Interior Design Fees in India: Per Sq Ft, Lump Sum or Percentage

Few questions cause as much confusion for Indian homeowners as "what does an interior designer charge?" One firm quotes a rate per square foot, another a single lump sum, a third a percentage of the project cost, and a fourth says design is free if they also execute the work. The numbers look impossible to compare, and many clients end up choosing on the headline figure — only to discover months later that site visits, revisions, 3D views or working drawings were never included.

The model is only a way of calculating the fee. What matters is what the fee buys: how many drawings, how many revisions, how many site visits, who is responsible for quality on site, and what happens if the scope changes. Two quotes that differ by half can describe completely different services, and two quotes that look identical can carry very different risks. This site's earlier guide on how interior designers charge introduced the three models; this article goes further, with typical market ranges, worked examples on real Surat budgets, the effect of area basis and GST, payment schedules and the clauses that prevent disputes.

A note on the figures. Fees in India vary widely by city, firm, experience and scope. The ranges here are typical market practice and illustrative examples, indicative for October 2026 — they are not the fees of any particular firm and should not be read as a standard. Always ask for a written, itemised proposal. This is general information, not legal or financial advice.

How design fees developed in India

For much of the twentieth century, interior work in Indian homes was done by carpenters and contractors, often guided by the owner, an architect, or a furniture showroom. Design as a separately paid service grew with the architecture profession, whose fee conventions were set out in the Council of Architecture's guidance as a percentage of project cost. Interior designers inherited that percentage habit, and it remains common for large and premium projects. As apartment interiors became a mass market from the 1990s and 2000s, the per-square-foot rate emerged because flats are bought, sold and compared by area; it is simple to quote and easy for clients to understand.

The most recent change is the design-and-build firm, which offers design as part of a package with execution, sometimes advertised as "free design". In practice the design cost is carried inside the execution price. Each model persists because it suits a different kind of project and client, and none is inherently cheaper. The question is always what the fee covers.

The three models, and the hybrids

Per square foot: the area of the home is multiplied by a rate. It suits apartments and standard homes with clearly measured areas. The trap is the area basis — carpet, built-up or super built-up — which can change the fee by a third without changing the work.

Lump sum: a single fixed figure for a written scope. It suits defined projects — a single room, a fixed package of drawings, an office of known size — and gives both sides cost certainty, but only if the scope is listed precisely. Scope that is not on the list becomes a variation.

Percentage of project cost: the fee is a share of the interior execution cost, commonly cited at about 8–12 per cent. It suits large or premium projects where scope evolves, because the fee scales with the work. The trap is the definition of project cost: whether it includes loose furniture, appliances, lighting fixtures, owner-bought materials and taxes.

Hybrids are common. Some designers charge a lump sum for the design stage and a per-visit or monthly fee for supervision. Others charge per room for small jobs, or by the hour for consultations. Design-and-build firms may charge a design fee that is adjusted against the execution contract if the client proceeds. None of these is wrong, but each must be written down clearly.

These ranges are consistent with the figures used across this site's cost guides, where an illustrative design-plus-supervision rate of ₹250 per sq ft and a percentage band of about 8–12 per cent are used. For a whole new house, architects' full-service fees are usually quoted differently — commonly about 4–10 per cent of construction cost or about ₹100–200 per sq ft of built-up area — and may or may not include interiors.

What the fee buys: three levels of service

The single most important question is the level of service. Design only buys drawings and specifications; the client or a contractor executes them. Design plus supervision adds scheduled site visits, checking work against drawings, approving samples and resolving site issues. Turnkey or design-and-build adds execution itself, so one party is responsible for design, cost, time and quality. Each step transfers effort and risk from the client to the designer, and the price follows. Within the typical per-square-foot band, design-only scopes usually sit towards the lower end and design-plus-supervision towards the upper end.

Worked examples on real budgets

To compare the models honestly, they must be applied to realistic project costs. The examples below use the indicative Surat interior budgets published in this site's city cost guides: a 1,000 sq ft 2BHK at about ₹8–11 lakh basic, ₹13–18 lakh mid-range and ₹23 lakh or more premium; a 1,250 sq ft 3BHK at about ₹10–13.5 lakh, ₹15.5–22.5 lakh and ₹27–42 lakh; and a 3,000 sq ft bungalow including loose furniture at about ₹24–33.5 lakh, ₹36–56 lakh and ₹64–103 lakh. Fees are calculated on carpet area at ₹100–250 per sq ft, and at 8–12 per cent of the mid-range project cost, before GST.

Two things stand out. First, for comparable mid-range scopes the models land in similar territory — roughly ₹1–2.5 lakh for a 2BHK, ₹1.25–3.1 lakh for a 3BHK and ₹3–7.5 lakh for a bungalow — which is consistent with the ₹2–4 lakh band this site's 3BHK guides use for design-plus-supervision scope and the ₹4–9 lakh allowance in its bungalow cost guides, which lean towards upper-mid and premium work. Second, the percentage model moves with the budget: on a premium 3BHK at ₹27–42 lakh, 8–12 per cent becomes about ₹2.16–5.04 lakh for much the same drawing effort, while the per-square-foot fee stays put. That difference is the core of the choice.

The area-basis trap

A per-square-foot fee is only as clear as the area it multiplies. Indian flats are described by carpet area (the usable floor inside the walls, as defined under RERA), built-up area (carpet plus wall thickness and balconies) and super built-up area (built-up plus a share of lobbies, stairs, lifts and amenities). For the same flat, super built-up area is often about 25–40 per cent more than carpet area. A rate of ₹200 per sq ft can therefore mean very different fees.

The equivalent trap in a percentage fee is the cost base. A proposal should say whether project cost includes civil work, electrical and plumbing, loose furniture, appliances, decorative lights, curtains, owner-supplied materials, and GST on the execution contract. Excluding owner-bought items and taxes from the base is common, and fair to the client; including them without saying so inflates the fee.

GST, extras and what is usually not included

Design services in India attract GST at 18 per cent when the designer is registered, and a proper proposal states the fee and the GST separately. A ₹2,50,000 fee becomes ₹2,95,000 with GST. Some small practitioners below the registration threshold do not charge GST; this should be clear on the invoice. Common exclusions to check include: additional 3D views beyond an agreed number, walkthrough videos, extra revision rounds, travel and stay for outstation sites, structural or MEP consultants' fees, approvals and liaison with societies or authorities, and procurement handling charges on furniture and décor bought through the designer.

Payment schedule and the clauses that prevent disputes

Fees should be paid against deliverables, not dates. A front-loaded schedule — most of the fee before the first drawing — removes the designer's incentive to finish well, while a back-loaded one starves a small practice of cash. A balanced schedule, consistent with the example used in this site's guide to the design process, ties each payment to an approved stage.

Beyond the schedule, five clauses prevent most disputes: the scope list with deliverable counts; the basis (area definition or cost base); revision and visit limits with rates beyond them; a variation clause for added rooms or changed scope; and an exit clause stating what is owed and which drawings are released if either side ends the engagement. Ownership and reuse of drawings, and how long the designer remains available after handover, are worth a line each. This is general information; for a large contract, a lawyer's review is sensible.

Comparing two proposals line by line

The fairest way to compare proposals is to convert them to the same scope and the same basis. Take a hypothetical 1,250 sq ft 3BHK with a mid-range execution budget of about ₹18 lakh. Proposal A quotes ₹180 per sq ft on super built-up area of 1,700 sq ft, design only, with three 3D views and no site visits. Proposal B quotes 10 per cent of project cost, design plus supervision, with 3D views for all main rooms, two revision rounds and twelve scheduled site visits. At first glance A costs ₹3,06,000 and B costs ₹1,80,000, so A looks expensive and B cheap.

Converted, the picture changes. A's rate on carpet area is ₹3,06,000 ÷ 1,250 = about ₹245 per sq ft — for design only. B's fee depends on what the ₹18 lakh contains: if loose furniture and appliances worth ₹4 lakh are excluded from the base, the fee falls to ₹1,40,000; if the execution grows to ₹22 lakh through upgrades, it rises to ₹2,20,000. B also includes twelve visits that A would charge separately — at ₹1,500–5,000 a visit, that is ₹18,000–60,000 of service A does not offer. The table below sets the two side by side; neither is right or wrong, but only a line-by-line comparison shows the real difference.

A practical step many clients find useful is to ask for a fee cap on a percentage proposal — for example, a percentage of the actual cost but not more than an agreed figure unless the scope changes in writing. Equally, on a per-square-foot proposal, ask for the rate to be restated on carpet area and for the visit count to be written in. Both requests are reasonable, and the response says a lot about how the engagement will run.

Fees for commercial and hospitality interiors

Commercial projects — offices, clinics, showrooms, cafés, restaurants and hotels — use the same three models, but the balance shifts. Fixed opening dates make programme management a large part of the work, so supervision is almost always included and the visit schedule is denser. Services coordination — HVAC, fire, data, kitchen equipment, signage — adds consultant time, and brand standards or landlord requirements add approvals. Per-square-foot fees remain common for offices of known size; percentage fees are common for hospitality, where fit-out budgets per square foot are higher and the scope evolves; and lump sums are common for repeat formats such as retail chains, where each store follows a template. Whatever the model, the scope list for a commercial project should include the consultants the designer coordinates, the approvals handled and the programme milestones the fee is tied to.

Red flags in a fee proposal

A handful of patterns predict trouble. A single number with no deliverable list means anything and therefore nothing. A per-square-foot rate without an area basis, or a percentage without a cost base, lets the fee drift. "Supervision included" with no visit count or duration is an open question waiting for a disagreement. A schedule that asks for most of the fee before the layout is approved shifts all the risk to the client. And a proposal with no exit clause leaves both sides arguing over drawings and payments if the relationship ends. None of these signals dishonesty — they are usually haste — but each should be fixed in writing before the first payment.

Which model suits which project

• Standard apartment, clear areas: per square foot on carpet area, with supervision visits counted.
• Single room, kitchen or defined package: lump sum against a written deliverable list.
• Bungalow or premium home with evolving scope: percentage, with the cost base defined in writing.
• Owner with a trusted contractor and time to manage: design only, with paid visits at key stages.
• Owner who wants one point of responsibility: turnkey, with design deliverables still listed.
• Commercial fit-out with a fixed opening date: lump sum or per square foot with programme milestones.
• Avoid any model where the basis is not defined — area for per square foot, cost for percentage.
• Compare at least two proposals at the same level of service, line by line, before negotiating the number.

Where design fees are heading

Three trends are visible. Clients increasingly want fixed, transparent pricing, so per-square-foot and lump-sum models with published deliverable lists are spreading, especially for apartments. Digital tools — 3D rendering, online mood boards and remote reviews — have shortened some design stages, but they have not replaced measurement, detailing and site supervision, which is where most professional time goes. And design-and-build packages continue to grow, which makes it more important for clients to ask what share of a package is design, and what they would receive if they took the drawings to another contractor.

Frequently asked questions

How much does an interior designer charge per square foot in India?

Typical market practice is about ₹100–250 per sq ft of carpet area, plus GST, with design-only work towards the lower end and design-plus-supervision towards the upper end. Rates vary by city, experience and scope; always confirm the area basis.

Is a percentage fee better than a per square foot fee?

Neither is better in general. A percentage fee scales with the project and suits evolving, premium work; a per-square-foot fee is predictable and suits standard apartments. On mid-range budgets the two land in similar ranges; on premium budgets the percentage fee rises faster.

Do interior designers charge GST on fees?

Registered designers charge GST at 18 per cent on professional fees, shown separately on the invoice. A ₹2,50,000 fee becomes ₹2,95,000 with GST.

Is free interior design really free?

When design is offered free with execution, its cost is usually carried in the execution rates. That can be a fair arrangement, but ask what you would receive — drawings, specifications, 3D views — if you chose a different contractor.

What should an interior design fee include?

At minimum: measurement, layout, a stated number of 3D views or mood boards, working drawings for joinery, ceiling, electrical and flooring, specifications, a stated number of revisions and, if supervision is included, a stated number of site visits.