What happens after you press Buy? UK trade settlement explained

Maya presses Buy at 10:13 on Tuesday. By 10:14 her platform shows a holding. Has she bought the share? In this example, yes: the order has been executed. But that is not the end of the transaction. The share and the cash still have to move between the parties through a process called settlement.

The useful distinction is between three moments: you give an instruction; a trade is made; the trade is settled. They may appear almost simultaneous on a screen, but they are not the same event. Knowing which moment you are looking at helps explain why an order can fail to fill, why the price on a contract note differs from an earlier quote, and why sale proceeds may show in your account before you can withdraw them.

Pressing Buy is an instruction, not a purchase

When Maya taps Buy, she sends an order through her platform. That order describes what she wants to buy and, depending on its type, the quantity and any price limit she sets. The platform handles the order under its dealing and execution arrangements. The button itself does not guarantee that there is a seller at an acceptable price.

Suppose Maya asks to buy 100 ordinary shares in a fictional UK company. If her order executes in full at £8.00 a share at 10:14, she has a trade: 100 shares bought for £800 before any separately charged costs. The price that matters is the actual fill, not the indicative price she saw while deciding. In a moving market those can differ. A limit order can constrain the price she is willing to pay, but may not execute if that price is unavailable. A market order gives priority to getting a trade, not to guaranteeing the screen price.

Sometimes an order fills only in part. If only 60 shares are available on the order’s terms, she may end up with a 60-share fill and an unfilled remainder, depending on the order and venue rules. A rejected or expired order creates no purchase. This is why Maya checks the executed quantity and price rather than treating a Buy button or an “order received” message as proof that she owns all 100 shares.

The contract note is the transaction record

After execution, the platform provides a contract note or trade confirmation. Maya uses it to check the trade date, security, number of shares, fill price and any separately charged commission or tax. If an order filled in pieces, the record may show more than one fill or an average price. Those details become essential when she later calculates what she actually gained or lost.

The contract note answers “what trade did I make?” It does not itself mean that the back-office transfer has finished. That later completion is settlement.

What happens between execution and settlement?

For this fictional UK share trade, Maya’s broker and the other side of the trade have to deliver what each owes. The buyer’s side provides cash; the seller’s side provides the securities. UK market infrastructure includes CREST, operated by Euroclear UK & International, which supports delivery versus payment: the securities transfer and payment are matched so one side does not simply hand over its asset while waiting indefinitely for the other.

Maya does not have to operate CREST herself. Her broker or custodian handles that plumbing. What she should understand is that a trade can be binding before the securities and cash have completed their journey. The account interface may already show the shares as a holding, or reduce her buying power, while the settlement work continues behind the scenes.

“T” means trade date, not the day Maya first thought about buying or the day her order was submitted if it did not execute immediately. Under the UK’s current standard for most transferable securities traded on UK venues, settlement is due no later than two business days after the trade: T+2. Market holidays, as well as weekends, must be counted correctly. A fund unit, overseas security or a particular provider’s process may follow different arrangements, so Maya checks the instrument and market rather than applying this example to every investment.

Why can money appear but not be withdrawable?

Now imagine Maya sells those shares on Thursday. Her platform may show the sale proceeds as a balance straight away. It may even let her use that amount for another investment. That does not necessarily mean settled cash is ready to leave the platform for her bank account.

Hargreaves Lansdown, for example, says proceeds from sold investments must settle before customers can withdraw them. Its published page gives an average of two working days for share trades and notes different timing for funds. That is useful evidence of the distinction, not a rule about every broker. Providers may use different labels such as “available to invest”, “cash balance” and “available to withdraw”, and may apply security or bank-transfer checks as well.

So if Maya sees £800 after a sale, she asks a more precise question than “is the money there?” She asks whether the balance is an executed sale amount, settled cash, or cash the platform will actually let her withdraw today. Those are operational states, not three different profits. The terms and the date shown in her own account are the ones she needs to check.

What if settlement does not happen on the expected day?

The timeline shows the normal expected cycle, not a guarantee that every trade will complete without a problem. An order may never execute, may fill only partly, or may execute but later settle late because one side cannot deliver what is due on time. These are different failures with different remedies. Maya should use the contract note and transaction status to identify which stage has the problem, then ask her broker to explain any discrepancy or delay.

It would be misleading to imply that the shares are always inaccessible until settlement or that a broker can never let her trade before it. Account displays and buying-power policies vary. The safe general rule is narrower: do not treat an executed trade, a displayed holding and settled, withdrawable cash as interchangeable.

A changing rule worth dating

As checked on 25 September 2026, the UK’s standard settlement period for most relevant UK-venue securities trades is T+2. The FCA and Treasury say the market is moving to T+1 on 11 October 2027. That would shorten the standard to one business day after trade date for trades in scope. The Treasury policy note discusses a draft statutory instrument rather than a completed change, so the final law and implementation need checking again before that date. The proposed change also does not make every fund or broker withdrawal process identical.

For a trade Maya makes now, the practical check is the same regardless of the future timetable: find the actual fill and charges on the contract note, identify the expected settlement date, and read the platform’s own meaning of “available”. A balance is useful only when she knows what stage of the transaction it represents.