Many UK small businesses discover they are underinsured only after submitting a claim — by which point the insurer applies a proportional reduction to any payout. That reduction can be devastating. Reviewing your cover proactively is one of the most cost-effective things you can do before your next renewal.
Why Underinsurance Is More Common Than Business Owners Realise
Insurers apply the average clause when a declared value is materially lower than the true replacement figure. For example, if your stock is insured for £100,000 but its actual replacement cost is £200,000, the insurer may settle a £50,000 claim for just £25,000.
Rising material costs, supply chain pressures, and persistent inflation have widened the gap between what many policies say and what reinstatement actually costs in 2026. Policies set two or three years ago often carry values that no longer reflect reality.
Checking Stock, Equipment, and Premises Values
Start with your physical assets. Stock should be valued at its full replacement cost — what you would pay to repurchase it today, not what you paid historically.
Equipment and machinery values should reflect current market replacement prices, factoring in lead times and installation. Specialist kit often costs considerably more to source and commission than its book value suggests.
For commercial premises, the sum insured should reflect the rebuilding cost, not the market value or rateable value. A professional reinstatement valuation from a chartered surveyor gives the most defensible figure and should be updated every three to five years at minimum.
Step-by-Step: Reviewing Your Business Insurance Cover
- Step 1 — Pull your current schedule: Retrieve your policy document and note every sum insured, sublimit, and declared value.
- Step 2 — Revalue your stock: Use your latest purchase invoices and supplier price lists to calculate a current full replacement figure.
- Step 3 — Revalue your equipment: Check manufacturer or distributor current pricing for each significant asset and include installation costs.
- Step 4 — Commission or review a rebuilding cost assessment: If your premises reinstatement figure has not been professionally assessed recently, arrange one before renewal.
- Step 5 — Check your business interruption limit: Calculate how much gross profit or revenue you would need to cover for a realistic recovery period — typically 12 to 24 months — and ensure the indemnity period matches that window.
- Step 6 — Review liability limits: Confirm your public liability and employers liability limits are appropriate for your contract obligations, client requirements, and workforce size.
- Step 7 — Read the exclusions and inner limits: Note any sublimits for specific perils, seasonal stock increases, or high-value items that may require separate scheduling.
Business Interruption, Liability, and Policy Exclusions
Business interruption cover is frequently underestimated because owners focus on the sum insured rather than the indemnity period. If your business took 18 months to recover from a fire but your policy only covers 12 months, the gap is your liability.
Public liability and employers liability limits are sometimes set at the minimum required by a contract rather than the level appropriate for the actual risk. Review these whenever you take on new clients, new premises, or additional staff.
Inner limits and exclusions deserve close attention. Many policies carry sublimits for theft of cash, deterioration of stock, or damage caused by specific events. If those sublimits are significantly lower than your realistic exposure, discuss a revision with your broker.
Action Checklist
- Retrieve your full policy schedule and note every declared value and sublimit.
- Revalue stock at current replacement cost using up-to-date supplier pricing.
- Obtain a professional rebuild cost assessment for any owned commercial premises.
- Calculate the realistic recovery period for your business and check your indemnity period matches it.
- Confirm liability limits against your largest contract requirements and workforce size.
- Read all exclusions and inner limits and flag any that appear misaligned with your actual risk profile.
- Schedule a cover review with a commercial insurance broker ahead of every renewal.
