What a transfer bonus is
A transfer bonus is a limited-time sweetener on an ordinary points transfer. Normally your bank points convert to a partner airline or hotel at a fixed ratio, usually 1:1. During a bonus, the partner receives extra: move your points to this airline before the end of the month and get 25% more miles on arrival, that sort of thing. The commonly seen range is 20-40%.
The bonus is specific on every axis. One issuer, one partner (occasionally a few), one window, sometimes a cap. It is not a property of your points; it is a coupon that exists for six weeks and then does not.
Both sides are paying for something real. The bank buys engagement with its card, the airline sells a batch of miles in bulk, and you collect a margin for routing your transfer through the promotion window. Everyone wins, in the narrow case where you were transferring anyway.
If transfers themselves are new territory, read Transfer Partners Explained first. Everything below assumes you know the most important rule of that article: transfers only move in one direction.
Who runs them
Amex, Citi, and Capital One run transfer bonuses often, in something close to a rotation. In a typical month at least one of them is boosting at least one partner, and the busy stretches see several promotions overlap. Chase is the outlier: bonuses from Ultimate Rewards exist but arrive rarely, and the roster mostly sits unboosted.
Why the difference? Partly positioning. Chase holds exclusive partners (United, Southwest, World of Hyatt among the major banks) and apparently feels less need to pay for your attention. Issuers whose partner rosters overlap heavily, all reaching Flying Blue or British Airways, compete for the same transfer, and a bonus is how one of them wins it.
The airlines have a hand in this too. A bonus dumps a wave of fresh miles into the partner program, which the airline sells to the bank for real money. So certain partners show up boosted again and again, while others almost never do. Watch the promotions for a year and the pattern stops looking random.
Where do you hear about them? The issuers announce bonuses inside their own sites and apps, and the points press republishes everything within hours. There is no master calendar worth paying for. If you hold a meaningful balance, a once-a-month glance at your issuer's transfer page covers it.
The math of a bonus
The arithmetic is the easy part. A bonus multiplies what lands on the other side:
| Bonus | You transfer | Partner receives |
|---|---|---|
| 20% | 100,000 points | 120,000 miles |
| 25% | 100,000 points | 125,000 miles |
| 30% | 100,000 points | 130,000 miles |
| 40% | 100,000 points | 140,000 miles |
The more useful way to read the table is backwards: as a discount on the award. With a 25% bonus, an award priced at 125,000 miles costs you only 100,000 bank points. The bonus just cut that redemption's price by a fifth. Same trip, fewer points, and the leftover stays flexible in your bank account where it belongs.
That reframing matters because the award price is the real number. Miles received is vanity; points spent is the bill.
One wrinkle worth knowing: some promotions cap how many bonus miles a single account can earn, and every program transfers in fixed increments, so the clean arithmetic above picks up a little rounding in practice. Read the promotion's fine print before you move anything. It is rarely longer than a page.
When does a bonus actually justify transferring?
One situation, mainly: you already wanted the redemption. The trip exists, the award space is confirmed bookable, and the partner was already the right one. Then a bonus is a pure discount, the closest thing to free value this hobby offers, and you should take it without overthinking.
A weaker but defensible case: the bonus tips a marginal redemption into a good one. An award that priced just above your comfort level at 1:1 might clear the bar at 1:1.3. Fine, as long as the trip is real and the space is there.
The case that does not hold up is transferring because the bonus exists. No trip, no searched availability, just a percentage and a countdown timer. At that point the promotion is doing exactly what it was designed to do, which brings us to the trap.
A five-minute bonus checklist
Before any transfer during a promotion, four questions, asked in order:
- Is the award real? Search the actual flight or room, on your actual dates, and see it bookable at a known price. A screenshot in a blog post from March is not availability.
- Would I make this transfer at 1:1? If the answer is no, stop here. The bonus is sweetening a deal you already declined.
- How much am I moving? Transfer what the award costs, rounded to the program's increments, and nothing more. Extra percentage on points you did not need to move is not a bonus. It is bait that followed you home.
- What happens to the remainder? Whatever stays in the bank currency keeps every option it had. Whatever crosses over inherits the partner's expiration rules and pricing whims.
Five minutes, honestly answered, prevents nearly every transfer-bonus regret on record. The promotions are designed for people who skip question one.
The stranding trap
Remember what a transfer bonus is from the bank's perspective: a discount on getting you to give up flexibility. Bank points can become a dozen different currencies, or cash, or a statement credit. Airline miles can become exactly one thing: awards in that program, at whatever prices that program decides to charge this year.
So the failure mode writes itself. A 30% bonus turns 100,000 flexible points into 130,000 miles in a program you had no plans for. The award you vaguely imagined never materializes (availability is its own battle). The program devalues, or the miles sit while dynamic pricing drifts upward around them. Your boosted balance is now worth less than the unboosted one you traded away. A bigger number in a weaker currency is a pay cut with confetti.
Expiration sharpens the trap. Bank points generally live as long as your card account does, while plenty of airline programs expire miles after a stretch of inactivity. The bonus moved your balance from a currency with no clock onto one with a timer.
The test is one question: would this transfer make sense at 1:1? A bonus should improve a good decision, not manufacture one.
Bonus-chasing as a strategy
There is a sophisticated version of all this. Some points people deliberately hold their balances in bank currencies, refuse to transfer at 1:1 ever, and wait for bonuses to the partners they actually use. When the right promotion hits, they move exactly what the planned award costs and not a point more.
It works. It is also work. The strategy demands flexible travel dates, attention to a promotion calendar across three or four issuers, and the discipline to let a mediocre bonus pass (the calendar does not care that you are ready to book). For people who enjoy the meta-game, it compounds nicely with the sweet spot hunting that usually motivates it. For everyone else it is one more reason the balance never gets used at all.
There is also a portfolio version: holding cards across multiple issuers specifically so that any given partner is reachable from whichever currency gets boosted next. Clever. Also a lot of annual fees to carry while you wait for a promotion to feel like destiny.
The cash alternative
Every bonus decision quietly assumes the only exits are transfer now or wait. There is a third: sell the balance while it is still flexible. Bank currencies are exactly what brokers pay the strongest rates for, because the flexibility you would give up in a transfer is the thing being bought.
At iBuyPoints that means a free quote on your credit card points, a verification call with a specialist, and PayPal payment that typically lands within 1 business day. No promotion window, no countdown timer, no partner roster to study.
A transfer bonus is a discount on a commitment. Make sure you wanted the commitment, not just the discount.