Depreciation and Residual Value
Depreciation is the value a phone loses while you own it; residual value is what remains when you sell or trade it in. This section helps you estimate both without pretending that a future price can be guaranteed.

Depreciation is the value a phone loses while you own it; residual value is what remains when you sell or trade it in. This section helps you estimate both without pretending that a future price can be guaranteed.
Use the right guide
| Task | Guide |
|---|---|
| Understand the mechanism | How Phone Depreciation Works |
| Identify resilient characteristics | Phones That Hold Their Value Best |
| Spot rapid-loss risks | Phones That Lose Value Fastest |
| Estimate a current phone | How to Calculate Resale Value |
Depreciation is not a fixed percentage
Brand, storage, support life, condition, repair history, demand and the timing of a replacement launch can all matter. A percentage copied from another model is a scenario, not evidence.
Use a conservative net figure
For ownership calculations, deduct selling fees, postage, packaging and likely condition deductions. A high asking price that has not resulted in a sale is not residual value.
Guides connected to Depreciation and Residual Value
Evidence and official references: Depreciation and Residual Value
Using the Depreciation and Residual Value guides
Treat this area as a handover process: value the handset, choose a route, document condition, protect accounts and data, confirm payment or collection, and keep enough evidence afterwards.
- How Phone Depreciation Works — Use this guide when that narrower question is the one blocking the decision.
- Phones That Hold Their Value Best — Use this guide when that narrower question is the one blocking the decision.
- Phones That Lose Value Fastest — Use this guide when that narrower question is the one blocking the decision.
Guides in this section

Phones That Hold Their Value Best
No brand or model can be promised to hold value best in the future. The useful question is which characteristics make a phone easi…
16 August 2026
Phones That Lose Value Fastest
Rapid depreciation is usually caused by a weak remaining-usefulness story or an inflated starting price, not by one simple brand r…
16 August 2026
How Phone Depreciation Works
A phone loses value because buyers pay for its remaining usefulness and certainty, not because a fixed percentage disappears each …
26 July 2026