Stock & Work-in-Progress Insurance for Electrical Components: A Practical UK Guide

Introduction

If you manufacture, assemble, distribute, or repair electrical and electronic components, your “stock” is rarely just boxes on a shelf. It can be reels of surface-mount parts, PCBs awaiting test, high-value semiconductors in ESD-safe storage, or finished goods staged for dispatch. On top of that, work-in-progress (WIP) can represent weeks of labour, specialist processes, and customer deadlines.

Stock & Work-in-Progress Insurance is designed to protect those assets when something goes wrong—typically as part of a UK Commercial Combined or Business Insurance policy. The aim is simple: if your components, materials, or partly-finished goods are damaged, destroyed, or stolen, you can replace them and keep trading.

This guide explains what stock and WIP insurance usually covers, what to watch for in electrical components businesses, and how to set sums insured so you’re not caught short.

What counts as “stock” and “work-in-progress” in an electrical components business?

Insurers often use broad definitions, but in practice you’ll want your policy to reflect how your operation actually runs.

Stock may include:

• Raw materials (copper, plastics, housings, connectors, cable)
• Components (resistors, capacitors, ICs, relays, sensors)
• Sub-assemblies (PCBAs, harnesses, modules)
• Finished goods ready for sale
• Packaging, labels, manuals, barcodes
• Stock held temporarily in staging areas or despatch bays

Work-in-progress (WIP) may include:

• Items in assembly, soldering, potting, coating, or calibration
• Goods in test, burn-in, or quality control
• Customer-owned items being repaired (if you accept responsibility)
• Part-finished batches awaiting parts or rework

Because electrical components can be sensitive to heat, moisture, contamination, and static, the “how” of damage matters as much as the “what”. That’s why it’s worth being specific when arranging cover.

Where Stock & WIP Insurance sits in your wider cover

Most UK businesses buy this protection under one of these structures:

• Commercial Combined: A packaged policy that can include property damage, stock, WIP, business interruption, employers’ liability, public/products liability, and more.
• Business Insurance / Property Owners: Often used where the main risk is premises and contents, with stock added.
• Specialist manufacturing policies: More tailored wordings for complex production and testing environments.

For electrical components firms, it’s common to combine stock/WIP with:

• Business Interruption (BI) to protect gross profit if a fire or flood stops production
• Money and theft cover if you hold valuable items on site
• Goods in Transit if you ship high-value components
• Cyber Insurance if production, ordering, or fulfilment depends on systems

What is typically covered?

Cover varies by insurer and wording, but Stock & WIP Insurance commonly responds to physical loss or damage caused by insured events.

Typical insured events include:

• Fire, smoke, explosion
• Flood and escape of water (burst pipes, sprinkler discharge)
• Storm damage
• Theft (often requiring forcible and violent entry/exit)
• Impact (vehicle strike)
• Malicious damage

Depending on the policy, you may also be able to include:

• Accidental damage (broader protection, usually for an extra premium)
• Deterioration of stock following insured damage (e.g., power loss after a fire)

Stock and WIP: replacement cost vs cost price

A key point is how the insurer values what’s been lost.

• Stock is often insured at cost price (what you paid to buy or manufacture it), not the retail selling price.
• WIP should reflect materials plus labour and production overheads to the stage reached.

If your WIP includes specialist subcontract processes (e.g., conformal coating, CNC machining of housings, calibration), you may need to ensure those costs are included.

Common exclusions and tricky areas for electrical components

This is where many claims disputes start. The goal isn’t to scare you—just to help you avoid gaps.

1) Gradual deterioration, wear and tear, or inherent vice

Components can degrade due to humidity, corrosion, contamination, or poor storage conditions. Policies often exclude:

• Gradual deterioration
• Inherent vice (a tendency to self-damage)
• Rust, corrosion, mould

If you store moisture-sensitive devices (MSDs) or components with strict shelf-life controls, your storage processes matter.

2) Temperature and humidity control failures

If stock is damaged because HVAC fails or a dehumidifier stops, cover depends on wording. Some policies only respond if the failure is caused by an insured event (e.g., fire). Others can extend to cover temperature-controlled stock.

3) ESD (electrostatic discharge) and contamination

ESD damage may not be obvious immediately and can be classed as a process/handling issue. If you want protection for accidental damage during handling, you may need:

• Accidental damage extension
• Clear definitions of “damage” including functional failure

4) Faulty workmanship or defective design

If WIP is ruined because of a manufacturing error, many property policies exclude:

• Faulty workmanship
• Defective materials
• Rectification costs

However, there may still be cover for resulting damage caused by an insured event. It’s important to understand the difference.

5) Unattended vehicles and theft conditions

High-value components are attractive to thieves. Theft cover may require:

• Approved locks and alarms
• Security grading
• Stock kept in a locked room or safe outside business hours

If you store stock in a despatch bay or shared unit, check the security conditions carefully.

Setting the right sums insured (and avoiding underinsurance)

Underinsurance is one of the most common issues with stock and WIP claims. If your declared value is too low, insurers can apply “average”, reducing the payout.

Step 1: Identify your peak stock level

Don’t insure for an average month if you have seasonal spikes or bulk buys.

Consider:

• Lead times for semiconductors and specialist parts
• Price volatility
• Minimum order quantities
• Customer projects that require you to hold stock

Step 2: Calculate WIP at peak

WIP can jump when you have large batches in production or long test cycles.

Include:

• Materials consumed
• Labour to date
• Subcontract processing costs
• A fair share of production overheads

Step 3: Allow for inflation and supply chain changes

If replacement costs have risen, your sum insured needs to keep up. Index linking can help, but it’s not a substitute for a proper review.

Step 4: Consider stock at other locations

You may need cover for:

• Stock in outbuildings
• Stock in containers
• Stock at third-party warehouses
• Stock at exhibitions or trade shows

These often require separate sub-limits.

Stock and WIP away from your premises

Electrical components businesses frequently move goods between sites or to subcontractors.

You may need to add:

• Goods in Transit (own vehicles and couriers)
• Stock at third-party premises (including subcontractors)
• Worldwide/UK territorial limits depending on your supply chain

If you send items out for coating, machining, or calibration, check who is responsible for insurance while goods are off-site. Don’t assume the subcontractor’s policy automatically covers your property.

Business interruption: the cover that keeps you trading

Replacing stock is one thing. Losing production time is another.

Business interruption (BI) can cover:

• Lost gross profit while you recover
• Increased cost of working (e.g., outsourcing production)
• Extra rent for temporary premises

For electrical components, BI is especially important because:

• Lead times can be long
• Re-qualification/testing may be required
• Customer penalties and lost contracts can follow delays

Make sure your indemnity period (often 12 months by default) is long enough. Many manufacturers need 18–24 months.

Risk management that can reduce claims (and premiums)

Insurers like businesses that can show control over loss.

Practical steps include:

• Documented ESD controls (wrist straps, mats, audits)
• Humidity monitoring and logging
• Fire detection, extinguishers, and clear housekeeping
• Segregated storage for high-value items
• Secure cages or locked rooms for small, high-value components
• Good stock rotation and traceability
• Regular PAT testing and electrical safety checks
• Clear procedures for receiving, inspection, and quarantine of stock

If you can evidence these controls, it can help with both underwriting and claims.

Claims: what insurers will want to see

If you ever need to claim, being organised makes a big difference.

Expect to provide:

• Stock records (ERP, purchase invoices, batch lists)
• Valuation method (cost price, WIP calculation)
• Photos/CCTV where available
• Evidence of security measures (alarm maintenance, lock specs)
• Maintenance records (sprinklers, electrics, HVAC)

For WIP, clear job cards and production tracking can be the difference between a smooth settlement and a drawn-out dispute.

FAQs: Stock & WIP Insurance for electrical components

Does stock insurance cover semiconductors and high-value microchips?

Usually yes, as long as they are declared as stock and you meet any security conditions. Because values can be high and theft risk is real, insurers may apply sub-limits or require enhanced security.

Is WIP covered if it’s on the production line?

Typically yes, if WIP is included in the insured property and the damage is caused by an insured event (like fire or flood). You’ll need a sensible method for valuing WIP at different stages.

Does the policy cover damage caused by ESD?

Not always. ESD can be treated as a handling/process issue rather than a sudden insured event. If this is a key concern, ask for accidental damage and confirm how “damage” is defined.

What about customer goods we’re repairing?

You may need a specific “customers’ goods” or “goods held in trust” section. Don’t assume your stock cover automatically extends to customer property.

Are goods covered while with a courier?

Only if you have goods in transit cover (or a specific extension). Courier liability is often limited and may not reflect the true value of components.

Will underinsurance reduce my payout?

Yes, many policies apply average. If you insure £200,000 but should have insured £400,000, you may only receive around 50% of the claim (after excess).

How Insure24 can help

If you’d like, we can help you review your stock and WIP values, check security and storage requirements, and structure cover around how your business actually operates—especially if you hold high-value components or have long lead times.

For a quick quote or a chat about your options, call 0330 127 2333 or visit insure24.co.uk.

Disclaimer

This article is for general information only and does not constitute advice. Policy terms, conditions, exclusions, and limits vary by insurer. Always check the wording and speak with a regulated adviser about your specific needs.