What You Actually Pay When You Build in Trivandrum
The invoice arrives. The GST line reads 18%. You were expecting 5%. Here is why both numbers exist, and why only one applies to you.
WhatsApp the Rzian teamThe Rate Is 18%. Here Is Why That Number Is Right.
When you hire a build partner to construct a house on land you already own: materials, labour, design, supervision, all bundled together. That is called a works contract under Indian tax law.
Works contracts for residential construction are taxed at 18% GST under HSN/SAC Code 9954, governed by Section 2(119) of the CGST Act, 2017. Since both your build partner and project site are in Kerala, this is an intra-state supply. The 18% splits evenly: half to the Central Government, half to the Kerala Government.
Why You Heard a Different Number
Three rates circulate in real estate conversations. All three are real. None of them apply to your build.
The 5% rate applies to a developer selling you a flat; they hold the land, you are purchasing a unit from their inventory. Your situation is the opposite: you own the land, you are hiring expertise. Different transaction, different rate. They are not comparable.
"I Live Abroad. So I Don't Pay GST."
This is the single most costly misconception we encounter from NRI clients planning construction in Kerala. It sounds logical. It is incorrect. Here is the full picture.
"My payment is coming from Dubai. I have an NRE account. NRIs have tax exemptions in India. So GST should not apply to me."
GST applies to every homeowner building in India, regardless of country of residence, passport, or the account the payment originates from. There is no NRI exemption in the GST Act.
Where This Belief Comes From
The confusion traces back to two legitimate but entirely separate rules: rules that are real, but have nothing to do with GST.
GST is a tax on the supply of services in India. The law asks one question: is this construction work being performed in India? If yes, GST applies at 18%. Your country of residence, your visa status, and your bank account type do not appear anywhere in that calculation.
A homeowner in Pattom and an NRI homeowner in Abu Dhabi, building identical homes in Trivandrum under identical works contracts, pay exactly the same GST on exactly the same basis. There is no NRI rate. There is no NRI exemption.
Why a Builder Cannot "Remove" the GST for You
Some NRI clients ask their build partner to either not charge GST or to show a lower amount on the invoice, reasoning that since the payment is coming from abroad, Indian tax should not apply.
A GST-registered contractor cannot do this. Under the GST Act, any contractor collecting payment for a taxable supply is legally required to collect and remit GST at the applicable rate, regardless of where the payment originates. A contractor who agrees to hide your GST liability is not offering a discount. They are creating a compliance exposure that sits on your project and your property.
Either the contractor is unregistered (a significant risk on a project of this value), or the GST amount is embedded silently in the quoted price. Either way, you pay it. The difference is whether you have a legal paper trail that protects you, or not.
Where Your NRI Status Is an Advantage
NRI status carries real benefits in Indian property: FEMA remittance permissions, NRE/NRO account flexibility, specific home loan products, and certain stamp duty provisions. These are worth understanding and using.
GST is not one of them. Budget your Trivandrum construction project with 18% GST included from the first number you write down, regardless of where you are when you sign the contract.
Building in Trivandrum from abroad? We give NRI clients a full cost breakdown with GST shown at every milestone, before you sign anything.
Get a transparent NRI cost breakdownWhat Exactly Is Being Taxed?
Everything in the contract. Design fees. Supervision. All materials. All labour. Every inclusion you agreed to: electricals, plumbing fixtures (Jaquar, Grohe, or Kohler, per your specification), basic finishes, whatever is written into your agreement.
There is no deduction for land. The one-third land abatement you may have read about is a developer-side adjustment for flat sales. Your land is not part of your construction contract. It is already yours.
GST is not your build partner's income. They collect it and pass it directly to the government. Every rupee of those Rs. 18 lakhs goes to the Central and State governments. If your scope expands mid-project, the additional amount also attracts 18% GST.
Want to understand what 18% looks like on your specific project budget?
WhatsApp the Rzian teamWhen Do You Actually Pay It?
GST is not a single payment at the end. It is paid alongside each milestone throughout the project, spread in the same proportions as your contract payments, from day one.
GST becomes payable on whichever happens first: the invoice date, the date you make a payment, or 30 days after a milestone is completed.
From the very first advance, GST applies. Your build partner issues a Receipt Voucher for the advance, showing the 18% component, and deposits it with the government that month.
Example: You pay Rs. 5 lakh as MOU advance. GST component = Rs. 0.9 lakh. Total on day one = Rs. 5.9 lakh.
| Milestone | % of Contract | Amount (Rs. 1 cr) | GST at 18% | You Pay |
|---|---|---|---|---|
| MOU / booking advance | 5% | Rs. 5 L | Rs. 0.9 L | Rs. 5.9 L |
| Commencement / mobilisation | 25% | Rs. 25 L | Rs. 4.5 L | Rs. 29.5 L |
| Plinth / DPC | 15% | Rs. 15 L | Rs. 2.7 L | Rs. 17.7 L |
| Ground floor slab | 15% | Rs. 15 L | Rs. 2.7 L | Rs. 17.7 L |
| First floor slab | 15% | Rs. 15 L | Rs. 2.7 L | Rs. 17.7 L |
| Plaster complete | 10% | Rs. 10 L | Rs. 1.8 L | Rs. 11.8 L |
| Tiling / finishes | 10% | Rs. 10 L | Rs. 1.8 L | Rs. 11.8 L |
| Completion / handover | 5% | Rs. 5 L | Rs. 0.9 L | Rs. 5.9 L |
| Total | 100% | Rs. 1 cr | Rs. 18 L | Rs. 1.18 cr |
By handover, the GST is already paid in full, distributed across the project in the same proportions as your payments. There is no large tax obligation waiting at the end.
Who Actually Pays the Government?
You never deal with the GST department. Not once. The flow is completely straightforward:
Your build partner handles all compliance, all filings, all reconciliation. From your side, it is a straightforward addition to each milestone payment.
Questions Homeowners Actually Ask
01 Why am I paying 18% when my friend paid only 5% on their flat?
02 If I delay my payment, does the GST get delayed too?
03 Can a build partner offer a deal without GST?
04 Will I get any of the GST back?
05 Why isn't GST shown inside the per-square-foot rate?
06 Did the September 2025 GST changes help me?
07 Is stamp duty also GST?
08 I am an NRI. Does any of this change for me?
09 What if GST rates change while my project is running?
Have a question about your specific project? WhatsApp the Rzian team and we will walk you through it.
The rate is fixed.
The paperwork is not yours.
Every registered build partner constructing on your land charges 18% GST. The straightforward ones show it clearly on every invoice, itemised as CGST and SGST, with an HSN code you can verify.
Budget for GST at each milestone from day one, starting with the MOU advance. The Rzian team is available to walk through your specific numbers before you commit to anything.
WhatsApp the Rzian teamThis article is for general informational purposes only and is current as of the date of publication. GST rates and rules can change. For decisions specific to your project, consult a chartered accountant or refer to the latest CBIC notifications.