0300 numbers are known as non-geographic numbers, an alternative to phone numbers tied to a specific location. If you have a phone plan that includes calls to standard UK landline numbers beginning 01 or 02, then your 0300 phone call will normally be included within those minutes at no extra cost. Otherwise, calls to 0300 numbers must cost no more than an equivalent call to a UK 01 or 02 number.
In this article, Real Business will illustrate an overview of when 0300 numbers are free to call and the rules that make it so, so you’re not caught out as a business.
Are 0300 Numbers Free to call in the UK?
0300 numbers are not technically free to call, but for many people they won’t cost anything extra. Calls to 0300 numbers are charged at the same rate as standard UK landline numbers beginning with 01 or 02.
If your mobile or landline package includes calls to 01 and 02 numbers, 0300 calls must normally be included within those minutes too. This means you can call an 0300 number without paying an additional charge while you have inclusive minutes available.
If you don’t have inclusive minutes, have used them up, or are on a pay-as-you-go tariff, you’ll be charged your provider’s standard rate for calling an equivalent UK 01 or 02 number.
A few key things to remember:
- 0300 numbers are not Freephone numbers. UK Freephone numbers begin with 0800 or 0808.
- 0300 numbers are reserved for public sector bodies and not-for-profit bodies, including government departments, councils and registered charities.
- They cannot cost more to call than an equivalent 01 or 02 number from the same phone or tariff.
So, while an 0300 number isn’t automatically free, it will usually be free to call if 01 and 02 numbers are included in your phone plan and you still have inclusive minutes available.
What Are 0300 Numbers Used For?
0300 numbers are regulated by Ofcom and must cost no more than calls to standard geographic 01 and 02 numbers. They are reserved for public sector bodies and not-for-profit organisations, including government bodies, the NHS and registered charities, rather than ordinary commercial UK businesses. If your plan includes calls to 01 and 02 numbers, 0300 calls come out of the same inclusive minutes, so the details are broadly the same as calling a UK landline.
These numbers, being non-geographic, mean they are not tied to a particular location. However, they are UK-wide numbers – introduced by Ofcom in 2007 – which helps organisations present a national presence. Charities and other not-for-profit organisations are major users of these numbers, though they are also used by eligible public sector bodies, educational institutions, housing associations and other services; for example, a caller is charged as they would be for a geographic 01 or 02 number, while the organisation chooses a phone provider to manage routing.
When Are 0300 Numbers Free?
0300 numbers are effectively free to call when calling from a mobile or landline package with sufficient inclusive minutes for 01 and 02 numbers. Otherwise, the actual cost to call must be no more than the equivalent rate for a UK 01 or 02 number, so from a landline or mobile you may pay call costs if your contract or pay-as-you-go service does not include them. Check your phone company’s current pricing because out-of-bundle charges vary by provider and tariff.
Why Use 0300 Numbers?
Using 0300 numbers is good for both consumers and eligible organisations. For consumers, 0300 numbers are effectively free only when they are covered by inclusive minutes in a mobile or landline plan or bundle. Once you have exhausted your inclusive minutes, standard 01 and 02 rates apply, and pay-as-you-go callers may also pay standard rates. Out-of-bundle charges vary by provider and tariff, and charges can also differ when calling from outside the UK.
As for not-for-profit organisations or public services that utilise 0300 numbers, the benefits include a single, memorable point of contact, better management of inbound calls, improved access without the higher caller charges associated with some other non-geographic numbers, and a national presence for organisations that want to provide a consistent experience for callers regardless of where they are in the country.
Who Is Allowed To Use A 0300 Number? Public Bodies and Organisations
Users are only allowed to use a 0300 number if they are classified as an eligible organisation under Ofcom’s rules, principally public sector bodies and not-for-profit bodies such as registered charities. When applying for a 0300 number, a provider may ask the organisation to identify which category it falls into and provide information or supporting documents to confirm eligibility before setting up the service. For callers, this can improve access because 0300 numbers are charged like geographic calls rather than operating as Freephone numbers.

How Can 0300 Numbers Be Abused?
One way in which a 0300 number can be abused is through a method known as “spoofing”, where someone can call a customer using a fake version of a 0300 number and attempt to use that impersonation to gain information or even money from their victims.
If you are ever unsure about a call that you have received, it is best to end the call and contact the organisation directly using a known contact number to verify their identity.
Alternatives To 0300 Numbers
If 0300 numbers are not for you, you may want to consider other non-geographic numbers, such as 0333 numbers. Unlike 0300 numbers, 0333 numbers are not reserved specifically for public sector bodies and not-for-profit organisations, but they follow the same caller-pricing rules: calls must cost no more than equivalent 01 or 02 calls and must be included in call allowances in the same way.
Why Aren’t 0300 Numbers Free? Call Costs Explained
The cost-effective nature of 0300 numbers is useful, but many wonder why 0300 numbers are free only some of the time. The answers are simple:
- Maintenance – 0300 numbers are like other phone numbers in that providing and maintaining the service has a cost, with each provider setting its own charges to the organisation using the number and sometimes adding setup fees.
- Pricing model – 0300 numbers were designed to be charged to callers in the same way as 01 and 02 geographic numbers rather than as Freephone numbers.
- No revenue sharing – Organisations using 0300 numbers do not receive a share of what callers pay to make the call. Revenue sharing on calls to 03 numbers is prohibited by Ofcom.
After that, if an organisation wants callers to pay nothing at all, it may be better to use Freephone numbers such as 0800 or 0808.
Are 0300 Numbers Free: Conclusion
0300 numbers are a convenient and cost-effective method of providing contact services for a wide range of public sector and not-for-profit organisations. When calling, it’s important to remember that it’s only effectively free if you have sufficient inclusive minutes for 01 and 02 calls. Without this, you can be charged your provider’s standard rate for an equivalent UK 01 or 02 call.