Let me answer the question you're actually asking. You're running a design studio, projects are coming in, and somewhere in the back of your head there's a nagging worry: do I need to register for GST yet, or am I fine? Maybe your CA said one thing, a friend said another, and a client's accountant said a third. Let me clear it up in plain language, the way I'd explain it to a studio owner over chai.
The short version
GST registration for an interior design or architecture studio depends on three things: how much you bill in a year, whether you work across state lines, and whether you actually want to register even when you don't have to. Get those three right and you'll know exactly where you stand.
Design services fall under "services" for GST, not goods. That matters, because the turnover threshold for services is different from the one for products. If you were selling furniture off a shelf you'd be in one bucket. But you're selling design, drawings, supervision, project management, services. So your threshold is the services threshold.
Threshold number one: your annual turnover
For a pure services business, the GST registration threshold is ₹20 lakh of aggregate turnover in a financial year in most of the country. If you're in one of the special category states, think the North-Eastern states, and a few others, that number drops to ₹10 lakh.
"Aggregate turnover" is the phrase to watch. It's not just the profit you take home. It's the total value of everything you invoice across the year, design fees, consultation, supervision charges, any reimbursements you bill, everything on a PAN-India basis. If you also run a second little venture on the same PAN, that adds in too. People get tripped up here because they think ₹20 lakh means profit. It doesn't. It's top-line billing.
So run the honest maths. If your studio is going to cross roughly ₹20 lakh in fees this year, you need to register before you cross it, not after you get a notice. And here's the thing nobody tells you early enough: once you register, you have to charge GST on everything going forward and file returns every month or quarter. It's not a one-time form. It's an ongoing rhythm. That rhythm is exactly why your invoicing setup matters, and I've written a full breakdown in our plain-English guide to GST for interior designers if you want the ground-level version.
Threshold number two: interstate work changes everything
This is the one that catches designers off guard, and it catches them hard.
The moment you do an interstate supply of services, you're registered in Karnataka and you take on a project in Maharashtra, invoicing a client there, the ₹20 lakh threshold logic gets complicated. For goods, interstate supply historically forced compulsory registration regardless of turnover. For services, there's a specific exemption that gives small service providers breathing room up to that ₹20 lakh figure even for interstate work. But the rules around place of supply are genuinely fiddly, and getting them wrong on a project across state lines is an expensive mistake.
Why? Because for interior design tied to a specific property, the "place of supply" is usually the location of that property, not where your office is, not where the client lives. So a Bengaluru studio designing a flat in Pune is looking at the property's location to decide whether it's a local (CGST + SGST) or interstate (IGST) transaction. Charge the wrong one and your client's accountant bounces the invoice, or worse, you under-collect and eat the difference at year-end.
If a decent chunk of your work is out-of-state, and for a lot of growing studios it is, because good designers get referred across cities, you should read our deeper piece on handling interstate projects and IGST and the companion on place of supply for interior design services. Those two together will save you from the most common invoicing headaches I see.
The practical takeaway: interstate work doesn't automatically force you to register the day you take one out-of-state project, thanks to the services exemption. But it raises the stakes enormously on getting your invoicing right, and many studios choose to register precisely because they're tired of the ambiguity.
Threshold number three: voluntary registration
Here's where it gets interesting, and where a lot of founders make the wrong call by defaulting to "avoid GST as long as possible."
You can register for GST voluntarily even if you're under ₹20 lakh. And for a design studio, that's often the smarter move. Let me tell you why.
Your clients are frequently registered businesses themselves, builders, developers, corporate offices, retail brands, hospitality groups. When you invoice them without GST, they can't claim input tax credit on your fee. When you invoice with GST, they can. To a GST-registered client, your ₹1,00,000 + 18% GST invoice effectively costs them ₹1,00,000, because they claim the ₹18,000 back. To that same client, an unregistered designer's ₹1,00,000 flat invoice costs them the full ₹1,00,000 with nothing to claim. You look more expensive by being unregistered. That's backwards, and it costs you deals.
Voluntary registration also lets you claim input credit, on your software subscriptions, your laptops, your rendering tools, your office rent if it's a GST invoice, materials you buy and pass through. For a studio spending real money on tools and samples, that credit adds up.
The trade-off is honest: once registered, you file returns whether you billed ₹5 lakh or ₹50 lakh that month, and you can't quietly deregister on a whim. So don't register the week you start. But if you're serious, your clients are businesses, and you're heading toward ₹20 lakh anyway, voluntary registration usually pays for itself.
A simple decision path
Let me make this concrete. Run yourself through this:
- Under ₹20 lakh, only local clients, mostly individuals paying from their own pocket? You can stay unregistered for now. Watch your running total.
- Approaching or crossing ₹20 lakh this year? Register before you cross. This is not optional.
- Doing regular interstate projects? You get relief up to ₹20 lakh, but your place-of-supply and IGST discipline has to be airtight. Many studios in this spot register voluntarily just to end the guesswork.
- Billing GST-registered clients, builders, developers, corporates? Strongly consider voluntary registration. You're likely leaving money and credibility on the table without it.
The part everyone underestimates
Registration is the easy day. The hard part is living with GST every month afterward: raising compliant invoices with the right HSN/SAC codes, splitting CGST/SGST versus IGST correctly per project location, reconciling what you collected against what you file, and not missing deadlines. Miss a filing and the late fees and interest pile up quietly until they're a real number.
This is exactly the drudgery I built Designa to kill for studios. When you register, your invoicing has to grow up with you, and that's a workflow problem, not just a tax form. If you want to get the mechanics right from day one, our guide on raising a GST-compliant invoice for design work walks through it step by step. And if you're at the stage where GST is on the table because you're genuinely growing, you're probably also feeling the jump from solo designer to a real studio team, the two usually happen together.
Where Designa fits
Designa is built India-first for exactly this reality. Your quotes turn straight into GST invoices with the right tax split baked in, whether the project is in your state or across the country. You collect through Razorpay without chasing bank transfers. And it syncs to Tally and Zoho Books, so your CA isn't re-typing every invoice at month-end. Leads, room-by-room specs, client-approved mood boards, procurement from PO to delivery, and a branded client portal all sit in the same connected workspace, so the tax side isn't bolted on as an afterthought, it's part of how the work flows.
One flat founding price: ₹2,299 + GST per year for the whole studio, up to 10 members, unlimited free client logins, a 7-day money-back guarantee, and done-for-you onboarding with data migration. No per-seat games.
If GST is on your mind because your studio is actually growing, that's a good problem. Sort the invoicing side properly before it becomes a month-end fire drill. Try it live at the demo, and when you're ready, grab the founding offer at go.designa.work. Get your billing right once, and stop losing evenings to spreadsheets.