When Apple launches a new Pro iPhone, the headline number is always the retail price. Yet that is not the number an existing iPhone owner should use when deciding whether an upgrade is affordable. The real cost is the difference between the new phone and the value of the phone already in your hand.
The upgrade-cost formula most people ignore
NEW IPHONE PRICE – RESALE VALUE OF YOUR CURRENT IPHONE = NET UPGRADE COST
That sounds obvious, but it changes the way launch decisions should be made. An expensive new phone can be a relatively modest upgrade if your current handset still carries strong resale value. A cheaper phone can still be a poor financial decision if the old device is left unused in a drawer until its value falls further.
Why the iPhone 18 Pro makes the timing question relevant
Apple has not confirmed the iPhone 18 Pro, but current reporting expects the Pro models in September 2026. Rumours include a new A20 chip, design changes around Face ID and the Dynamic Island, camera improvements and a next-generation modem. Macworld’s iPhone 18 Pro tracker summarises the current reporting while making clear that details remain unconfirmed until Apple’s event.
For iPhone 16 owners, that makes this an interesting point in the cycle. The phone is still new enough to retain meaningful resale value, but it is about to sit two generations behind the newest Pro model if Apple follows the expected schedule.
Your old phone is effectively part of your upgrade budget
At the time of writing, SellMyPhone’s 256GB iPhone 16 comparison page was showing a recommended recycler offer in the £400s. That value is not fixed and will move with condition, storage, network status and recycler demand, but it illustrates how much the existing phone can matter to the final bill.
Before deciding whether the iPhone 18 Pro is “too expensive”, check what you would receive if you sell my iPhone 16 today. Subtracting that from the eventual launch price gives you the number that actually matters.
The trap: waiting for the new phone and forgetting the old one
Many people order a new handset, transfer their data and put the previous phone aside “for later”. Weeks turn into months, the market fills with more used devices and the old phone quietly loses value.
There are perfectly good reasons to keep a spare phone, of course. If it is your emergency backup, the value to you may be greater than its resale price. But if the plan is definitely to sell, delay has little upside once the new handset is already in use.
Do the maths before you fall in love with the launch
A good upgrade decision should answer three questions:
- Which new features will I genuinely use?
- What is my current phone worth today?
- What is the net cost after I sell the old device?
That keeps the decision grounded. A new camera system might be worth paying for if photography is important to you. A modest processor gain may not be.
Once the new iPhone is official, SellMyPhone.co.uk can be used to compare live offers from UK recyclers rather than relying on a single trade-in quote. The important thing is to treat the current phone as an asset in the upgrade calculation, not as something to think about after the money has already been spent.
