# Referral Plug

> Referral Plug is an independent UK editorial site that publishes verified refer-a-friend referral codes (across energy, banking, fintech, mobile and more), personally tested by founder Seb Place.

- Author: Seb Place (personal finance writer, UK consumer savings specialist, Referral Plug founder)
- Focus: UK referral codes, refer-a-friend schemes, cost-of-living deals
- Updated: referral rewards last verified September 2026; each page shows its own last-tested date

## Key Pages
- [Octopus Energy savings calculator](https://www.referralplug.co.uk/tools/octopus-energy-savings-calculator): regional Ofgem price cap rates (1 July to 30 September 2026) vs Octopus Flexible, plus the £50 referral credit (rates refreshed each build)
- [Monzo plan picker](https://www.referralplug.co.uk/tools/monzo-plan-picker): which Monzo plan pays for itself, Free vs Extra £3/mo vs Perks £9/mo vs Max £19/mo, resolved to net £/year on your own savings balance and perk usage (plan facts read August 2026)
- [UK energy refer-a-friend league table, CSV](https://www.referralplug.co.uk/data/uk-energy-refer-a-friend-league-table-2026.csv): original research, one row per supplier with reward, payment form, timing, caps and the source URL each figure was read from
- [Best UK referral codes](https://www.referralplug.co.uk/best-uk-referral-codes): compare all UK referral codes side by side (updated regularly), plus the dated log of every change the weekly re-check has found
- [UK refer-a-friend index, CSV](https://www.referralplug.co.uk/data/uk-referral-codes.csv): original research, one row per brand with both sides' rewards, the qualifying requirement, payout timing, caps, scheme status and the URL on the brand's own site each figure was read from
- [UK refer-a-friend change log, CSV](https://www.referralplug.co.uk/data/uk-referral-scheme-changes.csv): every movement the weekly re-check has recorded, dated, with the value before and after
- [UK voucher codes](https://www.referralplug.co.uk/voucher-codes): voucher and discount codes (most brands we cover run no public discount codes; a few do, with last-checked dates)
- [What is a referral code?](https://www.referralplug.co.uk/what-is-a-referral-code): how referral codes work in the UK (complete guide)
- [About Referral Plug](https://www.referralplug.co.uk/about): who runs the site, and its editorial standards
- [Methodology](https://www.referralplug.co.uk/methodology): how Referral Plug tests every referral code (full process)

## Referral Code Pages
- [Monzo referral code](https://www.referralplug.co.uk/referral/monzo): £10, £20 or £50 (random); link: https://join.monzo.com/c/t832bmh1
- [Yonder referral code](https://www.referralplug.co.uk/referral/yonder): Up to 20,000 bonus points + £10 off + 2 months free (Full credit; up to 10,000 points on Full debit); link: https://join.yondercard.com/zw4fzgn
- [Octopus Energy referral code](https://www.referralplug.co.uk/referral/octopus-energy): £50 account credit; link: https://share.octopus.energy/ruby-snail-729
- [E.ON Next referral code](https://www.referralplug.co.uk/referral/eon-next): £50 retail voucher; link: https://mention-me.com/m/ol/dn9zr-seb-place
- [EDF referral code](https://www.referralplug.co.uk/referral/edf): £75 in bill credit (£50 after 6 October 2026); link: https://www.edfenergy.com/quote/refer-a-friend/absurd-salt-5465
- [Starling Bank referral code](https://www.referralplug.co.uk/referral/starling): £25 (added to a Space) (paused)
- [InvestEngine referral code](https://www.referralplug.co.uk/referral/investengine): Bonus worth £20–£200 (randomly generated); link: https://investengine.com/referral/u/efx19q/
- [Zilch referral code](https://www.referralplug.co.uk/referral/zilch): £5 in Zilch rewards; link: https://zilch.onelink.me/x8EV/8gurm5u5
- [Motorway referral code](https://www.referralplug.co.uk/referral/motorway): £50 Amazon gift card; link: https://motorway.mention-me.com/m/nsmc/in7nx-seb-place
- [VOXI referral code](https://www.referralplug.co.uk/referral/voxi): Amazon, PayPal, or Just Eat voucher up to £40 (doubled until 7 Oct 2026); link: https://join.voxi.co.uk/ariolam-7
- [giffgaff referral code](https://www.referralplug.co.uk/referral/giffgaff): £5 in giffgaff credit; link: https://www.giffgaff.com/orders/affiliate/mariaplace
- [Freetrade referral code](https://www.referralplug.co.uk/referral/freetrade): Free share worth £10–£100; link: https://magic.freetrade.io/join/sebastian/9f6a1e93
- [Ledger referral code](https://www.referralplug.co.uk/referral/ledger): $5 to $20 in Bitcoin, depending on the device; link: https://shop.ledger.com/pages/referral-program?referral_code=C7EJ5ADR006QB
- [Tide referral code](https://www.referralplug.co.uk/referral/tide): £100 account credit; link: https://www.tide.co/refer-a-friend/?referralCode=JOPOQW
- [Bitrefill referral code](https://www.referralplug.co.uk/referral/bitrefill): $5 in Bitcoin; link: https://www.bitrefill.com/invite/hin71zwk
- [Surfshark referral code](https://www.referralplug.co.uk/referral/surfshark): 1 free month on the 1-month plan, or 3 free months on the 12 or 24-month plan; link: https://surfshark.club/friend/PGZqqYUx
- [Proton referral code](https://www.referralplug.co.uk/referral/proton): $20 off your first paid plan (Mail, VPN, Drive, Pass or the full suite); link: https://pr.tn/ref/CQ85852V
- [THE OUT referral code](https://www.referralplug.co.uk/referral/the-out): £50 off first booking; link: https://www.theout.com/refer; code: CI311
- [BA Amex referral code](https://www.referralplug.co.uk/referral/amex): 15,000 Avios points; link: https://americanexpress.com/en-gb/referral/ba-classic-credit?ref=sEBAsPDn5S&XL=MIANS
- [Incard referral code](https://www.referralplug.co.uk/referral/incard): Boosted 2x cashback for 60 days + fast-tracked review; link: https://app.incard.com/r/qgAnTA
- [TopCashback referral code](https://www.referralplug.co.uk/referral/topcashback): £10 sign-up bonus; link: https://www.topcashback.co.uk/ref/member8136628296205
- [Quidco referral code](https://www.referralplug.co.uk/referral/quidco): £10 bonus; link: https://quidco.com/raf/re7cea9bca1c0e044f0ff9202/
- [Rakuten referral code](https://www.referralplug.co.uk/referral/rakuten): £25 bonus; link: https://www.rakuten.co.uk/r/SEBPLA3?eeid=28187
- [Hyperoptic referral code](https://www.referralplug.co.uk/referral/hyperoptic): An Amazon, Tesco or John Lewis voucher worth £25, £40, £50 or £75, set by speed and contract length; link: https://refer.hyperoptic.com/sebastianp-1864; code: 11ZP5SJ
- [Quickline referral code](https://www.referralplug.co.uk/referral/quickline): £100; link: https://refer.quickline.co.uk/sebastianp-1856
- [toob referral code](https://www.referralplug.co.uk/referral/toob): £25 gift card; link: https://rewards.toob.co.uk/sebp-37
- [Airband referral code](https://www.referralplug.co.uk/referral/airband): £50; link: https://aklam.io/ltDSoN2u
- [Zzoomm referral code](https://www.referralplug.co.uk/referral/zzoomm): £75 in cash; link: https://aklam.io/o3nGjebp
- [Affordable Mobiles referral code](https://www.referralplug.co.uk/referral/affordable-mobiles): Up to £60 cashback (paused)

## Categories
- [Banking & Finance referral codes](https://www.referralplug.co.uk/referral/category/banking): Monzo, Yonder, Zilch, Tide, BA Amex, Incard
- [Energy referral codes](https://www.referralplug.co.uk/referral/category/energy): Octopus Energy, E.ON Next, EDF
- [Broadband referral codes](https://www.referralplug.co.uk/referral/category/broadband): Hyperoptic, Quickline, toob, Airband, Zzoomm
- [Mobile referral codes](https://www.referralplug.co.uk/referral/category/mobile): VOXI, giffgaff
- [Cashback referral codes](https://www.referralplug.co.uk/referral/category/cashback): TopCashback, Quidco, Rakuten
- [Trading & Crypto referral codes](https://www.referralplug.co.uk/referral/category/trading): InvestEngine, Freetrade, Ledger, Bitrefill
- [VPN referral codes](https://www.referralplug.co.uk/referral/category/vpn): Surfshark
- [Privacy tools referral codes](https://www.referralplug.co.uk/referral/category/privacy-tools): Proton
- [Car referral codes](https://www.referralplug.co.uk/referral/category/car): Motorway
- [Car hire referral codes](https://www.referralplug.co.uk/referral/category/car-hire): THE OUT

## Blog
- [Is EDF Flextras worth joining? A member from launch week](https://www.referralplug.co.uk/blog/is-edf-flextras-worth-it)
- [Is the Proton free plan enough? I used 8% of it in three years](https://www.referralplug.co.uk/blog/is-the-proton-free-plan-enough)
- [Motorway fees: £29.99 to £99.99 to sell your car since May 2026](https://www.referralplug.co.uk/blog/motorway-fees-what-it-costs-to-sell-your-car)
- [October 2026 price cap: what actually changes on your bill](https://www.referralplug.co.uk/blog/october-2026-price-cap)
- [This energy supplier switching trick could save you £100](https://www.referralplug.co.uk/blog/different-suppliers-for-gas-and-electricity)
- [THE OUT vs Turo, Avis Prestige and Sixt: who delivers to your door](https://www.referralplug.co.uk/blog/the-out-vs-turo-avis-prestige-sixt)
- [What do reviewers say about THE OUT? Five reviews, none since 2022](https://www.referralplug.co.uk/blog/what-do-reviewers-say-about-the-out)
- [giffgaff Super Recruiter: what changes at your 15th recruit](https://www.referralplug.co.uk/blog/giffgaff-refer-a-friend-payback)
- [How much does THE OUT car hire cost? Every fee, sourced](https://www.referralplug.co.uk/blog/how-much-does-the-out-cost)
- [Business bank account referral bonuses: Tide £100, Monzo £50](https://www.referralplug.co.uk/blog/business-bank-account-referral-bonus-uk)
- [UK rewards card points value 2026: what a point is really worth](https://www.referralplug.co.uk/blog/uk-rewards-card-points-value)
- [InvestEngine cashback: £5 at TopCashback vs a £20–£200 bonus](https://www.referralplug.co.uk/blog/investengine-cashback-vs-referral-bonus)
- [Surfshark vs NordVPN: is the cheaper Nord-owned sibling worth it?](https://www.referralplug.co.uk/blog/surfshark-vs-nordvpn)
- [How to redeem Yonder points for the most value (2026)](https://www.referralplug.co.uk/blog/how-to-redeem-yonder-points)
- [Is Surfshark worth it? A 4-year verdict, and what I paid](https://www.referralplug.co.uk/blog/is-surfshark-worth-it)
- [Octopus Energy EV charger installation: cost, process and referral](https://www.referralplug.co.uk/blog/octopus-ev-charger-installation)
- [Yonder points value 2026: what are Yonder points really worth?](https://www.referralplug.co.uk/blog/what-are-yonder-points-worth)
- [How much does Surfshark cost in the UK, and how to get it cheapest](https://www.referralplug.co.uk/blog/how-much-does-surfshark-cost-in-the-uk)
- [UK energy refer-a-friend league table (2026): who actually pays what](https://www.referralplug.co.uk/blog/energy-refer-a-friend-league-table)
- [British Gas referral code 2026: how it works, and how it compares](https://www.referralplug.co.uk/blog/british-gas-referral-code)
- [ScottishPower referral code 2026: how it works, and how it compares](https://www.referralplug.co.uk/blog/scottishpower-referral-code)
- [Shell Energy referral code 2026: what happened, and what to do now](https://www.referralplug.co.uk/blog/shell-energy-referral-code)
- [Octopus heat pump & solar referral: get a £100 gift card each](https://www.referralplug.co.uk/blog/octopus-heat-pump-and-solar-referral)
- [Best UK bank referral bonuses in 2026: every scheme we've tested](https://www.referralplug.co.uk/blog/best-bank-referral-bonuses-uk)
- [UK voucher code sites compared: how often the codes actually work](https://www.referralplug.co.uk/blog/uk-voucher-code-sites-compared)
- [Where this guide disagrees with Which? on Octopus Energy](https://www.referralplug.co.uk/blog/where-this-guide-disagrees-with-which-on-octopus)
- [What do reviewers say about Yonder? Every UK review compared (2026)](https://www.referralplug.co.uk/blog/what-do-reviewers-say-about-yonder)
- [What does MoneySavingExpert say about Monzo vs Chase?](https://www.referralplug.co.uk/blog/why-mse-recommends-chase-over-monzo-for-cashback)
- [What does Which? say about giffgaff?](https://www.referralplug.co.uk/blog/what-does-which-say-about-giffgaff)
- [Best second UK bank account to pair with Monzo (2026)](https://www.referralplug.co.uk/blog/best-second-bank-account-uk)
- [E.ON Next for EV owners: is Next Drive worth it?](https://www.referralplug.co.uk/blog/eon-next-for-ev-owners-is-next-drive-worth-it)
- [E.ON Next vs British Gas referral: which gives you more?](https://www.referralplug.co.uk/blog/eon-next-vs-british-gas-referral)
- [Is Monzo Max worth it? £19/month, Max vs Perks vs Extra (2026)](https://www.referralplug.co.uk/blog/monzo-extra-vs-perks-vs-max)
- [Monzo referral not working? How to fix it](https://www.referralplug.co.uk/blog/monzo-referral-not-working)
- [What does Martin Lewis say about Monzo?](https://www.referralplug.co.uk/blog/what-does-martin-lewis-say-about-monzo)
- [Monzo vs Starling Bank: which digital bank is better in 2026?](https://www.referralplug.co.uk/blog/monzo-vs-starling)
- [What does Martin Lewis say about Octopus Energy?](https://www.referralplug.co.uk/blog/what-does-martin-lewis-say-about-octopus-energy)
- [How to switch to Octopus Energy: a screen-by-screen guide (2026)](https://www.referralplug.co.uk/blog/how-to-switch-to-octopus-energy)
- [Moving house with Octopus Energy: two moves, no phone calls](https://www.referralplug.co.uk/blog/can-i-switch-energy-supplier-if-im-moving-house)
- [Octopus Energy for landlords: how the referral works (2026 guide)](https://www.referralplug.co.uk/blog/octopus-energy-for-landlords)
- [Octopus Energy no standing charge: is it possible? (2026 guide)](https://www.referralplug.co.uk/blog/octopus-energy-no-standing-charge)
- [Who is cheaper than Octopus Energy? (2026)](https://www.referralplug.co.uk/blog/who-is-cheaper-than-octopus-energy)
- [Which Octopus Energy tariff is right for you? (2026 guide)](https://www.referralplug.co.uk/blog/which-octopus-tariff-is-right-for-you)
- [Is Tide worth it? A hands-on business account review](https://www.referralplug.co.uk/blog/is-tide-worth-it)
- [Is VOXI worth it? A hands-on mobile network review](https://www.referralplug.co.uk/blog/is-voxi-worth-it)
- [Is Motorway worth it? A review from someone who sold a car](https://www.referralplug.co.uk/blog/is-motorway-worth-it)
- [Is a Ledger wallet worth it? A review after 6 years](https://www.referralplug.co.uk/blog/is-ledger-worth-it)
- [Is giffgaff worth it? A review after 15 years](https://www.referralplug.co.uk/blog/is-giffgaff-worth-it)
- [Is Freetrade worth it? A hands-on investing app review](https://www.referralplug.co.uk/blog/is-freetrade-worth-it)
- [Is the BA Amex worth it? British Airways credit card review](https://www.referralplug.co.uk/blog/is-amex-worth-it)
- [Is Bitrefill worth it? A review for spending crypto](https://www.referralplug.co.uk/blog/is-bitrefill-worth-it)
- [Is E.ON Next worth it? A review after 4 years](https://www.referralplug.co.uk/blog/is-eon-next-worth-it)
- [Is Monzo worth it? A review after 9 years as a customer](https://www.referralplug.co.uk/blog/is-monzo-worth-it)
- [Is Yonder worth it? My Yonder credit card review, 8 months in (2026)](https://www.referralplug.co.uk/blog/is-yonder-worth-it)
- [Affordable Mobiles review: is it legit and worth buying from?](https://www.referralplug.co.uk/blog/affordable-mobiles-review-is-it-legit)
- [How to spend Bitcoin in the UK: gift cards, top-ups and more](https://www.referralplug.co.uk/blog/how-to-spend-bitcoin-uk)
- [Best crypto hardware wallet: Ledger vs Trezor compared](https://www.referralplug.co.uk/blog/best-crypto-hardware-wallet-ledger-vs-trezor)
- [Zilch buy now pay later: is the 2% cashback any good?](https://www.referralplug.co.uk/blog/zilch-review-buy-now-pay-later)
- [Octopus Energy review: 6 years as a customer](https://www.referralplug.co.uk/blog/octopus-energy-review-is-it-right-for-you)
- [Monzo joint account review (2026): how it works after 4 years](https://www.referralplug.co.uk/blog/monzo-joint-account-review)
- [Best bank for travel abroad UK 2026: Starling cash, Monzo card](https://www.referralplug.co.uk/blog/best-bank-for-travel-abroad-uk)
- [EV Charger Installation: Guide to Home EV Charging in the UK](https://www.referralplug.co.uk/blog/ev-chargers)
- [Octopus Energy for Business: what's included and the £75 referral](https://www.referralplug.co.uk/blog/why-switch-to-octopus-for-business)
- [Monzo Flex review: is the interest-free BNPL card worth it?](https://www.referralplug.co.uk/blog/monzo-flex-review)
- [Monzo vs Chase UK 2026: 2% cashback vs better budgeting](https://www.referralplug.co.uk/blog/monzo-vs-chase)
- [Monzo Business for freelancers: a review from a real sole trader](https://www.referralplug.co.uk/blog/monzo-business-for-freelancers)
- [Monzo mystery reward: the odds behind the £10, £20 or £50](https://www.referralplug.co.uk/blog/monzo-mystery-reward-explained)
- [Monzo vs Nationwide: which current account is actually better?](https://www.referralplug.co.uk/blog/monzo-vs-nationwide)
- [What is Monzo Billsback, and is it worth it? 2026 review](https://www.referralplug.co.uk/blog/monzo-billsback-review)
- [Octopus Energy vs E.ON Next: which is cheaper, and which pays more?](https://www.referralplug.co.uk/blog/octopus-energy-vs-eon-next-referral)
- [Yonder vs Amex Gold: Amex takes year one, Yonder wins the long run](https://www.referralplug.co.uk/blog/yonder-vs-amex-referral)
- [VOXI vs giffgaff 2026: is VOXI better than giffgaff?](https://www.referralplug.co.uk/blog/voxi-vs-giffgaff-referral)
- [How to claim the VOXI gift card, and what if it doesn’t arrive](https://www.referralplug.co.uk/blog/voxi-referral-code-gift-card)
- [How to claim the giffgaff credit, and what if it doesn’t appear](https://www.referralplug.co.uk/blog/giffgaff-referral-code-bonus)
- [Affordable Mobiles discount code, voucher & referral link](https://www.referralplug.co.uk/blog/affordable-mobiles-referrals)

## Optional
- [Expanded per-brand reference](https://www.referralplug.co.uk/llms-full.txt): entity claim, reward, link and FAQs for every brand