Plum vs Moneybox: Saving and Investing Compared

The Plum vs Moneybox choice comes down to how you want your money moved: Plum studies your spending and quietly sets aside amounts it reckons you will not miss, while Moneybox rounds up your card purchases to the nearest pound and sweeps the change into savings or investments. Both have grown from simple savers into fuller money apps with ISAs, pensions and interest-paying accounts, but they suit different savers. I have used both the way a normal person would, and this is where each one actually earns its place.

If you want the wider field rather than a straight head-to-head, our pick of the best round-up and auto-savings apps in the UK sets these two against Chip and the rest.

How each app saves for you

Plum leans on automation. You connect your current account through Open Banking, and every few days its algorithm calculates a sum it thinks you can spare and moves it aside for you. You can layer round-ups, fixed recurring deposits and one-off top-ups on top of that, but the automatic set-aside is the headline trick.

Moneybox starts from round-ups. Link a card, and each time you spend it rounds the purchase up to the next whole pound and puts the difference to one side, ready to be saved or invested. You can add weekly deposits and payday top-ups too, but the round-up is the habit it is built around.

In practice, Plum feels better if you want money moved without thinking about it at all. Moneybox feels better if you like seeing small, visible sums stack up from everyday spending, and if you want a clearer nudge tied to each purchase.

Where the two apps really differ: investing

This is the line that decides the Plum vs Moneybox question for a lot of people.

Moneybox offers a broader investing range. Alongside its saving accounts it gives you tracker funds, a set of managed starter portfolios, exchange-traded funds and a selection of US stocks, plus the full ISA family: a Cash ISA, a Stocks and Shares ISA, a Lifetime ISA and a Junior ISA. If you want a first home deposit boosted by the Lifetime ISA government bonus, or you want to hold individual shares, Moneybox has the wider toolkit.

Plum’s investing arm is narrower. It puts you into a range of mutual funds rather than letting you buy individual shares or a large menu of ETFs, and it offers a Stocks and Shares ISA and a pension, but not a Lifetime ISA. What Plum does well is keep investing simple for someone who does not want to pick anything themselves.

So if investment choice matters, Moneybox is usually the stronger platform. If you mainly want automated saving with a light-touch investing option bolted on, Plum is enough.

The fees that change the maths

Neither app is free once you go beyond the basics, so do the sum yourself rather than trusting either app’s marketing.

Both charge a monthly subscription for their paid features, and both add a percentage platform or product fee on invested money that is charged as a proportion of your balance each year. That percentage fee is the one that quietly grows as your pot grows, so on a larger balance it can outweigh the flat monthly cost. Moneybox waives its subscription for an introductory period; Plum runs tiered plans that unlock higher interest boosts and more features as you move up.

The practical takeaway: on small balances the monthly subscription dominates, and on larger balances the percentage fee does. Treat any figure you read anywhere, including here, as a snapshot, because both apps change their pricing. Check the live terms on each app’s own pages before you commit.

Savings interest and ISAs

Both apps put idle cash into interest-paying accounts rather than letting it sit still, and both offer a Cash ISA so your interest is sheltered from tax within your annual £20,000 ISA allowance.

Rates move constantly and usually carry a 12-month introductory bonus that drops to a lower ongoing rate, so the headline figure advertised is rarely the rate you keep for long. The advice is the same for either app: find the live rate on the provider’s own savings pages, check whether it is a bonus or the standing rate, and compare it against a plain easy-access account elsewhere. One useful Moneybox detail is that its Cash ISA is flexible, meaning you can withdraw and replace money in the same tax year without losing that slice of your allowance.

For where this money should actually live, see our guide to where to keep your emergency fund.

Is your money safe with either?

Neither Plum nor Moneybox is a bank. Both are authorised by the Financial Conduct Authority, and your cash sits in accounts provided by partner banks, which is where the protection comes from. When your money is held in an FSCS-protected savings account or ISA, it is covered up to £85,000 per banking licence, the same as money in a high-street account. You can confirm any provider’s status on the FSCS check your money is protected tool.

Invested money is different. Funds and shares held in a Stocks and Shares ISA or Lifetime ISA can fall as well as rise, so FSCS cover protects against the provider failing, not against your investments losing value. That applies to both apps.

Plum vs Moneybox: which should you pick?

Choose Plum if you want genuinely hands-off saving, you like the app deciding what you can spare, and you only want light, simple investing alongside it.

Choose Moneybox if you want the wider investing range, the full ISA suite including the Lifetime ISA, or you prefer the visible habit of rounding up everyday spending.

For a pure automatic saver who wants money moved without lifting a finger, Plum edges it. For someone building toward a first home or wanting more control over how they invest, Moneybox is the better long-term home. Either way, the app is the nudge; the fees and the live interest rate are what decide whether it is worth keeping.

If you are still weighing it up, read our full Is Plum worth it review and, when it lands, our Moneybox review before you decide.

Frequently asked questions

Is Plum or Moneybox better for investing? Moneybox has the wider investing range: tracker funds, managed portfolios, ETFs and some US shares, plus the full ISA suite including a Lifetime ISA. Plum keeps investing simpler, offering mutual funds and a pension but no Lifetime ISA, which suits people who do not want to pick investments themselves.

Do Plum and Moneybox charge fees? Yes. Both charge a monthly subscription for paid features and add a percentage fee on invested money each year. On small balances the flat subscription matters most; on larger balances the percentage fee grows. Both change their pricing, so check the live terms before committing.

Is my money FSCS protected with Plum and Moneybox? Cash held in an FSCS-protected savings account or ISA behind either app is covered up to £85,000 per banking licence, because the money sits with partner banks. Invested money is not protected against falls in value; FSCS cover applies to provider failure, not investment losses.

Can I use Plum and Moneybox at the same time? Yes, nothing stops you running both, and some people use Plum for automated saving and Moneybox for its Lifetime ISA. The downside is two subscriptions and two apps to track, so most savers settle on one once they know which style suits them.

Which app is better for a first home deposit? Moneybox, because it offers a Lifetime ISA, which adds a 25% government bonus on up to £4,000 saved each year toward a first home. Plum does not offer a Lifetime ISA, so it cannot capture that bonus.