 in 2017 and T+1 in 2024, and the European Union adopted T+2 in 2014.
The main reason for shortening the period is risk. Between trade and settlement, each side is exposed to the other: if one party fails, the other may have to replace the trade at a worse price. This replacement-cost exposure, a form of counterparty risk, grows with time and with market volatility. A central counterparty (CCP) covers it by collecting initial margin, and a shorter period means less margin is needed. When the period ends, the trade normally settles on a delivery versus payment basis, so neither side hands over its leg without receiving the other.
Trade-offs of shorter periods
- Tighter operations. Allocation, confirmation and instruction of trades must happen much faster, often on trade date, which pushes firms to automate.
- Funding and foreign exchange. Overseas investors buying US shares under T+1 may need dollars sooner than a standard T+2 spot FX trade would deliver them, so they turn to faster FX settlement or pre-funding.
- Securities lending. Lenders have less time to recall loaned securities before a sale settles.
- Settlement fails. Firms that cannot keep up risk more failed trades, which may bring cash penalties under rules such as the EU's settlement discipline regime.
Some argue for going further, to same-day or real-time settlement, sometimes using tokenised assets and cash on shared ledgers. Others point out that netting a day's trades saves a great deal of liquidity and that instant settlement would require every trade to be fully funded in advance.
Settlement periods in payments and cards
In payments, the term also describes the time between a payment being made and the recipient's bank receiving final settlement. Card acquirers typically pay merchants one or more business days after a card transaction, depending on the acquirer, the card scheme and the merchant's risk profile; see authorization and settlement. In deferred net settlement systems, the period runs from a payment entering the system to the next settlement cycle, and throughout that time participants carry settlement risk. When the period ends, each party must meet its settlement obligation in full.