# What is guaranteed minimum broadband speed?

> Quick answer · Last updated 4 July 2026

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## In short

Providers must give a minimum guaranteed download speed at sale. If speeds stay below this consistently, you may have grounds to leave penalty-free under Ofcom rules — keep speed test records.

Wi-Fi speeds inside the home are lower than line speed — test wired where possible.

Peak-time congestion affects cable and some fibre networks.

See compare broadband guide.

## Related

- [Compare broadband](https://moneyguide.org.uk/bills-utilities/compare-broadband-guide/)
- [Broadband switching guide](https://moneyguide.org.uk/bills-utilities/broadband-switching-guide/)

## Primary source

ofcom.org.uk/phones-and-broadband/coverage-and-speeds

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Independent UK money guidance from [Money Guide](https://moneyguide.org.uk). Information only — not regulated financial advice.