Plant & Machinery Insurance for Engineering Workshops (UK): Complete Guide

Introduction

If you run an engineering workshop, your machines are your livelihood. A single CNC breakdown, a damaged compressor, or a stolen welder can stop production overnight, delay customer orders, and put cashflow under serious pressure.

Plant & machinery insurance (sometimes called machinery breakdown or engineering insurance) is designed to cover the sudden, unexpected failure or damage of workshop equipment. It can also be arranged to include loss of profits following a breakdown, plus cover for hired-in plant and portable tools.

This guide explains what plant & machinery insurance is, what it typically covers, common exclusions, and how to buy the right cover for an engineering workshop in the UK.

What is plant & machinery insurance?

Plant & machinery insurance is a specialist policy that protects mechanical and electrical equipment used in your business. For engineering workshops, that often includes:

• CNC machines, mills and lathes
• Presses, guillotines and brake presses
• Welding sets and fabrication equipment
• Air compressors, dryers and pipework
• Forklifts and workshop lifting gear
• Dust extraction and ventilation systems
• Electrical panels, drives, motors and control systems
• Boilers and pressure systems (where applicable)

Unlike standard commercial property insurance, which focuses on “insured events” like fire, flood or theft, plant & machinery insurance is aimed at internal failures and accidental damage to the equipment itself.

Why engineering workshops are high-risk for breakdown

Engineering environments put machines under constant stress. Common causes of breakdown include:

• Wear and tear accelerating due to heavy use
• Power surges damaging drives, inverters and control boards
• Coolant contamination affecting pumps and spindles
• Poor lubrication leading to bearing failure
• Operator error causing crashes or tool breakage
• Overheating in compressors and extraction systems
• Vibration and misalignment damaging motors and couplings

Even when the repair cost is manageable, the bigger issue is often downtime. If your workshop is booked weeks ahead, a single machine being out of action can create a domino effect across jobs, deliveries and customer relationships.

What does plant & machinery insurance typically cover?

Cover varies by insurer, but a well-built policy for an engineering workshop often includes the following.

1) Sudden and unforeseen breakdown

This is the core of the cover. It can include:

• Mechanical breakdown (gears, bearings, spindles, pumps)
• Electrical breakdown (motors, wiring, control panels)
• Electronic failure (CNC control units, PLCs, drives)

The key phrase is “sudden and unforeseen”. Insurers are generally looking to cover unexpected failures rather than gradual deterioration.

2) Accidental damage

Many policies can cover accidental damage to insured machinery, such as:

• Impact damage from moving equipment
• Dropped components during maintenance
• Tooling crashes on CNC machines

3) Repair and replacement costs

Depending on wording, the policy may cover:

• Parts and labour
• Rewinding motors
• Specialist engineer call-out
• Transport to a repair facility
• Reassembly and testing

Some policies can also include “expediting expenses” (extra costs to speed up repairs), which can be valuable if you need parts shipped urgently.

4) Business interruption following breakdown (optional but important)

This is often the difference between a minor problem and a serious one.

Business interruption (BI) cover linked to machinery breakdown can help with:

• Loss of gross profit due to reduced turnover
• Increased cost of working (for example outsourcing machining)
• Wages for key staff while production is disrupted

For workshops with a small number of critical machines, this add-on is worth discussing early.

5) Hired-in plant and tools (optional)

If you regularly hire equipment (for example specialist lifting gear or temporary compressors), hired-in plant cover can protect you against:

• Damage to hired equipment
• Your contractual responsibility to pay for repairs

6) Deterioration of stock / materials (where relevant)

Some engineering businesses hold temperature-sensitive materials, coatings, or products that can be affected if refrigeration, extraction or environmental systems fail. Where relevant, cover can be extended.

What’s usually NOT covered (common exclusions)

Plant & machinery insurance isn’t a maintenance contract. Common exclusions include:

• Wear and tear, gradual deterioration and corrosion
• Faults that existed before the policy started
• Poor maintenance or failure to follow manufacturer guidance
• Consumables (belts, filters, fuses) unless damaged by an insured event
• Damage that is purely cosmetic
• Known defects, recalls or design faults (varies by insurer)
• Damage caused by fire, flood or theft (often covered under property insurance instead)

This is why it’s important to coordinate your plant & machinery cover with your commercial property policy, so you don’t end up with gaps.

What equipment should an engineering workshop insure?

A practical approach is to list equipment that would cause major disruption if it failed. For many workshops, that includes:

• Primary production machines (CNC, lathes, mills)
• Compressed air system (compressor, dryer, receiver)
• Extraction and ventilation
• Overhead cranes, hoists and lifting systems
• Forklifts and material handling equipment
• Critical test and measurement equipment

Then decide whether to include:

• Portable tools and welding sets
• Older machines that are still essential
• Specialist or bespoke machinery with long lead times

If you’re unsure, think in terms of “single points of failure”. If one machine going down stops the whole workflow, it should be high on the list.

How sums insured and valuations work

Plant & machinery insurance is usually arranged on either:

• Specified items (each machine listed with a value), or
• Blanket cover (a total sum insured for a category of equipment)

For engineering workshops, specified items are common for high-value machines.

Replacement cost vs indemnity

• Replacement cost aims to put you back in the position you were in, replacing like-for-like new (or nearest modern equivalent).
• Indemnity reflects the item’s age and condition, paying a depreciated value.

For older but essential machines, indemnity settlements can be painful. If a machine is critical, discuss whether replacement cost is available and what evidence of value the insurer will want.

Key policy options to consider

A good broker will help tailor cover to your workshop. Useful options include:

Business interruption indemnity period

Choose a realistic period based on:

• Repair lead times
• Availability of specialist engineers
• Delivery times for parts (especially for older machines)
• The time it would take to outsource work

For some CNC equipment, a 3-month period can be tight. 6 or 12 months may be more appropriate for critical assets.

Increased cost of working

This can cover extra costs to keep trading, such as:

• Outsourcing machining to another workshop
• Hiring temporary equipment
• Paying overtime to catch up

Breakdown of computers / electronic equipment

CNC controls, PLCs and drives can be expensive and sensitive to power quality. If your workshop relies heavily on electronics, make sure electronic breakdown is clearly included.

Inspection and statutory engineering

Some equipment may require statutory inspection (for example certain pressure systems or lifting equipment). Insurers may offer inspection services or require evidence that inspections are up to date.

Risk management: how to reduce claims and premiums

Insurers like engineering businesses that can demonstrate control. Practical steps include:

Planned preventative maintenance

• Keep maintenance logs for each critical machine
• Follow manufacturer service intervals
• Record oil changes, filter changes and calibration

Power quality and surge protection

• Use surge protection and consider UPS for sensitive controls
• Document any electrical upgrades
• Keep distribution boards and panels in good condition

Compressed air management

• Drain receivers and manage moisture
• Service dryers and filters
• Monitor temperature and ventilation around compressors

Operator training and procedures

• Document training for CNC operators and forklift drivers
• Use start-up and shut-down checklists
• Implement safe tooling and workholding standards

Housekeeping and fire prevention

Even though fire is usually a property policy issue, good housekeeping reduces overall risk:

• Control dust and swarf build-up
• Store flammables correctly
• Keep extraction systems maintained

Claims: what to do when a machine breaks down

When something fails, speed and documentation matter.

• Make the area safe and prevent further damage
• Take photos and note what happened, including error codes
• Keep failed parts where possible
• Contact your insurer/broker promptly
• Use approved repairers if required
• Track downtime and extra costs (outsourcing, overtime)

If you have BI cover, keep a clear record of lost orders, delayed jobs, and increased costs of working.

How to get a quote (and what information you’ll need)

To arrange plant & machinery insurance for an engineering workshop, you’ll typically be asked for:

• Business description and processes (machining, fabrication, assembly)
• List of machinery, values and ages
• Maintenance arrangements (in-house or contracted)
• Any statutory inspection records (where relevant)
• Claims history
• Security and premises details
• Whether you need breakdown BI cover and desired indemnity period

If you can provide a simple asset register and basic maintenance evidence, the process is usually much smoother.

Common mistakes to avoid

• Insuring only for fire/theft and assuming breakdown is included
• Underinsuring high-value CNC machines
• Forgetting the compressor and extraction systems (often critical)
• No business interruption cover for key equipment
• Poor documentation of maintenance and inspections

Quick checklist for engineering workshop owners

• List your critical machines and their replacement values
• Decide whether you need specified items or blanket cover
• Add breakdown business interruption for single points of failure
• Check exclusions around wear and tear and maintenance
• Keep maintenance logs and inspection records up to date

Talk to a specialist broker

Plant & machinery insurance is most effective when it’s built around how your workshop actually operates.

If you’d like, we can review your key machines, your biggest downtime risks, and the cover options that make sense for your budget. Call 0330 127 2333 or request a quote via Insure24.