Fire Risk Score Calculator

This tool estimates fire risk as Likelihood × Consequence, each scored 1–5, giving an indicative score (1–25) banded as Trivial, Tolerable, Moderate, Substantial or Intolerable — the standard UK fire-risk tolerability tiers used in HM Government fire safety risk assessment guidance. The likelihood × consequence matrix approach underpins risk-based fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005 and codes such as PAS 79-1:2020. Note that the specific scoring weights, the mitigation adjustment and the multipliers below are this tool’s own heuristic: PAS 79 / BS 9792 require a competent assessor’s professional judgement rather than a fixed formula, so treat this output as an indicative screening aid, not a completed assessment.

Every non-domestic premises and the common parts of residential buildings require a fire risk assessment under the Fire Safety Order 2005. The 'responsible person' (usually the employer, building owner or managing agent) must ensure a suitable and sufficient assessment is carried out and reviewed regularly.

There is no fixed legal interval under the Fire Safety Order 2005 — the responsible person must keep the assessment up to date and review it regularly. Common best practice (e.g. PAS 79-1:2020 for non-domestic premises and BS 9792:2025 for housing) is: review at least annually for most premises, more frequently for higher-risk buildings (HMOs, care homes), and immediately after any significant change, fire incident or near-miss. The review frequency should match the risk rating.

PAS 79 is a published code of practice for fire risk assessment methodology in the UK, giving a structured approach for identifying fire hazards, evaluating risk and recommending remedial actions. PAS 79-1:2020 covers premises other than housing (non-domestic premises such as offices, retail, schools and care homes) and remains current. PAS 79-2:2020 covered housing, but it was withdrawn on 31 August 2025 and replaced by BS 9792:2025 (Fire risk assessment for housing — Code of practice), which aligns with the Fire Safety Act 2021, the Fire Safety (England) Regulations 2022 and PAS 9980:2022. Use PAS 79-1 for non-domestic premises and BS 9792:2025 for the housing elements of a building.

For simple, low-risk premises the responsible person can carry out their own assessment using government guidance. For complex, high-risk or sleeping-risk premises (HMOs, care homes, large commercial), a competent fire risk assessor should be engaged. Competence schemes include BAFE SP205 and IFE registration.