The Three Core Eligibility Rules That Matter Most
British Gas enforces three non-negotiable eligibility criteria that determine whether you can claim the referral reward: you must be a new customer with no active British Gas account in the past 3 months, you must switch using an active referral link (not a comparison website), and you must remain an active customer for the full 90-day qualifying period from supply start date. Fail any one of these, and your reward is forfeited automatically—there are no exceptions and no appeals process once the system has flagged your account as ineligible.
The "3-month rule" is the first barrier. If you held a British Gas account at any point within the 3 calendar months before you apply, the system will reject you at the eligibility check stage, before you even complete your quote. This rule applies even if you cancelled your previous account in good standing or switched away voluntarily. The clock resets on the date your previous account was formally closed by British Gas (not the date you requested cancellation), so if you cancelled on 1 March, you cannot re-join until 1 June. If you are unsure when your account closed, contact British Gas Customer Service with your old account number; they can confirm the exact closure date and tell you when you become eligible again.
The referral link requirement is equally strict. You must access the offer through a unique referral link generated by an existing British Gas customer—typically shared via email, text, or the British Gas App. If you search for British Gas on a comparison website (MoneySuperMarket, Confused.com, GoCompare) and click through from there, that switch will not be tagged with the referral reward, even if you complete it and remain a customer for 90 days. The comparison site link overrides the referral link in British Gas's system, and there is no way to retroactively add the reward to your account. Always verify that the link you click shows the referrer's name and the offer value (e.g., "Switch with [Friend's Name] and earn £50") before proceeding.
Who Is Disqualified: The Hidden Exclusion Criteria
Beyond the three core rules, British Gas applies a second layer of exclusions that catch many applicants by surprise. Business accounts, commercial properties, holiday homes, and investment properties are automatically ineligible—the offer is restricted to primary residential addresses only. If your postcode is flagged as a business address or multi-unit building (flats in blocks with shared meters), the system may reject you at the quote stage, though you can appeal by contacting British Gas directly with proof of residential status (council tax bill, mortgage statement).
Previous account holders face a hidden trap: if you held a British Gas account within the past 3 months and that account was cancelled due to arrears, non-payment, or breach of contract (rather than a voluntary switch), British Gas may flag your identity in their system and reject your new application entirely, even after the 3-month period has passed. This is not published in the terms, but it does occur. If you have a history of payment issues with British Gas, contact them before applying to confirm your eligibility status; attempting to apply and being rejected will leave a record that may complicate future applications.
Customers switching only gas or only electricity (single-fuel switches) are eligible, but they receive £25 instead of £50. If you are in a flat with a communal heating system or a property where only one fuel is available, you will automatically qualify for the single-fuel reward tier. This is not a disqualification—it is simply a lower reward tier. However, some customers mistakenly believe they are ineligible for any reward if they cannot switch both fuels; in fact, you are eligible for £25, which is still a genuine saving.
Customers who cancel during the 14-day cooling-off period (the first 14 days after submitting your switching details) receive no reward and are not charged for the supply. This is a consumer protection right, but it forfeits the referral voucher. If you must cancel within 14 days, you will lose the reward entirely—there is no partial credit or deferral option. Plan your switch carefully and ensure you are genuinely ready to commit before clicking the referral link.
The 90-Day Qualifying Period: What "Remaining Active" Actually Means
The 90-day qualifying period is where most customers lose their rewards, often through actions they did not realise were disqualifying. British Gas counts 90 days from the date your supply goes live (the "supply start date"), not from the date you applied or the date you submitted your switching details. Your supply start date is typically 5–10 working days after you complete your application, and British Gas will confirm this in your confirmation email. Mark this date clearly in your calendar, then count forward 90 days—that is your target date for the voucher to arrive.
During these 90 days, you must remain an active customer with no account suspensions, cancellations, or service interruptions. "Active" means: your direct debit is set up and working correctly; you have made at least one successful payment (typically your first bill payment after supply goes live); you have not cancelled your account or requested to switch away; you have not been disconnected for non-payment; and you have not downgraded your service level (e.g., switching from dual fuel to single fuel). If any of these events occur, even on day 89, your reward is forfeited.
The most common disqualifier is a failed or missed direct debit payment. If your bank rejects a payment due to insufficient funds, a closed account, or a cancelled mandate, British Gas flags your account as "at-risk" and may suspend your supply. Even if you resolve the payment within a few days, the system has already recorded the failure, and this can trigger reward forfeiture. To avoid this, ensure your direct debit is set up immediately after your supply goes live, verify that your bank account details are correct, and confirm that you have sufficient funds to cover your first bill. Set a calendar reminder for your direct debit date and check your British Gas account online the day after payment is due to confirm it has cleared.
Cancellation during the 90-day period forfeits the reward entirely, with no exceptions. If you must leave British Gas early due to moving house, financial hardship, or dissatisfaction, contact British Gas Customer Service immediately to discuss your options. In rare cases, they may waive early-exit fees or allow you to pause your account temporarily, but they will not reinstate a forfeited reward. If you are considering cancelling, wait until day 91 to submit your cancellation request—this ensures the 90-day period has fully elapsed and your reward has been processed.
Account downgrades (e.g., switching from dual fuel to gas-only, or reducing your consumption level) may also trigger reward forfeiture, depending on how British Gas's system interprets the change. To be safe, do not make any changes to your account during the 90-day period. If you need to adjust your service level, wait until after day 90 and your voucher has arrived.
How to Verify Your Eligibility Before You Apply
Before clicking a referral link, take 5 minutes to confirm you meet the three core eligibility criteria. First, check whether you have held a British Gas account in the past 3 months by reviewing your email inbox for any British Gas communications or by logging into your previous British Gas online account (if it still exists). If you are unsure, call British Gas Customer Service on 0333 207 2804 and ask them to confirm the closure date of your previous account. Write down the date they provide, and do not apply until 3 months have passed from that date.
Second, verify that you have an active referral link from a genuine British Gas customer. Ask the person who is referring you to share their link directly with you, or ask them to generate a fresh link from their British Gas App (Rewards > Share My Link). Do not accept a link from a stranger on social media or a link you found on a forum—these are often expired or fraudulent. When you receive the link, click it and check that it displays the referrer's name and the offer value (e.g., "Switch with Sarah and earn £50") before proceeding further. If the link shows a generic British Gas page with no personalised referral details, it is expired and will not credit your account.
Third, confirm that you can switch both gas and electricity (dual fuel) from your address. Enter your postcode on the referral link and check whether British Gas offers both services in your area. If only one fuel is available, you will automatically qualify for the £25 single-fuel reward instead of £50—this is still valid, but you should be aware of the lower value. Some postcodes in Scotland or Northern Ireland may have limited availability; if British Gas cannot serve your address, you will not be able to claim this offer.
If you pass all three checks, you are eligible to apply. Proceed with confidence, but remember: once you submit your switching details, the 90-day clock starts counting down from your supply start date, not from today. Plan your application for a time when you are financially stable and certain you will not need to cancel within the next 3 months.
Common Eligibility Mistakes and How to Avoid Them
The most frequent eligibility mistake is applying through a comparison website instead of using the referral link directly. Customers often search "British Gas new customer offer" on Google, find a comparison site result, and click through to British Gas from there, believing they will receive the referral reward. In reality, the comparison site link overrides the referral link, and your switch is tagged as a comparison-site acquisition, not a referral. British Gas will not credit your account with the voucher, and there is no way to fix this retroactively. Always access the offer through the referral link provided by a friend or family member, never through a price-comparison aggregator.
The second mistake is misunderstanding the 3-month rule. Customers often think "3 months" means 3 calendar months (e.g., January to April), but British Gas counts 3 calendar months from the date your account was formally closed. If your account closed on 15 March, you cannot re-apply until 15 June. If you apply on 14 June, you will be rejected. Contact British Gas to confirm your exact closure date, then add 3 months to that date and apply only after that date has passed.
The third mistake is cancelling during the cooling-off period and expecting a partial reward. The cooling-off period (first 14 days) is a consumer protection that allows you to cancel without penalty, but it also forfeits your referral reward entirely. If you are unsure about switching, do not apply yet—wait until you are certain, then apply and commit to the full 90-day period.
The fourth mistake is failing to set up your direct debit correctly or allowing it to fail. After your supply goes live, log in to your British Gas online account immediately and verify that your direct debit mandate is active and your bank account details are correct. Set a calendar reminder for your direct debit payment date (typically the same date each month) and check your account the day after to confirm payment has cleared. If payment fails, contact your bank immediately to resolve the issue, then notify British Gas that you have corrected the problem. A single failed payment can trigger account suspension and reward forfeiture, so treat this as a priority.
The fifth mistake is making account changes during the 90-day period. Do not downgrade your service, switch from dual fuel to single fuel, change your tariff, or request any modifications to your account during the qualifying period. Even seemingly minor changes (like updating your payment method or changing your billing address) can trigger a system flag that delays or prevents reward processing. Wait until day 91 to make any changes.
What Happens After Day 90: When Your Voucher Should Arrive
Once you have completed the full 90-day qualifying period without cancellation, missed payments, or account suspensions, British Gas automatically processes your reward. You do not need to submit a claim form or contact customer service—the system handles this automatically. Typically, your voucher arrives between day 93 and day 104 (roughly 3–14 days after the 90-day mark), delivered via email to the address you provided during signup.
Check both your inbox and your spam/promotions folder, as voucher emails sometimes get filtered. The email will contain either an Amazon.co.uk voucher code (which you can redeem in your Amazon account immediately) or a PayPal/Hive Smart Credit voucher code (redeemable through those platforms). Once you receive the code, you can use it immediately—there is no expiration date unless stated in the voucher terms (which is rare for British Gas).
If you do not receive your voucher by day 105, log in to your British Gas online account and check your account history or account status page for any record of the referral reward. If you see a note confirming the reward has been processed, the voucher may simply be delayed in email delivery—wait another 5 days and check your spam folder again. If you see no record of the reward, or if your account status shows any flags (missed payments, cancellations, suspensions), contact British Gas Customer Service immediately with your account number and the date your supply went live. They can investigate whether the reward was forfeited due to account issues and, in rare cases, manually reissue the voucher if the system made an error.
If British Gas confirms that your reward was forfeited due to a missed payment, cancellation, or account suspension, the decision is final—there is no appeals process. This is why protecting your account status during the 90-day period is so critical. Set up your direct debit correctly, make your payments on time, and do not cancel or make changes to your account until day 91.
Check Your British Gas New Customer Code Eligibility Before Committing
Before you click a referral link and commit to switching, check your British Gas new customer code eligibility on our main offer page, where you can verify the current referral link is active, review the full terms and conditions, and confirm that the offer has not changed since this article was published. Our team verifies this offer daily, so the main page always reflects the most current reward value, delivery timeline, and eligibility criteria. If you have any doubts about whether you qualify, read the full terms on the main page before applying—this will give you complete confidence that you meet all conditions and will receive your reward.
UseMyCode Eligibility Tip: The single most important action you can take to protect your reward is to set up your direct debit on the day your supply goes live, not a week later. British Gas's system begins monitoring your account immediately, and a delayed or failed first payment can trigger a flag that jeopardises your entire reward. Log in to your online account within 24 hours of supply going live, confirm your direct debit is active, and verify that your bank account details are correct. This one step eliminates the most common reason for reward forfeiture.
About This Article
This article was written by the UseMyCode editorial team and last reviewed on 8 June 2026. UseMyCode independently verifies every referral link and discount code before publication. This page may contain affiliate links — see our editorial policy for details.
