Avios Balance Boost 500%: Buy Avios at 0.92p

The Avios Balance Boost 500% flash offer closes tonight, Friday 18th September - giving you one final chance to buy up to 300,000 Avios at just 0.92p each. British Airways extended the promotion by 48 hours, so if you have Avios-earning transactions from the last 30 days and you have been sitting on the fence, today is your last opportunity to act.

How the Avios Balance Boost 500% offer works

Avios Balance Boost launched in June 2023 as a way to buy additional Avios based on what you have already earned recently. Normally, you can boost up to 3x the Avios you earned in the last 30 days. This flash offer lifts that cap to 5x - meaning you can buy up to five times your recent Avios earnings, subject to the annual 300,000 Avios limit.

To use it, log into the BA Avios website and navigate to the 'buy Avios' page. You will see a list of eligible transactions from the past 30 days. You can select individual transactions, an entire category (such as 'Credit Cards'), or everything at once. You are then offered a 3x, 4x, or 5x boost multiplier.

Crucially, you must choose a 3x, 4x, or 5x boost to reach the lowest price of 0.92p per Avios. A 1x or 2x boost costs more per point - so do not select those if you want the best rate.

Flash offer ends tonight, Friday 18th September
Boost up to 5x your last 30 days of eligible Avios earnings (normally capped at 3x)
Price as low as 0.92p per Avios when boosting at 3x, 4x, or 5x
Annual cap of 300,000 Avios purchased via Balance Boost (across a calendar year)
To hit the 300,000 cap at 0.92p, you need at least 60,000 eligible Avios earned in the last 30 days (for a 5x boost)

What qualifies for Avios Balance Boost?

Not every Avios you hold counts towards what you can boost. Eligible transactions include Avios earned from BA shopping portal purchases, credit card spending, flights, and hotel and travel partners such as Uber. Transfers in from American Express Membership Rewards, HSBC Premier, and Heathrow Rewards also count.

What does NOT count: Avios transferred from airline partners such as Qatar Airways or Finnair, Nectar exchanges, Avios shared or gifted by another member, and Avios you have previously purchased. Each eligible transaction can only be boosted once.

The value maths: what 300,000 Avios at 0.92p actually means

At 0.92p per Avios, 300,000 Avios costs £2,760. Whether that represents good value depends entirely on how you plan to use them. Avios are typically worth between 1p and 1.5p each when redeemed for flights - sometimes significantly more in business or first class - so buying at 0.92p gives you a meaningful built-in margin on most redemptions. You can check current redemption costs using the BA Avios Flight Calculator to sense-check whether your target flight is priced attractively.

As a rough example: a return Business Class flight to New York with BA costs around 200,000 Avios plus taxes. If you value those Avios at 1.2p each, that is £2,400 of redemption value. Buying 200,000 Avios via Balance Boost at 0.92p costs £1,840 - a saving of around £560 versus paying cash for an equivalent seat. But the maths only stack up if you have the seat available. Use the BA Reward Avios Flight Finder to confirm availability before committing.

The HSBC Premier bonus stacks on top

If you hold HSBC Premier credit card points, there is an added reason to act quickly. Transferring those points to Avios by 30th September earns a 20% bonus on top of the standard transfer rate. Critically, the Avios you receive from that bonus are eligible for Balance Boost.

Here is how that stacks up: if you have 40,000 HSBC Premier points and transfer them today, you receive 24,000 Avios (including the 20% bonus). You can then immediately boost those 24,000 Avios by 5x, buying an additional 120,000 Avios at 0.92p each - costing £1,104 for 120,000 Avios. Similarly, any American Express Membership Rewards points you transfer to Avios today will also count as eligible transactions for the Balance Boost.

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How to get 0.92p per Avios: the exact combinations

The key rule is that you must stay within the 300,000 Avios annual cap to qualify for the 0.92p rate. If your boost takes you above that cap, the price jumps. Here are the three combinations that get you to the cap at the lowest cost:

5x boost: boost up to 60,000 eligible Avios to buy 300,000
4x boost: boost up to 75,000 eligible Avios to buy 300,000
3x boost: boost up to 100,000 eligible Avios to buy 300,000

If you have earned more than those amounts in the last 30 days, deselect transactions until you bring the total within the relevant threshold. If you leave everything selected and the total exceeds 300,000, you will be quoted a higher price per Avios - so take a moment to check before confirming.

Things to watch before buying

The single most important caveat: only buy Avios if you have a specific redemption in mind. Avios are not immune to devaluations, and buying a large balance speculatively carries real risk. The 0.92p price is genuinely low by historical standards, but it only represents value if you can redeem at a rate higher than that.

The offer ends tonight - there is no indication it will be extended again
The 300,000 Avios annual cap applies to all Balance Boost purchases across the calendar year, not just this transaction - if you boosted earlier in 2026 (for example during the recently closed 500% promo in September), your remaining allowance may be lower
Avios transferred from Qatar Airways, Finnair, or via Nectar cannot be boosted
1x and 2x boost options cost more per Avios - always select 3x or higher
The special 5x option returns to 3x after tonight

Frequently asked questions

How much does Avios Balance Boost cost per Avios?

When you boost at 3x, 4x, or 5x and stay within the 300,000 annual cap, the price is 0.92p per Avios (shown as 109 Avios per £1 in the interface). Boosting at 1x or 2x is more expensive per point.

What is the maximum I can buy through Avios Balance Boost?

The annual cap is 300,000 Avios at the special rate, measured across all Balance Boost purchases in a calendar year. If you have already used some of your allowance earlier in 2026, your remaining cap will be lower.

Can I boost Avios transferred from American Express?

Yes - Avios transferred into your BA account from American Express Membership Rewards count as eligible transactions for Balance Boost, as do transfers from HSBC Premier and Heathrow Rewards. Transfers from Qatar Airways, Finnair, and Nectar do not qualify.

When does the Avios Balance Boost flash offer end?

The flash offer - which includes the 5x multiplier - ends today, Friday 18th September 2026. After that, Balance Boost reverts to the standard 3x maximum.

The bottom line

At 0.92p per Avios with a 5x multiplier, this is one of the cheapest ways to buy Avios in bulk available to UK collectors. The catch, as always, is that you need a real redemption plan to make it worthwhile. If you already have a booking in mind - or you are close to the threshold for a specific award - this extended flash offer is worth using before it closes tonight. If you are unsure how many Avios your target flight costs, the Avios Value Calculator is a useful starting point before committing any cash.