Invoice Format for Interior Designers in India (With Bill Format)
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An interior designer's work stretches over months and money moves in stages: a design fee at the start, advances for materials and contractors, progress payments and a final settlement. Without a clear invoice structure, clients argue about whether the design fee was included in the quotation, who pays for a change of plan midway and what the final balance is. A thoughtful invoice format for an interior designer keeps each stage of the project visible and agreed.
This page provides a bill format for interior designer practices and studios in India. It shows how to separate design fees from execution costs, how to bill by milestone, how to record variation orders and how to treat vendor costs that you pay on the client's behalf. A filled-in sample and free PDF, Excel and Word downloads are included.
Download the interior designer invoice template
Each file has design, render, supervision and project-management lines plus a milestone and advance row, so you can bill a project in stages.
Prefer not to fill it in by hand? The button above opens Invoro with these line items already added to a draft invoice — you only change the client name and your own rates.
Line items to put on a interior designer invoice
Interior projects are billed in layers: your design fee, your supervision and management fee, and the costs of executing the work. Keep these layers on separate lines or separate invoices so the client always knows what is your fee and what is a pass-through.
| Line item | Unit | Illustrative rate |
|---|---|---|
| Design consultation and concept development | per project | ₹25,000 |
| 2D layout and working drawings | per room | ₹8,000 |
| 3D renders (two revisions included) | per room | ₹6,000 |
| Site supervision visit | per visit | ₹2,500 |
| Material and vendor coordination | per month | ₹15,000 |
| Variation order: additional wardrobe design | per item | ₹7,000 |
Sample interior designer invoice, filled in
The first milestone invoice of a two-bedroom flat project: the concept, three rooms of renders and four site visits, after an advance on signing.
502 Orchid Plaza, Bengaluru 560038 | Phone 98450 77889
Date: 12 Oct 2026
Due: Within 7 days
Bill to: Karthik and Divya Rao, 2BHK Flat 1204, Lakeview Residency
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Design consultation and concept (Milestone 1) | 1 | ₹25,000 | ₹25,000 |
| 3D renders, living, master bedroom, kitchen | 3 | ₹6,000 | ₹18,000 |
| Site supervision visits | 4 | ₹2,500 | ₹10,000 |
| Total | ₹53,000 | ||
| Advance received | − ₹25,000 | ||
| Balance due | ₹28,000 | ||
Milestone 2 is due on approval of working drawings. Two revisions per render are included; further revisions are charged separately. Vendor costs are billed at actuals.
All names and amounts in this sample are made up for illustration.
Design fee versus execution cost
Decide whether you charge for design as a fixed fee, as an amount per square foot, or as a percentage of the project cost, and say which on the first invoice. Execution costs, meaning carpentry, civil work, electrical, paint, furniture and fittings, are different: they are normally either bought by the client from vendors you recommend, or billed through you with or without a margin. Mixing the two on a single total makes your fee look inflated and makes vendor costs impossible to audit. Keep design, supervision and execution on separate lines.
Milestone billing and the payment schedule
Spread the design fee over milestones that mark real progress, for example: an advance on signing, a payment when the concept and layout are approved, a payment when working drawings and 3D views are delivered and a final payment at handover. The exact split is up to you, though many designers weight the early stages so that the work already done is covered if a project stalls. Write the schedule on your proposal, then show each milestone on its own invoice with the stage name and the reference to the proposal.
Renders, drawings and site visits
Charge for deliverables you can count: layouts, working drawings, 3D renders by room, material boards and site visits. A line such as “3D renders, living room, two revisions included” makes the scope clear and gives you a basis for charging for further revisions. For supervision, bill by the visit or by the month, and say how many visits per week are included.
Variation orders and scope changes
Scope changes are the main source of disputes in interior work. When a client adds a wardrobe, moves a wall or changes a material, write a short variation note with the extra cost and the effect on the timeline, get a written approval by message or email, and add it as a separate line on the next invoice marked as a variation. The final invoice then reconciles easily against the original proposal and the approved variations.
Pass-through costs and vendor payments
If you buy materials or pay contractors on the client's behalf, keep the vendor bills and show these costs as pass-through lines with the vendor name, or include them as annexures. State on the proposal whether you add a service charge or commission on these purchases, and show it as its own line. Clients are far more comfortable with an openly stated percentage than with a surprise when they compare prices elsewhere.
Tax and TDS on interior design services
If you are not registered for GST you cannot charge it; if you are, confirm with your CA how design fees and execution work are to be invoiced and at what rate, because mixed supplies are treated carefully. When your client is a company or a firm, the payer may deduct TDS on professional fees, and sometimes on contract payments, and will issue a certificate. Keep each certificate with the invoice it relates to and check it against your tax statement at year end. Rates and thresholds are updated from time to time, so confirm the current position.
Common mistakes on interior design bills
- Design fee and execution cost combined into one number.
- No milestone names, so clients cannot see what each payment is for.
- Scope changes agreed verbally and never invoiced.
- Vendor costs paid by you and not itemised.
- No revision limit on renders.
- No written payment schedule on the proposal.
Creating interior design invoices online in Invoro
Create the client and the first milestone invoice from the table above, then add later milestones as the project progresses. Each payment is recorded against the invoice, so the balance is always visible, and you can send a reminder when a milestone is overdue. The “Create this invoice online” button opens a draft with these lines.
Frequently asked questions
How should an interior designer invoice a project?
Separate the design fee, the supervision or management fee and the execution costs. Bill the design fee in milestones tied to approvals and bill execution costs against approved quotations or vendor bills.
How do I charge for changes to the design?
Write a short variation note with the extra cost, get the client's written approval and add it as its own line on the next invoice.
Should I show vendor costs on my invoice?
Yes. Show materials and contractor payments you make on the client's behalf as pass-through lines with the vendor name, and show any commission separately.
How much advance should a designer ask for?
There is no fixed figure. Many designers take a meaningful advance on signing, enough to cover the early design work, and tie later payments to approvals. State the schedule on the proposal.
Does an interior designer charge GST?
Only when registered. Registered designers should confirm with their CA how design and execution work are invoiced, as the treatment can differ.