Your O2 Bill Explained: Airtime Plan, Device Plan and Every Line Item

Read your bill section by section before you call. We explain what each line means; only O2 can change what is on it.

Independent · Not affiliated with O2 · You are never charged a fee by us

We help you prepare for your network call; we do not provide network support ourselves.

How your bill is laid out

Most O2 bills follow the same order each month: summary total, airtime plan, device plan if you have one, out-of-allowance charges, bolt-ons, one-off charges, discounts, VAT. Reading it in order answers most questions on its own.

The summary

The summary shows the total due and the date it leaves your account. It is the sum of every section below, so a change here almost always starts in one of those sections.

Airtime plan

Your airtime plan covers calls, texts and the data allowance you chose, priced per month. O2 typically reviews these prices each April.

If this line jumped without you changing anything, check the date against O2's pricing cycle.

Device plan: a separate credit agreement

If you took a handset through O2, the device cost typically sits on its own line as a separate credit agreement, not part of your airtime plan. On most plans the two run on different terms, and paying off one early does not clear the other.

Outside your allowance

Calls, texts or data used beyond your monthly allowance appear as a separate charge, at O2's published out-of-bundle rate. These rates rise each 1 April.

If this line is larger than expected, your usage may be running ahead of your allowance most months.

Bolt-ons

A bolt-on is usually an add-on you chose, such as extra data or roaming, billed separately from your core plan. On most bills each bolt-on has its own name and price. If you see one you do not recognise, note its exact name before you call.

One-off charges

These are single, non-recurring items: a replacement SIM, a late-payment charge, or a one-time call to a premium number. They will not repeat unless the same event happens again.

Discounts

Any ongoing discount, such as a loyalty or bundle reduction, is shown as a negative line that reduces your total. If a discount has a known end date, check for it, since the bill will not warn you when it stops.

VAT

UK mobile bills include VAT at the standard rate. It may show as one line, or be built into the price of each item, depending on your plan. The VAT figure should move in step with the rest of the bill.

Payment date

This is the date O2 collects the total shown, usually by direct debit. It usually stays the same each month unless you changed your billing date when you joined or switched plans.

Spend cap

A spend cap is usually a limit you set on charges outside your allowance, so on most plans you cannot be billed past it without agreeing first. If your bill often sits right at the cap, your out-of-allowance use is likely higher than your plan covers — worth raising when you call.

Glossary: 15 terms from your bill

Airtime plan

The part of your contract covering calls, texts and data, billed monthly and separate from any device plan.

Device plan

A separate credit agreement for a handset, running on its own term and end date.

Out-of-allowance

Usage beyond your monthly calls, texts or data limit, charged at O2's published rate.

Bolt-on

An add-on you chose, such as extra data or roaming, billed as its own line.

One-off charge

A single, non-recurring item such as a replacement SIM or a premium-rate call.

Spend cap

A limit you set on out-of-allowance charges, so billing cannot pass it without your agreement.

Pounds-and-pence pricing

O2's pricing structure, where any annual increase is a fixed cash amount rather than tied to inflation.

PAC

A code you request from O2 to keep your number when moving to another network.

STAC

A code you request from O2 to move to pay-as-you-go while keeping your number.

Fair use limit

The point at which roaming or data use abroad may trigger extra charges.

Direct debit collection date

The fixed date each month O2 takes payment for your bill.

Credit agreement

The separate finance contract behind a device plan, apart from your airtime plan.

Allowance

The calls, texts and data included in your plan price before out-of-allowance charges apply.

Billing cycle

The recurring monthly period a bill covers, from one payment date to the next.

Notice period

The time you must give O2 before a contract change or cancellation takes effect.

Read your bill in five minutes: a printable checklist

• Find the summary total and compare it with last month's bill.
• Check whether the airtime line changed and whether this is April.
• Look for a separate device plan line if you have a handset on finance.
• Check the out-of-allowance line against your usual usage.
• Note the exact name of any bolt-on you do not recognise.
• Check for one-off charges and whether you expect them.
• Confirm any discount is still showing with time left.
• Check the payment date matches when you expect it.
• Check whether you are close to, or have reached, your spend cap.
• Write down the one line you most want explained before you call.

Related help

• Get help with a specific bill problem
• Understand roaming charges
• See how the annual price rise works
• See how a call works
• Check our sources