Your iPhone is worth a certain amount of money today. It will be worth noticeably less on a Wednesday in September, and nothing about the phone itself will have changed. Same screen, same battery health, same faint scuff near the charging port. The only thing that will have happened is that Tim Cook walked onstage and said a number one higher than the one on your device.
That is the strange, slightly infuriating math of trading in an iPhone. Condition matters, but the calendar matters more, and most people find that out about two weeks too late.
The short version
- The event: Apple’s fall keynote is widely expected on Wednesday, September 9, 2026
- The tell: invitations usually land two weeks out, so around Tuesday, August 26
- The drop: trade-in values on the outgoing generation typically fall 15% to 20% within weeks of a keynote
- The precedent: the iPhone 16 shed roughly 20% of its trade-in value when the 17 arrived, worth up to $150 on some models
- The window: roughly two weeks before launch is the last comfortable moment to lock a quote
- The trap: an Apple Trade In quote is only good for 14 days, and the device has to arrive inside it
- The gap: Apple generally pays 15% to 30% less than third-party buyers
Why the number falls off a cliff on keynote day
Two things happen at once, and they push in the same direction.
The first is supply. A keynote is a starting pistol for millions of people who have been sitting on an aging phone waiting for a reason to upgrade. Within days, the resale market is flooded with the exact model you are trying to sell. Buyback companies price on inventory, and suddenly they have plenty.
The second is demand, or the lack of it. The moment a new generation exists, the previous one stops being “the current iPhone” and becomes “last year’s iPhone.” Nothing physical changed. The category it sits in did, and pricing follows the category.
Put those together and you get a value curve that looks less like a gentle slope and more like a step. It holds reasonably steady through August, then drops hard in the days around the announcement, then keeps sliding as the new models actually ship and the trade-in queue backs up.
The dates people are circling
Apple has not confirmed anything, and it is worth saying plainly that every date below is informed guesswork built on years of Apple sticking to a pattern. That pattern is unusually reliable, but it is still a pattern and not a promise.
| Date | What is expected | What it means for your payout |
|---|---|---|
| Tue, Aug 26 | Media invitations go out | Your last quiet week. Values are still at summer levels. |
| Mon, Aug 31 | Roughly two weeks before release | The practical sweet spot. Lock a quote here. |
| Wed, Sep 9 | The keynote itself | Repricing starts almost immediately. |
| Fri, Sep 11 to Sat, Sep 12 | Pre-orders open | Supply of your model spikes as upgraders commit. |
| Mon, Sep 14 onward | New models reach buyers | The floor. Values keep drifting for weeks. |
Worth noting what is actually expected to launch, because it changes how much pressure lands on the used market. Reporting points to an iPhone 18 Pro and 18 Pro Max in September, alongside Apple’s first foldable, and to the standard iPhone 18 possibly slipping to 2027. A Pro-only launch pushes fewer mainstream upgraders into the market at once, which softens the flood slightly. If you want the fuller picture on timing, we went through when the iPhone 18 is actually expected to land in more detail.
What the curve looks like
Where you actually get paid the most
The convenient option and the lucrative option are not the same option, and the gap is bigger than most people assume. Apple’s own program is the easiest thing in the world to use and consistently among the least generous.
| Route | Typical payout | How you get paid | The catch |
|---|---|---|---|
| Apple Trade In | Lowest of the three | Instant credit or gift card | Roughly 15% to 30% below third-party buyers |
| Carrier promo | Often the highest headline number | Bill credits spread over 24 to 36 months | Tied to plan tier and financing. Leave early and you forfeit the rest. |
| Third-party buyback | Usually the best cash figure | Real money, direct to you | You ship first and live without a phone for a few days |
The carrier route deserves a warning label. A headline of “up to $1,100 off” is real, but it is not cash, it is a discount delivered in slices across two or three years of billing. Upgrading to a pricier plan to unlock the better tier can quietly erase the entire benefit, and if you switch carriers before the credits finish, the remaining balance simply evaporates.
It is also worth checking your own quote rather than trusting a figure you read somewhere. Apple has moved these numbers more than once this year, and not always downward. We covered the moment Apple quietly raised its trade-in values, with some jumping almost 30%, which is exactly the kind of adjustment that makes any published table go stale within weeks.
The 14-day rule that catches people out
Read this before you click accept
An Apple Trade In estimate is valid for 14 days after you receive the new device. Your old phone has to physically arrive inside that window, and it has to match the condition you selected. Miss the window or overstate the condition and the offer is revised downward at inspection, usually by more than you expect. The quote is a conditional offer, not a locked price.
Condition grading is where most disputes happen. People describe a phone as “good” when a grader would call it “fair,” and the difference between those two words can be a hundred dollars. Be pessimistic about your own scratches. If you are wrong, the surprise is a pleasant one.
What to do before you hand it over
- Back up first, and verify the backup. Not “it says it backed up.” Actually check the date and size in iCloud settings.
- Do not erase anything until the new phone is in your hands. This is the single most common mistake. People wipe early, then spend a week without a working device.
- Turn off Find My and remove the device from your account. An active Activation Lock will stop the inspection cold and can void the quote entirely.
- Check the battery health figure. It feeds directly into condition grading, and knowing it stops you from accepting a lowball assessment.
- Get two or three quotes. Apple, one carrier, one buyback service. It takes ten minutes and routinely uncovers a three-figure spread.
- Photograph the phone before shipping. Timestamped evidence of condition is the only thing that helps if a grader disputes it.
The case for doing nothing
There is a real argument for ignoring all of this. If you miss the late-August window, the worst move is to panic and dump the phone in the middle of the drop, when values are at their ugliest and every buyback service knows it.
Launch weeks bring aggressive carrier promotions that are frequently built around trade-ins, and those promos are calculated on the discount rather than on your phone’s market value. In a heavy promo year, a mediocre trade-in attached to a generous offer can beat a good trade-in attached to nothing. Waiting and watching costs you very little once the value has already fallen.
The other reason to wait is simply that you might not want the phone that gets announced. This year’s keynote is expected to carry more than iPhones, including the camera-equipped AirPods that Apple accidentally revealed in its own software. Committing your old phone to a trade before you know what is actually on the table is a decent way to end up with a device you did not really want.
The one-line version
If you already know you are upgrading, get your quote locked in the last week of August and ship the moment your new phone arrives. If you are undecided, do nothing until the keynote, then judge the promotions rather than the trade-in tables. The costly move is the one in between: deciding in mid-September, after the value has gone and before the promotions have landed.
