Turnkey vs Design-Only Interior Services: Cost Comparison

Every family planning an interior in India eventually faces the same fork. One path is design-only: pay a designer for drawings and specifications, then hire the carpenter, electrician, painter, false-ceiling team and plumber separately and buy the boards and hardware directly. The other is turnkey: sign one contract with a firm that designs, buys, builds and hands over the keys. The question families ask is simple — which one costs less? — but the quotations they collect almost never answer it, because they are not quoting the same thing.

A design-only fee of ₹1.5 lakh looks small beside a turnkey quotation of ₹22 lakh, and a carpenter's ₹14 lakh estimate looks like a bargain against both. None of these numbers is the real cost of a finished home. The real cost includes the fee, the execution at whatever rate is actually paid, the materials wasted or bought twice, the rework when two trades clash, the GST, the weeks of rent or EMI while the flat sits unfinished, and the hours someone in the family spends on site. This site's guide to choosing between the two routes explains who carries responsibility in each; this article goes one level deeper and puts rupees against every line, for a 2BHK, a 3BHK and a bungalow, so the comparison can be made honestly.

The most common mistake is to compare a turnkey price with a contractor's estimate alone, leaving out the design fee and every risk the family will carry. The second most common is the reverse: assuming a turnkey firm's margin is pure profit, when much of it pays for supervision, coordination, factory accuracy and a warranty that a design-only family has to arrange — or go without — on its own.

The two routes, defined by where the money goes

In design-only, the family makes at least two kinds of payment. The first is the design fee, commonly about ₹100–250 per sq ft of carpet area or about 8–12 per cent of the interior project cost, as this site's fee guide sets out, with design-only work towards the lower end of that band and design plus supervision towards the upper end. The second is execution, paid directly to each contractor and each material shop. The family is the employer, the purchaser and, unless it pays for supervision, the quality checker.

In turnkey, the family makes one kind of payment: instalments against a single contract price. Inside that price sit the same materials and much of the same labour, plus the firm's design time, its site supervisor, its purchasing and logistics, its factory overheads if it builds modular joinery, its warranty obligations and its margin. Some firms show design as a separate line; others fold it into the execution rates and advertise free design. Design-plus-supervision sits between the two: the family still contracts each trade but pays the designer to visit the site at agreed stages and check the work against the drawings.

A short history of how Indian interiors were bought

For most of the twentieth century, Indian homes were furnished by a carpenter, or mistri, working on site with a family member or an architect's sketch. Boards were bought by the family from a local timber market, the carpenter's labour was paid weekly or per item, and polishers, electricians and painters came in sequence. There was no separate design fee for most households; the design, such as it was, came from the carpenter's repertoire and the family's instructions. Interior designers as an independent profession grew in the larger cities from the later decades of the century, initially serving offices, hotels and wealthy homes, and they typically worked design-only or with supervision.

Two changes in the last two decades made turnkey mainstream for ordinary flats. The first was the spread of factory-made modular joinery — CNC-cut, edge-banded carcasses produced away from site — which rewarded firms that could control the drawing, the factory and the installation together. The second was the growth of apartment living for working couples and families living far from their property, who could not supervise a site several times a week. Today both routes coexist in every Indian city. The price question has not gone away; it has simply become harder to read, because one route quotes a fee and the other quotes a contract price.

The 3BHK, line by line

The fairest comparison holds the project constant. The worked example below uses the same reference as this site's turnkey guide: a 1,250 sq ft carpet-area 3BHK finished to a mid-range specification, which the 3BHK cost guide places at about ₹15.5–22.5 lakh. Execution at direct contractor rates is taken as ₹18 lakh — the same materials and the same scope in every route. Design fees follow the fee guide: about ₹100–175 per sq ft for design-only and an illustrative ₹250 per sq ft for design plus supervision. These are worked assumptions to show where the money goes, not any particular firm's prices.

Three things stand out. First, the ranges overlap almost completely: the cheapest design-only outcome is about ₹1 lakh below the cheapest turnkey outcome, and the most expensive outcomes of the two are within ₹1.5 lakh of each other. Second, the design-only total depends heavily on the allowance for rework, wastage and delay, which is not a bill anyone sends — it is what happens when a carpenter cuts a shutter to the wrong size, a plumber's point lands behind a wardrobe, or a laminate batch runs short and the replacement does not match. Third, design plus supervision buys most of the protection of turnkey for a fixed fee, which is why many careful families choose it.

2BHK and bungalow: how the gap changes with size

The same method can be applied to smaller and larger homes. For a 1,000 sq ft 2BHK, this site's city guides put a mid-range interior at about ₹13–18 lakh; the example below takes execution at direct rates of ₹14 lakh. For a 3,000 sq ft bungalow including loose furniture, the mid-range band is about ₹36–56 lakh; the example takes ₹45 lakh. Fees, allowances and the turnkey uplift use the same percentages and per-square-foot rates as the 3BHK.

On small homes, the routes stay close because a single trusted carpenter can deliver most of the work and coordination is simple. On large homes, two forces pull apart. The turnkey uplift grows in absolute terms — 11–25 per cent of ₹45 lakh is ₹5–11 lakh — and part of a bungalow budget is loose furniture, lighting fixtures and décor that a family can buy directly without any margin. At the same time, a bungalow has more trades, civil changes and site risk, so the design-only family's allowance for rework and delay also grows. That is why bungalows are most often done with design plus supervision, or turnkey with loose furniture bought separately and specialist vendors appointed directly.

Where the turnkey margin actually goes

A turnkey contract price is often compared with the sum of contractor quotes and the difference is called the firm's profit. In practice the uplift pays for several real services that a design-only family either does itself or does without. A full-time or frequent site supervisor sequences the trades, checks levels and lines, and stops errors before they are built in. A purchasing team buys boards, laminates and hardware in matched batches, receives and stores them, and absorbs the cost when a shipment is damaged. A factory, if the firm has one, cuts carcasses to a fraction of a millimetre and edge-bands them under controlled conditions, which reduces site wastage and site time. A warranty desk returns to adjust hinges, re-align shutters and repair defects after handover. And the firm holds its own working capital, paying vendors before the family's later instalments arrive.

The hidden costs of design-only

Design-only is genuinely cheaper when everything goes to plan. The difficulty is that interior sites rarely go entirely to plan, and in design-only every deviation is the family's cost. The common leaks are predictable. Materials are over-ordered as insurance or under-ordered and topped up later at a different shade. A trade arrives before the previous one has finished and has to come back. A detail is built from a 3D image rather than a working drawing and has to be redone. The site sits idle because the family could not visit to approve a sample. And the final ten per cent of snags — shutters out of line, a socket at the wrong height, paint touch-ups after the carpenter leaves — takes weeks to close when no single party is responsible for closing them.

Time deserves its own note because it is the cost families most often ignore. A design-only site typically needs a family member present several times a week for decisions, purchases and checks. As an illustration only, three visits a week of about two hours each over a 20-week programme is about 120 hours — three working weeks. For a salaried family, a family abroad, or a business owner whose own time earns money, that is a real cost. This site's turnkey guide notes that design-only programmes often run 18–26 weeks against about 12–20 weeks for turnkey including design; every extra month is also a month of rent or EMI on a home that cannot be used.

GST and invoicing: comparing like with like

GST changes the comparison more than many families expect, and it is easy to compare a GST-inclusive quotation with a GST-exclusive one by mistake. Design fees from a registered designer carry GST, commonly 18 per cent, shown separately on the invoice. A registered turnkey firm charges GST on its contract, commonly 18 per cent on works contracts, and a proper quotation states clearly whether its figures include it. In design-only, the picture is mixed: boards, laminates and hardware bought from shops already carry GST in their price, while some small contractors are not registered and do not charge GST on their labour. That can make design-only look cheaper on paper by more than the real difference in work. This is general information; the exact tax treatment depends on registrations and the nature of each contract, so a chartered accountant should confirm it for any large project.

Cash flow: when the money leaves the account

Two routes with the same total can feel very different month by month. A turnkey firm usually asks for a booking amount, a large instalment when factory production starts, another when material reaches site, and the balance at handover, ideally with a small retention until the snag list is closed. Design-only spreads payments more evenly — small fee instalments at first, then weekly labour payments and material purchases that rise steeply once carpentry starts. The illustrative schedules in Fig. 3 show the shape; actual milestones vary by firm and contract.

Comparing a turnkey quotation with a design-only budget

To compare honestly, both sides must describe the same home. That means the same drawings, the same board grades, the same shutter finishes, the same hardware brands and the same list of exclusions. In practice the cleanest method is to get a full drawing set and specification first — either from a design-only engagement or as the first stage of a turnkey contract — and then price it both ways. A turnkey quotation should be itemised room by room with sizes, materials and rates, not given as a single lump sum. A design-only budget should add the fee, every contractor's quotation, the materials list priced at shop rates, GST where it applies, and a stated allowance for wastage and rework.

The plan in Fig. 4 marks six places where comparisons most often go wrong. Wardrobe lofts and the inner laminate on carcasses are sometimes missing from cheap quotations. Kitchen appliances, chimney ducting and the removal of an old platform are usually excluded everywhere but not always stated. Loose furniture and curtains are rarely in a turnkey contract but sometimes appear in a design-only family's budget because they were bought during the project. Bathroom accessories, AC drain routes and balcony finishes slip between trades. A comparison is fair only when each of these items is either priced on both sides or excluded on both sides.

When each route is genuinely cheaper

Design-only is the cheaper route when four conditions hold together: a complete, dimensioned drawing set and specification; a contractor the family has used before and trusts; a family member who can be on site several times a week; and a home with a modest number of trades — a flat with no civil changes, for example. Under those conditions the rework and delay allowance shrinks towards zero and the family keeps the firm's margin. Turnkey is the cheaper route — in total cost including time and risk — when any one of those conditions fails, when the deadline is fixed (a wedding, a school term, a lease ending), or when the family lives in another city or abroad. Design plus supervision is the right answer for a large group in between: families who want to choose and pay their own vendors but cannot judge quality themselves.

Where pricing of interior services is heading

Three trends are visible in Indian interior practice. First, more turnkey firms are publishing itemised rate cards — per square foot of wardrobe or kitchen elevation, per square foot of ceiling, per point of electrical work — which makes comparison with design-only budgets easier. Second, more designers offer a hybrid: design-only drawings with a menu of paid site visits, or a design fee that is adjusted against execution if the family proceeds with the same firm. Third, digital tools — shared drawing sets, photo-based site reports and online material approvals — are lowering the cost of supervision, which narrows the gap between design-only and turnkey for families who choose to manage. None of this changes the core arithmetic: someone always pays for coordination, either in a margin or in the family's own time and risk.

Rules for comparing the two routes

• Compare totals for the same drawings, specification and exclusions — never a turnkey price against a contractor's estimate alone.
• Add the design fee, GST where it applies, and a stated 3–10 per cent allowance for rework, wastage and delay to every design-only budget.
• Ask a turnkey firm for an itemised room-by-room quotation with sizes, materials, brands and rates.
• Treat 'free design' as design priced into the execution rates, and ask what happens to the drawings if the family does not proceed.
• Tie every turnkey payment to verified progress and keep a retention of about 5 per cent until snags are closed.
• Count the family's own time and any extra months of rent or EMI as part of the cost.
• On bungalows, buy loose furniture, décor and specialist items directly unless the firm's margin on them is disclosed and fair.
• Choose design plus supervision when control matters but on-site judgement is missing.

Frequently asked questions

Is turnkey interior always more expensive than design-only?

Not in total. Turnkey adds a coordination and supervision uplift — about 11–25 per cent over direct contractor rates in the worked example here — but design-only shifts rework, wastage, delay and supervision onto the family. On a mid-range 3BHK the totals overlap: about ₹20–22 lakh design-only and ₹21–23.5 lakh turnkey, indicative October 2026.

How much do interior designers charge for design only?

Commonly about ₹100–250 per sq ft of carpet area, or about 8–12 per cent of the interior project cost, plus GST — with design-only scopes towards the lower end. For a 1,250 sq ft 3BHK, design-only at ₹100–175 per sq ft is about ₹1.25–2.2 lakh. Always confirm the area basis, the drawing list and the number of revisions.

What margin does a turnkey interior company charge?

Firms rarely publish it, and it varies with what the firm provides — factory joinery, supervision, purchasing and warranty. As a planning check, this site's worked example uses an uplift of about 11–25 per cent over direct contractor rates for the same scope. A quotation well above that band should show what extra service it includes; one well below it should be checked for missing items.

Is 'free design' with turnkey a good deal?

It can be, but design is never free; its cost is recovered in the execution rates. Compare a free-design turnkey quotation with design-only fees plus contractor quotes for the same drawings, and ask whether the drawings are handed over if the family decides not to proceed with execution.

Can the family buy materials directly in a turnkey project to save money?

Sometimes, by agreement, for items such as loose furniture, appliances, lights or sanitaryware. For joinery boards, laminates and hardware it usually causes more problems than it saves, because the firm's warranty and programme depend on the material arriving in matched batches on time. Agree in writing which items the family supplies and who is responsible for their quality and delivery.