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3 UK Passive Income Ideas to Make £100+ Monthly

Written by Charlie (Admin)Updated 22 September 2026
3 UK Passive Income Ideas to Make £100+ Monthly
What’s in this guide4 sectionsShow
  1. 11. Unbanx
  2. 22. Airtime Rewards
  3. 33. MSR App
  4. 4Maximise Your Passive Earnings

At My Side Gig, we’re proud to be the home of UK free money offers, helping you unlock easy ways to earn cash with minimal effort. Our list of £810+ worth of offers is packed with opportunities from companies that will pay you just for signing up!

When it comes to passive income, we know the term can be a bit misleading. Truly passive income streams usually require a hefty upfront investment or a significant time commitment. But the offers we’ve curated require only a small amount of effort upfront or light maintenance to keep the cash flowing.

Here are three UK companies offering passive income ideas that could help you make £100+ monthly:

1. Unbanx

Sign up for Unbanx

Unbanx rewards you for securely sharing anonymized spending data. It’s a unique way to earn money without lifting a finger. Once connected, Unbanx automatically tracks your transactions, and you earn points for sharing data, which you can redeem for cash.

Why it’s passive: The setup takes a few minutes, and then it’s entirely hands-off.

2. Airtime Rewards

Get started with Airtime Rewards

Shop as usual and earn cashback on purchases from partner retailers like Boots, Argos, and Wilko. Your rewards go toward reducing your phone bill or can be cashed out.

Why it’s passive: Link your debit or credit card once, and Airtime Rewards automatically tracks eligible spending.

3. MSR App

Check out the MSR App

MSR lets you earn rewards by sharing your data. Examples of data you can share monthly include: Amazon (£2.50), ChatGPT, Discord, Facebook, Google (£1.20 each), Instagram, Snapchat, TikTok (£1.00 each), and Reddit, app purchase data (£0.80 each).

Why it’s passive: Once installed, you earn simply by having the app active.

Maximise Your Passive Earnings

To boost your earnings even further, make sure you explore the full list of £810+ worth of offers on our website. These opportunities often come with sign-up bonuses that are too good to miss.