What is a referral code? A plain-English UK guide
6 min read · Updated · By the HelloBonus team
The short answer
A referral code is a personal invite from someone who already uses a brand. When you join with it and do what the brand asks (for example, make one card payment), the brand rewards you, the person who invited you, or both. It never costs you extra: the brand pays the reward because a recommendation brings in a new customer.
How a referral bonus works, step by step
- An existing customer shares their personal code or invite link. Many apps show it under “Invite friends” or “Refer a friend”.
- You open the link or type the code when you sign up. For many banking apps the link must be opened before you download the app, because the reward is tied to the phone number you enter on the invite page.
- You do the qualifying action within the time limit. It's usually small: one card payment, a first top-up, a first order or a first deposit.
- The brand pays the reward. Often both people get something, and the brand tells you in the app or by email when it's done.
Each brand sets its own rules in its referral terms: who can join, what counts, how long you have and how much you get. Those terms always win, so a good code page links to them.
Referral codes vs discount codes vs cashback
These three are often mixed up. They work in different ways, and knowing the difference helps you spot which offers are real.
Swipe sideways to see the whole table →
| Topic | Referral code | Discount code | Cashback |
|---|---|---|---|
| Who creates it | A real customer of the brand | The brand or a partner site | A cashback site or card |
| Who can use it | Usually new customers only | Often anyone, sometimes first orders only | Members of the cashback site |
| What you get | A bonus after a small first action | Money off the price at checkout | Part of what you spent, paid back later |
| Who gets rewarded | Often both you and the person who invited you | You | You, and the cashback site earns a commission |
| Typical example | A bank app giving £10 after your first card payment | 10% off your first order | 2% back on a purchase |
Why do brands pay for referrals?
Because a recommendation from someone you know works better than an advert. Instead of spending that money on ads, the brand shares it with the people who bring in new customers, and with the new customers themselves. That's why using a referral code doesn't cost you anything extra.
Is it safe to use someone else's referral code?
Yes, as long as the link goes to the brand's own website or app. Your account is between you and the brand. The person who invited you doesn't get your login, your card details or access to your money.
- Check the web address. A Monzo invite, for example, opens on join.monzo.com.
- Never pay anyone for a referral code. Real codes are free.
- Never share your passwords, card numbers or security codes with the person who invited you.
- Some brands tell the referrer how you're getting on. Monzo's terms, for example, say the referrer can be told when you've added your number, opened an account, made your first payment and received your reward.
Six mistakes that cost people their bonus
- Downloading the app before opening the invite link, so the brand never connects you to the invite.
- Signing up with a different phone number or email address from the one entered on the invite page.
- Doing the wrong first action, such as a cash machine withdrawal or bank transfer when the terms ask for a card payment.
- Missing the deadline. Many offers give you 30 days or less.
- Having had an account before. Most offers are for brand-new customers only, even if your old account is closed.
- Trying to use two codes, or referring yourself. Brands can cancel rewards for this.
How to spot an honest referral code website
- It shows the date each code was last checked.
- It shows the full reward: the top amount, what most people get and the brand's own odds.
- It links to the brand's own terms.
- It says clearly that the link is its own and that it gets a reward too.
- It doesn't hide codes behind pop-ups, email sign-ups or “reveal” buttons.
That's the standard HelloBonus holds itself to. You can read exactly how we check every code on our How we check page.
Codes we've checked
Questions people ask
What's the difference between a referral code and a referral link?
They do the same job. A code is a short word or string you type in when you sign up. A link has the code built in, so the brand connects you automatically. Some brands, like Monzo, only use links.
Can I use more than one referral code for the same brand?
Almost never. Brands pay one referral reward per new customer, so only the first code or link you use counts.
Can I refer myself?
No. Brands don't allow it and can cancel rewards or close accounts when they spot it.
Can I get a referral bonus if I've had an account before?
Usually not. Most UK referral offers are only for people who have never had an account with that brand, even a closed one.
Does using a referral code cost me anything?
No. You pay the same as anyone else. The brand pays the reward from its marketing budget.
Want to know how we verify every bonus? Read our checking process.