Apple’s own description of how a trade-in estimate becomes real credit is a single sentence: it depends on the device, model, manufacturer and condition, and answering a few questions accurately is what gets a customer the full amount of that estimate once Apple receives the device and verifies its condition. With iPhone 18 Pro pre-orders open today, that questionnaire is the only thing standing between an estimate and a confirmed credit.
Apple does not publish a grading scale to check an answer against. The honesty of the answer is doing the work a scale would otherwise do, and Apple says so in its own words.
Key facts
| Item | What Apple has published |
|---|---|
| How the estimate is produced | A few questions about device, model, manufacturer and condition, answered by the customer |
| What Apple says happens if the answers are accurate | The customer will most likely receive the full amount of the estimated refund |
| What Apple checks the answers against | Apple’s own inspection once the device is received, not a published scale |
| Apple’s US trade-in range | $175 to $885 in credit for an iPhone 13 or later |
| Apple’s UK trade-in figure | Up to £455 for an iPhone 16 Pro or later |
The word doing the work is accurately
Apple’s own wording is conditional rather than guaranteed: answer accurately, and the customer will “most likely” receive the full estimate. Apple does not promise the full amount regardless of the answers; it promises it as the likely outcome of an accurate description matched against what Apple finds when the device arrives. That gap between the estimate given at checkout and the credit confirmed later is the entire reason the questions exist.
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What Apple says can lower the number
Every trade-in figure Apple’s range implies is a maximum for a device in good condition, and Apple is explicit that specific problems bring the number down, sometimes far down.
| Condition Apple names | Effect on the credit |
|---|---|
| Cracked screen | Lowers the credit below the estimate |
| Swollen battery | Lowers the credit below the estimate |
| Failed diagnostic | Lowers the credit below the estimate, sometimes far below |
None of the three requires guesswork to describe honestly. A screen either has a crack or it does not, and a device either powers on and passes Apple’s check or it does not. The questionnaire is built around facts a customer already knows, not judgment calls Apple leaves ambiguous, and answering from memory rather than checking the device first is the most common way an estimate and the eventual credit end up apart.
Why the September 9 cut raises the stakes on accuracy
Values recorded for individual models fell after September 9, in some cases by as much as $120. That reduction did not change what the questions ask, but it did shrink the ceiling an inaccurate answer subtracts from. A device described more favourably than its actual condition risked a smaller correction a week ago than it does now, simply because the top of the range it is measured against moved down. The mechanics Apple describes have not changed; the number they are applied to has.
This applies whether the trade-in credit goes toward iPhone 18 Pro or any other current model, and it applies the same way regardless of which storage tier or camera configuration the new phone uses.
What has not been confirmed
Apple has not published a formal condition grading scale, a list of every question the checkout asks, or a table showing how much a specific fault subtracts from a specific model’s estimate. The estimator page Apple once used for a standalone lookup returns an error rather than a form, so the questions are only encountered inside the actual checkout flow. Apple has not stated how long the verification step takes once a device is received.
Pre-orders are open now, ahead of delivery on Friday, September 18. Anyone choosing Apple’s own trade-in route this week is answering those questions today, with the credit confirmed only once the old device is actually received and its condition checked against what was described at checkout.
