If your business sells a product and does something alongside it (like installation, setup, training, servicing, customisation, repairs, or ongoing support), you're not alone.
This "hybrid" model is now the norm in the UK - from ecommerce brands offering paid fitting, to trades businesses supplying materials, to tech companies shipping hardware with a monthly support plan.
But there's a catch: when you sell both goods and services, using the wrong contract (or stitching two templates together) can leave gaps that cost you time, money, and reputation later.
Below, we'll walk through how to choose the right contract structure, what to include, and where businesses commonly get caught out - so you can be protected from day one.
Why Selling Goods And Services Changes Your Legal Risk
When you only sell goods, your key legal risks usually revolve around:
- product quality and faults
- delivery and title (who owns the goods, and when)
- returns, refunds, and warranty expectations
- stock issues and substitutions
When you only sell services, your risks often focus on:
- scope creep (the work expanding beyond what you priced)
- timeframes and delays
- customer approvals and sign-off
- limitations on liability for business loss
- termination and cancellation fees
When you sell both together, those risks combine - and the "grey areas" multiply.
For example, if you sell a bathroom suite and provide installation, and the customer complains it leaks, the dispute can quickly turn into:
- Is it a faulty product issue or poor installation?
- Who pays for removal and re-installation?
- Can the customer reject the whole deal, or only part of it?
- What if the customer supplied some of the materials themselves?
This is exactly why a single, properly structured contract (or a coordinated set of documents) matters.
Are You Selling "Goods", "Services", Or A Mixed Supply?
In plain English:
- Goods are physical items you supply (products, materials, parts, equipment).
- Services are the work you perform (installation, repairs, consulting, design, training, maintenance).
- Mixed supply is where the transaction includes both, and the customer experiences it as one deal (even if you invoice separately).
Why does classification matter? Because different legal rules and implied rights can apply depending on what you're supplying, who your customer is, and how your offer is described.
B2C Vs B2B Makes A Big Difference
The fastest way to get clarity is to start with the customer type. Consumer-facing contracts usually have stricter rules, and you can't simply "contract out" of certain consumer protections.
If you're not sure where your deal sits, it helps to ground your approach in B2B vs B2C contracts early - because the same clause can be fair and enforceable in B2B, but problematic in B2C.
What Customers Think They're Buying Often Drives Disputes
Even if your invoices split out "product" and "labour", customers often see the purchase as one package. If something goes wrong, they'll push for one "fix".
This is where your wording matters:
- If your website markets a "fully installed package", expect customers to treat it as one bundled supply.
- If you clearly separate goods supplied from services provided (and document customer responsibilities), it's easier to manage what you're responsible for.
In 2026, this matters more than ever because customers are used to seamless "end-to-end" offers - and complaints often start with "I bought a solution, not a box".
Which Contract Should You Use If You Sell Both?
There isn't one universal answer - but there is a right structure depending on how you deliver your offer.
Here are the most common approaches we see in UK small businesses, and when each one works best.
Option 1: One Combined Agreement (Best For Bundles And Projects)
If you're providing goods and services as one package (for one price or one project outcome), a combined agreement is usually the cleanest option.
This is especially true where:
- your service depends on the goods (e.g. supply + installation)
- the goods are customised or configured as part of your service
- you want one set of rules for payment, delays, liability, and disputes
In practice, this is often handled through a Goods & Services Agreement that clearly separates product terms from service terms, but still keeps the deal in one document.
Option 2: Separate Documents (Best For Modular Offers)
If customers can buy your goods without your services (or vice versa), separate documents can make sense - as long as they are consistent.
For example:
- you sell equipment online, and offer optional installation as an add-on
- you sell kits and also offer training sessions
- you supply parts, but repairs are a separate booking
The key is to avoid contradictions (like different liability caps, different cancellation rules, or mismatched payment terms).
Option 3: Online Store Terms + A Job/Service Agreement (Best For Ecommerce + On-Site Work)
If you take orders through an online store, you'll often need strong E-Commerce Terms & Conditions for the product sale side, and then separate service terms for the on-site work.
This approach can work well, but only if the customer understands:
- what is covered by the online purchase
- what is covered by the service booking
- how issues are handled when a problem involves both
If you don't join the dots clearly, you can end up with a customer arguing that your "online store terms" don't apply to installation - or that your "service terms" don't apply to the supplied goods.
Clauses You Need When Goods And Services Are Sold Together
If you take nothing else from this article, take this: mixed supply contracts fail when they don't say who is responsible for what, and what happens when something goes wrong.
Here are the clauses that typically matter most.
1) Clear Scope: What You're Supplying And What You're Not
Your contract should spell out:
- the goods (including model, specs, quantity, and any exclusions)
- the services (including exactly what tasks are included)
- what is expressly not included (common source of disputes)
This is also where you manage expectations around "minor extras" that can blow out jobs - like disposal, site preparation, making good, patching/painting, or upgrades.
2) Delivery, Installation, And Risk Transfer
For goods, you need to be clear on:
- delivery dates (and whether they are estimates)
- what happens if access isn't available
- who bears risk of loss/damage and when
- who owns the goods and when title transfers (especially if payment is staged)
For services, you should cover:
- who is responsible for providing a safe and suitable site
- customer obligations (access, utilities, approvals)
- how delays caused by the customer are handled
3) Acceptance Testing And Sign-Off (So You Can Actually Close The Job)
If you supply something that must be tested (equipment, systems, installed goods), an acceptance/sign-off step can prevent "it's not working" disputes months later.
Even a simple process helps, such as:
- installation completed
- basic testing demonstrated
- customer confirms acceptance (in writing/email)
This doesn't remove your legal obligations if something genuinely fails - but it does reduce arguments about whether the job was completed properly at the time.
4) Faults, Remedies, And What Happens If It's Both A Product And Service Issue
Mixed supply disputes often come down to remedies. Your contract should explain the pathway:
- how customers report defects/issues
- timeframes for inspection
- whether you will repair, replace, re-perform services, or refund
- what you need from the customer to investigate (photos, access, stopping use)
If you deal with consumer sales, your approach must align with the Consumer Rights Act 2015 - especially around remedies for faulty goods.
Practically, you also want to avoid a "blame loop" between product supplier and installer. If you outsource installation, or you're installing goods sourced from a third party, it's worth getting legal advice on how your customer-facing remedies align with your supplier agreements.
5) Returns, Refunds, And Practical Timing
If you sell goods, customers will ask about returns. If you sell services, they'll ask about cancellations. If you sell both, they'll ask for refunds when the overall experience doesn't meet expectations.
This is where you want consistency between:
- your contract terms
- your customer support scripts
- your operational process
For online retail businesses, a written returns policy helps set expectations about change-of-mind returns, faulty items, restocking, and return shipping.
Also, customers regularly ask "how long will my refund take?" - and your terms should be operationally realistic while still fair. It's worth pressure-testing your process against refund timeframes so your team doesn't promise something you can't deliver.
6) Liability (Because A Service Mistake Can Create Big Losses)
When goods and services are bundled, liability risk increases because the service element can cause property damage, downtime, or cascading losses.
A good contract typically addresses:
- what types of loss are excluded (where appropriate)
- the liability cap (often tied to fees paid)
- who is responsible for third-party costs (like call-out fees or specialist reports)
- insurance obligations (yours and/or the customer's)
This is one of those areas where DIY templates can be risky - liability clauses need to match your real-world risk profile, customer type, and industry.
7) Payment Structure: Deposits, Milestones, And Final Payment
Most mixed supply businesses need something more nuanced than "pay in 30 days".
Common structures include:
- deposit + balance (often used where goods must be ordered in)
- milestones (e.g. 40% order, 40% delivery, 20% completion)
- progress claims tied to stages of work
If you supply goods that you can't easily resell (custom orders), your contract should say what happens if the customer cancels after you've committed costs.
Common Mixed-Supply Scenarios (And How To Contract For Them)
Sometimes it's easier to spot what you need when you look at real examples.
Scenario A: Ecommerce Brand + Paid Assembly/Installation
If customers can buy the product without installation, you'll typically need:
- online store terms covering the goods sale
- service terms covering the installation booking
- a clear statement of what happens if the customer cancels the installation but keeps the goods (and vice versa)
Be especially clear about damage risk at the customer's premises and customer obligations (access, safe environment, adequate space).
Scenario B: Trades Business Supplying Materials As Part Of The Quote
This is where disputes about delays and substitutions often arise.
Your contract should cover:
- what happens if a specified product is unavailable (substitutions and approvals)
- lead times and delays outside your control
- variations (how changes are quoted and approved)
If you don't manage variations properly, you can end up doing extra work without being paid - and that's a headache you can avoid with the right wording from the start.
Scenario C: "Product + Ongoing Support" Packages
If your "service" is ongoing (maintenance, monitoring, support), make sure your contract addresses:
- support hours and response times
- what counts as included support vs chargeable work
- term length and renewal rules
- termination rights and handover obligations
Even if you're not a software company, recurring support models are essentially subscription-style services, so clear term and exit rules are crucial.
Scenario D: Customer Supplies Some Materials (And You Supply The Rest)
This is a classic "blame risk" scenario: if something fails, the question becomes whether the problem came from the customer-supplied materials or your workmanship.
To protect yourself, your contract should clearly state:
- what customer-supplied items you will and won't install
- whether you accept responsibility for compatibility
- how defects in customer-supplied goods affect warranties and remedies
Key Takeaways
- Selling goods and services together increases your legal risk because disputes often sit in the "grey area" between product fault and service performance.
- The right contract structure depends on how you sell: one bundled package, modular add-ons, or online store + separate service bookings.
- Your agreement should clearly separate and define the goods, the services, and the customer's obligations - this is how you prevent scope creep and finger-pointing later.
- Mixed-supply contracts should address delivery, installation, acceptance/sign-off, remedies for faults, returns/refunds, payment milestones, and liability caps.
- If you sell to consumers, your terms and processes need to align with the Consumer Rights Act 2015 and practical expectations around refunds and complaints handling.
- Generic templates often fail for mixed supply deals because the "handover points" (risk, acceptance, remedies) need to match how your business actually operates.
If you'd like help getting the right contract in place for a goods + services offer, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.
