Plum unveils Sunny Day Rule to boost savings

August 13, 2025

Smart money app Plum has rolled out its latest automated savings feature, the Sunny Day Rule, designed to help users put aside extra money during the summer months.

The concept is simple – each time the app detects sunny weather in a user’s registered location, it automatically transfers a set amount into their savings. The new feature draws inspiration from Plum’s Rainy Day Rule, which tucks away money whenever rain is recorded.

The Sunny Day Rule gives customers a choice of five preset amounts: Shady Spot (£1), Sunny Side Up (£2), Summer’s Here (£5), Beach Day (£10), and Blazing Hot (£20).

Based on last year’s 103 sunny days, someone using the Summer’s Here option could save £519 in a year, while those opting for the top-tier Blazing Hot setting could accumulate as much as £2,078 over the same period.

Automated savings are central to Plum’s offering, with more than 2 million people using the platform to save, invest, and manage spending.

The app’s existing rules are designed to make building savings effortless, removing the need for users to remember to move money manually. Alongside its default rule, which calculates savings based on income and expenditure patterns, Plum offers popular themed rules.

Examples include the Naughty Rule, which saves a set amount when a user shops at self-defined “guilty pleasure” retailers; the 1p Challenge, which increases savings by a penny each day to reach £667 annually; and the 52-week challenge, which grows weekly deposits to amass £1,378 in a year.

Plum senior product manager of automations Nivedhitha Selvam said, “Saving can often feel like an uphill struggle, especially at the moment, with cost of living challenges including rising utility bills, housing payments and council tax costs. That’s why many of our users find automation helpful when it comes to meeting their savings goals so they don’t have to actively do it themselves.

“Inspired by our popular Rainy Day Rule savings automation, our new Sunny Day Rule is brilliant for people who feel like they’re behind on saving and want to make their finances brighter! The new automated feature allows users to save each time the sun shines, without having to remember they’re doing it. Over the course of a few months, you’d be shocked at just how much you can save by setting a little money aside, but frequently thanks to this new automation.”