Cut PO Admin with 210+ Brands: Purchase Orders for Interior Designers

An interior design purchase order is a written commitment to buy specific goods or services from a supplier at an agreed price, on agreed terms. Used consistently, it creates an auditable committed cost against the project budget and gives you accurate records for delivery, invoicing and client billing. If you are not yet using one, the checklist below will get a workable system running this week.

TL;DR:

• Use purchase orders for all significant projects to ensure accurate record-keeping, budget control, and a clear audit trail for procurement.
• Implement a standardized PO template with detailed item specifications, pricing, delivery instructions, and version control to prevent disputes.
• Adopt dedicated PO software with approval workflows and live budget visibility once managing multiple projects, replacing spreadsheets for scale.
• Reconcile open POs weekly against the project budget to catch overspending early and treat any changes as new approval requirements.
• Clearly define and document your procurement role as principal or agent before placing orders to avoid legal exposure and maintain transparency with discounts.

Table of Contents

• Where a purchase order fits in procure to pay
• Template checklist: every field to include on a purchase order
• Spreadsheets versus purchase order software
• Setting up a purchase order workflow this week
• VAT records and the agent versus principal question
• A practical example: reducing purchase order admin through a trade showroom
• Three rules that protect margin and client trust
• How Faura supports designers with trade accounts and procurement
• Sources
• FAQ

Where a purchase order fits in procure to pay

A purchase order sits early in what accountants call the procure-to-pay sequence: a design decision is specified, a PO is raised and approved, goods or services are delivered, and a supplier invoice arrives for payment. Each stage is a control point. Skipping the PO stage means a studio has no record of what was committed to before the invoice lands, which makes budget tracking reactive rather than proactive.

It’s worth being precise about what a PO does and does not do. Procure-to-pay guidance from HMRC treats POs as part of the audit trail supporting a purchase, but they do not replace the supplier VAT invoice required to reclaim VAT. You still need that invoice on file.

Studios handling more than a handful of suppliers per project, or anything above a modest order value, should make POs mandatory rather than optional. The discipline pays off fastest on multi-supplier FF&E schemes, where a missing record is hardest to reconstruct later.

Template checklist: every field to include on a purchase order

A usable PO template does not need to be complicated. It needs to be complete enough that a supplier, a bookkeeper and a client could all read it and understand exactly what was ordered and on what terms.

Start with identification and contact fields:

• Project name, client name and project reference number
• PO number, issue date and studio contact
• Supplier name, contact details and account or trade reference

Then specify the item itself, in enough detail that there is no room for substitution:

• SKU or supplier product code, finish, fabric or colour code
• Dimensions, quantity and lead time
• Any bespoke specification notes, including fabric cuttings or finish boards referenced

Pricing and delivery fields close the loop:

1. Unit price, trade discount applied, and total before tax
2. VAT treatment and rate applied
3. Deposit required, balance due and payment terms
4. Delivery address, installation requirements and any white-glove handling notes
5. Approver name and signature, with a change-order reference field left blank for later use

Keep a version number on every PO. When a specification changes, the correct move is a new version with a note explaining what changed and why, not an edited copy of the original. That single habit prevents most disputes about what was actually agreed.

Spreadsheets versus purchase order software

A spreadsheet is a reasonable starting point for a sole trader running two or three live projects. It costs nothing extra, it is flexible, and everyone on a small team already knows how to use it. The risk appears at scale: version control breaks down when multiple people edit the same file, there is no built-in approval step, and reconciling a spreadsheet against actual spend is manual work that gets skipped when a studio is busy.

Dedicated PO software earns its keep once you are managing several concurrent projects or a supplier list that runs into double figures. Look for:

• PO templates with automated numbering, so no two orders share a reference
• Multi-level approval workflows tied to order value
• The ability to convert a PO directly into a bill once goods arrive
• Live visibility of open POs against the project budget

Both Xero’s purchase order tools and Sage’s purchase order features offer templates, approval routing and the bill-conversion step as standard, which removes a large share of manual re-entry and the errors that come with it. Design-specific project software such as Pipeline builds order tracking into the same interface as scheme boards and budgets, which suits studios that want procurement and design work in one place.

Pro Tip: Set your software to flag any PO that pushes a budget line over 90% committed, so you catch overspend before the invoice arrives, not after.

Setting up a purchase order workflow this week

A workflow does not need to be elaborate to work. It needs clear ownership and a rule for every decision point that currently gets made on the fly.

1. Set an approval threshold: orders under a fixed value can be raised and approved by one person, anything above it needs sign-off from the project lead or studio principal.
2. Assign roles explicitly: who can raise a PO, who approves it, and who checks it against the budget before it goes to the supplier.
3. Standardise templates by category. FF&E, joinery and soft furnishings each carry different fields, so build one template per category rather than forcing every order through a generic form.
4. Reconcile open POs against the project budget weekly. This is the single habit that catches cost creep before it becomes a client conversation you did not plan for.
5. Treat any change in price, quantity or lead time as a change order requiring fresh approval, never a quiet edit to the original PO.

Write these rules down, even briefly, and share them with everyone who touches procurement on a project. Most PO disputes trace back to an undocumented assumption about who was allowed to approve what.

VAT records and the agent versus principal question

Two legal points catch designers out more than any other part of procurement: VAT recordkeeping and the agent versus principal distinction.

On VAT, the rule is straightforward. A PO supports your audit trail, but GOV.UK guidance on keeping VAT records is explicit that you must retain copies of purchase invoices to reclaim VAT, not just the order that preceded them. A PO without a matching supplier VAT invoice on file will not support a VAT reclaim.

The agent versus principal distinction determines who carries the risk on a purchase. As a principal, you buy the goods yourself and resell them to the client, taking the commercial upside of any trade discount but carrying full liability for warranties, returns and cashflow. As an agent, you purchase on the client’s behalf, which limits your liability but requires a segregated client account and full transparency on any discount received.

The BIID’s professional practice guidance on FF&E recommends stating this role explicitly in your terms of engagement, because ambiguity here is what tends to trigger disputes over discounts and client funds later in a project.

Undisclosed trade discounts are a recognised source of legal exposure when a designer acts as agent, according to FF&E procurement guidance covering client fund handling. Decide your position before the first PO goes out, not after a client asks where a discount went.

A practical example: reducing purchase order admin through a trade showroom

Consolidating suppliers through a single procurement route cuts the number of purchase orders a studio has to raise and track. A trade showroom and design residency works with independent designers on exactly this basis: a curated product library covering more than 210 brands, a trade account with agreed procurement terms, and specification support that turns a scheme into a single consolidated order rather than a dozen separate ones.

For a designer sourcing lighting, furniture and finishes for one room, that consolidation means:

• Fewer suppliers to raise individual POs against
• One delivery coordination point instead of several
• Specification support that catches errors before an order is placed

A showroom or procurement partner is worth considering whenever a project’s supplier list is growing faster than your admin capacity can absorb it.

Three rules that protect margin and client trust

Decide your procurement role, principal or agent, before the first order goes out, and put it in writing. Retrofitting that decision after a client has queried a discount is far harder than stating it upfront.

Reconcile open purchase orders against budget weekly, not monthly. A weekly check catches a pricing error or a scope change while it is still cheap to fix.

On discounts, disclose by default. Whether you keep the margin as principal or pass it through as agent, the client should never have to ask where a trade discount went.

— Eugene

How Faura supports designers with trade accounts and procurement

Faura gives independent designers a working London base built around a trade account, specification support and consolidated procurement, so fewer purchase orders and fewer supplier calls are needed per scheme.

• A curated product library across more than 210 brands, accessed through one trade relationship
• Client hosting at the showroom for presenting schemes without juggling multiple appointments
• Specification support that reduces the back and forth typically spent chasing finishes and lead times

Find out more about trade accounts and specification support or explore the showroom in Westminster.

Sources

• Gov
• Professional Practice Series: FF&E | British Institute of Interior Design
• Create purchase orders - Xero UK
• Purchase orders - Sage UK

FAQ

What is the 3-5-7 rule in interior design?

The 3-5 rule is a styling guideline for arranging objects in groups of three or five items, based on the idea that odd numbers read as more visually balanced. It applies to decorative arrangement rather than to procurement or purchase order practice.

What is the 15% rule in interior design?

Definitions vary between practitioners, and it is not a fixed industry standard.

What is the 70/30 rule in interior design?

The 70/30 rule suggests splitting a room’s palette or styling roughly 70% in a dominant tone or style and 30% in a contrasting accent. It is a styling convention rather than a procurement or budgeting rule.

What are the four main types of purchase orders?

The commonly recognised types are standard purchase orders for one-off orders, planned purchase orders for agreed future deliveries, blanket purchase orders covering repeat orders from one supplier over time, and contract purchase orders that formalise longer-term supplier agreements. Interior design studios most often use standard and blanket POs, the latter suiting ongoing relationships with a regular supplier.

Does a purchase order replace a VAT invoice?

No. A purchase order supports your procure-to-pay audit trail, but you still need the supplier’s VAT invoice on file to reclaim VAT under GOV.UK recordkeeping rules.