Retainer Agreements For UK Interior Designers

Maya runs a small interior design studio in Manchester. A client loves her concept presentation, asks her to start sourcing furniture, then goes quiet for three weeks - right when Maya has already reserved supplier stock, spent hours on revisions and turned away other work.

If that sounds familiar, you're not alone. Interior design projects often move in phases, and a lot of the value sits in the thinking, sourcing and coordination that happens before anything is installed.

A clear retainer agreement helps you get paid as the project progresses, set boundaries around approvals and changes, and avoid awkward conversations about mark-ups, contractors and who owns the design work.

What Is An Interior Design Retainer Agreement?

An interior design retainer agreement is a client contract that sets out how your design services will be delivered and paid for, usually through an upfront retainer, monthly retainer or staged project fees.

For an interior designer, this can work better than a single invoice at the end because your work often happens over several phases. You might be doing site meetings, concept development, product sourcing, trade ordering, contractor liaison and styling over weeks or months.

Your retainer agreement can cover things like:

• the design brief and project scope
• what is included in each design phase or statement of work
• your fees, retainers, deposits and staged payments
• how many revisions are included
• how client approvals work
• whether you charge procurement mark-ups or keep trade discounts
• who contracts with suppliers and contractors, and whether a supplier agreement is needed
• ownership and use of your design concepts, drawings and mood boards
• what happens if the client pauses, cancels or changes the project

The word retainer can mean different things in practice, so your contract should be precise. Is the retainer an advance payment for work you'll perform? Is it a monthly access fee that reserves your time? Is it non-refundable once paid because it covers availability and initial work? The answer should be written clearly, especially where your client is a homeowner rather than another business.

Do UK Interior Designers Need A Written Client Contract?

Yes, you should have a written client contract for design work because it makes your fees, scope and responsibilities much easier to prove if something changes or goes wrong.

A verbal agreement can sometimes be legally binding, but it rarely gives you enough detail for an interior design project. Without a written agreement, you may struggle to recover unpaid invoices, charge for extra revisions, or show that the client approved a product before you ordered it.

Your contract doesn't need to be full of legal jargon. In fact, it works best when it's written in plain English and reflects how your studio actually operates.

If Your Client Is A Homeowner

Many UK interior designers work with homeowners, which means consumer law can apply. Under the Consumer Rights Act 2015, your services must be carried out with reasonable care and skill. If you haven't agreed a price or timeframe clearly, the law can imply that the price must be reasonable and the work must be done within a reasonable time.

You also need to be careful with terms that are too one-sided. For example, a clause saying the client loses a large payment no matter what happens may be challenged as unfair if it goes beyond your real costs and the value of work already done.

If you sign up clients online, over the phone or in their home, the Consumer Contracts Regulations 2013 may also give them a 14-day cooling-off period. If you want to start work during that period, your process should get the client's express request to begin and explain that they may need to pay for work already carried out if they later cancel.

If Your Client Is A Business

If you're designing an office, clinic, cafe, retail store or serviced apartment for a business client, you have more flexibility to agree commercial terms. You should still be clear about payment dates, interest on late payments and what happens if the client delays approvals.

For business-to-business debts, the Late Payment of Commercial Debts (Interest) Act 1998 can allow statutory interest at 8% above the Bank of England base rate, plus fixed compensation, unless your contract sets a different substantial remedy. Even so, it's better to have your own payment terms written into the agreement so the process is clear from day one.

How Should Your Retainer And Staged Payments Work?

It depends on your pricing model, but your agreement should link payments to clear milestones, dates or blocks of work so the client knows exactly what they're paying for.

Interior designers commonly use one or more of these structures:

• Initial design retainer: an upfront payment that secures your time and covers early work such as brief review, site meetings and concept development.
• Fixed phase fees: separate fees for concept design, detailed design, procurement and installation support.
• Monthly retainer: a recurring amount for ongoing support, project coordination or sourcing over a set period.
• Hourly fees: useful for ad hoc advice, extra revisions, site visits or work outside the agreed scope.
• Procurement fee or mark-up: a percentage or margin charged on goods you source or order for the project.

For example, you might charge £1,500 to start a living room project, then £2,000 when the concept is approved, then a procurement fee once the client approves the final furniture schedule. That's much easier to manage than waiting until every sofa, lamp and cushion has arrived before issuing your main invoice.

Your payment clause should deal with:

• when each payment is due
• whether amounts are inclusive or exclusive of VAT, if you are VAT registered
• whether late payment pauses your work
• whether procurement orders require full payment in advance
• what happens to unused retainer amounts
• how expenses, travel, samples and courier fees are handled
• how long quotes remain valid, especially where supplier pricing changes

Try not to rely on the phrase non-refundable without explaining why. A better approach is to say what the upfront fee covers, when it's earned, and what refund position applies if the client cancels before you start or after you have completed a phase.

What Should Your Design Phases And Client Approvals Cover?

Your agreement should set out each design phase and require written client approval before you move to the next stage or commit the client to costs.

This matters because design projects often grow naturally. A client starts with one bedroom, then asks about the hallway, then wants you to source artwork, then changes the colour palette after you have finalised the supplier list. Those changes might be perfectly fine, but they shouldn't quietly become unpaid work.

Common Design Phases

Your design services agreement might break the project into phases such as:

• Brief and discovery: site visit, measurements, lifestyle needs, budget discussion and project goals.
• Concept design: mood boards, inspiration imagery, broad layouts, colour direction and initial materials.
• Detailed design: furniture plans, lighting suggestions, finishes, specifications and product schedules.
• Procurement support: supplier quotes, ordering, tracking, delivery coordination and substitutions.
• Installation and styling: site attendance, placement, styling, snagging support and final handover.

You can then say what is included in each phase and what is excluded. For instance, your concept fee may include one presentation and two rounds of revisions, but not technical architectural drawings, structural advice, planning applications or building control submissions.

Approvals And Variations

Approvals should be practical. Email approval, signed schedules or approval through your project management software can all work if your agreement says they count.

Your contract should also say that once a client approves an item, they're responsible for the cost unless the supplier accepts a return or cancellation. This is especially useful for made-to-order products, bespoke furniture, imported items and sale stock.

A good variation process can be simple:

1. The client asks for extra work or a change.
2. You confirm the impact on fees, timing and any supplier costs.
3. The client approves in writing.
4. You start the extra work or place the order.

This doesn't need to feel heavy. It just keeps everyone clear on budget and expectations.

How Do Product Sourcing, Procurement Mark-Ups And Returns Work?

You can charge for product sourcing and procurement mark-ups, but your agreement should explain how those charges work before the client commits to the project.

Product sourcing is one of the areas where misunderstandings come up quickly. A client may assume you're passing on all trade discounts. You may assume your margin is part of how you get paid for supplier relationships, ordering time and risk. Neither position is unusual, but silence can cause friction.

Your interior design terms and conditions should explain:

• whether you charge a procurement fee, product mark-up or both
• whether trade discounts are passed on, shared or retained by your business
• whether the client can buy recommended items directly
• whether you guarantee availability, pricing or delivery dates from suppliers
• who deals with damaged, faulty or delayed goods
• who pays storage, re-delivery, cancellation or restocking fees

Are You Reselling Or Acting As An Agent?

Your legal position can change depending on whether you buy products and resell them to the client, or whether you simply help the client buy directly from the supplier.

If you resell goods, your business may be responsible to the client for consumer rights relating to those goods, such as goods being as described, of satisfactory quality and fit for purpose under the Consumer Rights Act 2015. You'll then need your own process for supplier warranties, returns and faulty goods.

If you act as an agent, the client may contract directly with the supplier, with you arranging or coordinating the order. In that case, your agreement should make it clear that supplier terms apply and that you aren't responsible for the supplier's stock levels, delivery delays or manufacturing faults.

There's no single best model. The right structure depends on your pricing, supplier relationships and how much control you want over the procurement process.

Who Deals With Contractors, Delays And Installation Issues?

It depends on who appoints the contractor and what role you have agreed to take, so your contract should draw a clear line between design services and construction or installation work.

Interior designers are often asked to recommend decorators, specialist design subconsultants, joiners, electricians, builders, curtain makers or installers. That's helpful for the client, but it can blur responsibility if the contractor makes a mistake or the project runs late.

Your agreement should say whether:

• the client contracts directly with contractors and trades
• you're only recommending contractors, not guaranteeing their work
• you'll coordinate trades under your service agreement
• you have authority to give instructions on the client's behalf
• you charge additional fees for site visits, project coordination or installation days
• you're responsible for checking dimensions, access, parking, lifts and delivery conditions

If building works are involved, the Construction (Design and Management) Regulations 2015 may also be relevant. These rules can apply to domestic and commercial projects and may place duties on designers, contractors and principal contractors around health and safety. If your role moves beyond interiors into construction coordination, drawings for works or contractor management, get tailored advice about how to structure the project.

Your contract should also deal with delay. For example, you might say you aren't responsible for delays caused by late client approvals, supplier stock issues, contractor availability, building works, access problems or events outside your control. You can also say that your own deadlines move if the client pauses the project or doesn't provide information on time.

Who Owns Your Interior Design Concepts And Project Photos?

Usually, you own the copyright in your original design materials unless you agree to transfer it, but your client should receive a clear licence to use the materials for their project once they have paid you.

Under the Copyright, Designs and Patents Act 1988, copyright can protect original artistic works such as drawings, plans, sketches, presentation documents and some visual materials. General ideas, styles and trends aren't protected in the same way. For example, a warm minimalist kitchen concept isn't owned by one designer, but your original drawings and presentation boards may be protected.

Your agreement should say:

• you retain ownership of your design concepts, drawings, schedules and presentation materials
• the client can use the final approved materials for the agreed project once invoices are paid
• the client can't reuse your designs for another property or give them to another designer without permission
• you can withhold final files while invoices remain unpaid
• whether you can use project images in your portfolio, website and social media

Project photos need a little care. If the photos show a private home, family members, valuable possessions or anything that identifies the client, get written permission before publishing them. If you collect or use personal data, such as client contact details, home addresses and identifiable images, your business should also handle that data in line with the UK GDPR and the Data Protection Act 2018.

Confidentiality can also matter. High-profile clients, commercial fit-outs and pre-launch hospitality projects may expect discretion around budgets, layouts, suppliers and opening plans. A short confidentiality clause can prevent a lot of tension later.

Key Takeaways

• An interior design retainer agreement helps you get paid throughout the project, not just at the end.
• Your contract should break the work into clear phases, with written approvals before you order products or move to the next stage.
• Procurement mark-ups, trade discounts, supplier delays and returns should be explained upfront so clients know how your fees work.
• Be clear about whether you're responsible for contractors or simply recommending them to the client.
• Your design concepts, drawings and presentation materials should be protected, with a clear licence for the client to use them for the agreed project.
• Consumer law, cancellation rights, data protection and construction duties can all affect interior design projects, depending on how you work.

If you'd like help with your interior design client contracts, retainer terms, procurement clauses or IP protections, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.