I've been running all three round-up features in parallel for the past three months — Plum, Chip, and Chase UK — using the same contactless spend from the same current account. Same Tesco runs, same coffee, same random Amazon lockers and council tax top-ups. Everything tapped on one card, mirrored across three apps.
The short answer: they're not equal. Not even close on some metrics. Here's exactly what happened.
How Round-Ups Work on Plum, Chip, and Chase UK
Round-up savings: an automatic feature that takes the difference between your purchase amount and the next whole pound, sweeping it into a separate pot or account each time you tap your card.
All three apps use the same base logic. You spend £3.60 on a coffee, 40p gets moved into savings. Spend £7.10 at the self-checkout, 90p goes. In theory, you don't notice it leaving — it's always less than a quid per transaction. In practice, those pennies stack.
The difference is what each app does with those pennies once they've moved, and whether you can amplify the saves without rewriting your entire budget to compensate.
Three Months of Real Contactless Spend: The Numbers
Over 91 contactless transactions across three months, the base round-up amount was identical across all three apps: £44.20. That's just the maths — 91 transactions averaging 49p each. No app can change the underlying arithmetic at the base level.
Monthly breakdown:
- Month 1: £14.80 — 31 transactions, quieter month, mostly Tesco and local stuff
- Month 2: £16.40 — 34 transactions, school uniform run, a couple of meals out
- Month 3: £13.00 — 26 transactions, genuinely tried to spend less; it kind of worked
If base round-ups are identical across all three apps, the competition has to be won elsewhere. And it is.
Multipliers: Where Plum Pulls Ahead of Chip and Chase
Plum's round-up multiplier is the best implementation of the three. You can set it to 2x, 3x, 5x, or 10x, and it applies cleanly to every contactless tap. Set it to 2x and that £44.20 becomes £88.40 saved over the same period — same spend, zero extra effort.
Chip also offers a multiplier, up to 10x. But honestly, the UI is a bit buried. It took me longer to find the setting than it should have, and I wasn't confident I'd activated it correctly until I checked the transaction log afterwards. Once it's running, fine. Getting there is faff.
Chase has no multiplier. None at all. What rounds up is what saves — £44.20 over three months and that's your lot. For an otherwise polished app, this feels like a deliberate gap rather than an oversight. A bit rubbish, frankly.
I ran both Plum and Chip on 2x multiplier for months two and three. The results:
- Plum (2x, months 2–3): £58.80 saved in those two months
- Chip (2x, months 2–3): £58.80 — identical base maths, as expected
- Chase (no multiplier, months 2–3): £29.40
The gap between Chase and the other two doubles the moment you enable even a modest multiplier. Annualise that and you're looking at roughly £350 saved via Plum or Chip versus around £175 via Chase, assuming similar spend patterns. That's a real difference.
Withdrawal Friction: Can You Actually Get Your Money Back Quickly?
Chase wins this round outright. Round-ups land in the Chase Saver account, which is instant access — transfer back to your current account and it appears immediately.
I was checking this while waiting for the kettle to boil one morning and the money was back before my tea was ready. Sorted. That kind of frictionless access matters when your savings and your spending account are effectively the same app.
Plum is acceptable. Withdrawals from a standard Plum pocket typically process within a day or two. I never waited more than 48 hours. Not as instant as Chase, but not genuinely annoying either.
Chip was the one that caught me out. One withdrawal sat pending for three days over a bank holiday weekend. That's not the end of the world — but if you're on a tight week and need those saved pennies back fast, discovering that delay mid-stress is the wrong moment. Worth knowing before you commit your round-up savings there.
Interest on the Saved Round-Up Pot
Chase earns interest on the Saver account automatically, which means your accumulated round-ups are quietly working while they sit there.
Chip's Instant Access account was paying around 3.84% AER during my test window — competitive, and worth factoring in. Plum's basic pocket pays less, though Plum has higher-rate options if you're prepared to lock funds away for a period.
On £44.20 over three months, the interest difference between apps is pennies. Genuinely. But run a 2x multiplier for a full year and stack around £350 in the pot — at 3.8% that's approximately £13 in interest you wouldn't otherwise have. Not loads. But it's £13 sitting in your savings rather than earning nothing in a current account.
The Config That Maximises Saves Without Triggering Overdrafts
The safest setup is Plum on 2x with a manual pause in the final week of the month, Chip on 1x near direct debit days, and Chase left running continuously. Each app handles overdraft risk differently — here's why those settings work.
The danger with multipliers is obvious once you think about it. A 10x week of heavy contactless spending could push £40+ out of your account right before a standing order leaves. I've covered this kind of cash-flow timing in detail in my post on salary day automation with Monzo, Starling, and Chase — the sequencing around bills week matters more than most people realise.
For the best results on tighter months:
- Plum on 2x: reliable and predictable. The pause function lets you halt round-ups without losing your multiplier setting — genuinely useful in the run-up to a heavy direct debit week
- Chip on 1x near bills day: Chip's AI does check your balance before pulling money, but I didn't trust a multiplier in the days either side of standing orders going out. Base rate only around bills week
- Chase always on: the base amounts are small enough that 1x round-ups never created a shortfall, and the instant-access nature means you can retrieve funds immediately if something unexpected comes up
If you're running Plum's AI savings feature alongside round-ups — which I covered in the Plum vs Chip AI savings comparison — dial the AI setting down to "safe" or "easy" on tight months rather than pausing everything. The AI and the round-up features pull from different triggers, so you can manage them independently without switching the whole thing off.
Which Round-Up App Is Best for UK Contactless Savers?
Plum is the best round-up savings app for most people running regular contactless spend through a UK current account. The multiplier is easy to configure, the pause function works properly, and the withdrawal speed is acceptable for most situations.
Chip is a close second. The multiplier is there, the interest rate is strong, and the AI balance-checking adds a layer of safety. But the buried settings and the occasional slow withdrawal mean it's not as clean to live with day-to-day.
Chase is the right choice if you want round-ups that feel completely invisible and carry zero friction. Instant access, interest on the pot, no configuration required. But if you want to actively push more money into savings via the round-up mechanism, Chase doesn't have the tools. The 1x cap with no multiplier option is a genuine gap — and the one thing I'd most like to see them add.
For someone spending around £600 a month on contactless and wanting to maximise what round-ups actually accumulate: Plum on 2x is the pick. You'll save roughly double what Chase accumulates over a year, withdrawal when you need it is manageable, and pausing before a tight week takes three taps.
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