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How GST works on flooring jobs in New Zealand: 15% on materials and labour, the $60,000 threshold, GST-inclusive quotes and invoice rules for contractors.
Flooring GST Calculation NZ: What to Charge on Materials, Labour and Quotes
A homeowner asks for a price on 60 square metres of engineered oak, supplied and laid. The quote goes out at $9,660. Was that GST inclusive? How much of it belongs to IRD? And if the customer adds a hallway halfway through, what happens to the number? Most flooring businesses can answer these on a good day. On a busy Friday with five quotes to send, small errors creep in, and they add up across a year of returns.
How GST Works for a Flooring Business in New Zealand
GST in New Zealand is 15% on most goods and services, and flooring is no exception. Once you're registered, you charge it on your sales (output GST) and claim back the GST you pay on business costs such as stock, blades, adhesives, tools and the business share of your vehicle (input GST). You then file a return with Inland Revenue, and the difference is either paid to IRD or refunded to you.
Most small flooring businesses file two-monthly. Six-monthly filing is available if turnover is under $500,000, and returns are generally due on the 28th of the month after the period ends. Everything goes through myIR or your accounting software. If your jobs, quotes and invoices already live in one system, such as purpose-built
flooring software, the GST figures for your return are easier to trust because they come straight from the job records.
GST Registration for Flooring Contractors in NZ
You must register once your taxable turnover exceeds $60,000 in any 12-month period. That's a rolling window, not the financial year. It also looks forward: if you reasonably expect to pass $60,000 in the next 12 months, you should register now rather than wait for the number to arrive.
Leaving it late is expensive. IRD can backdate your registration and expect GST on sales from the date you should have registered, whether or not you charged customers for it. Registering is done through myIR.
Below $60,000, voluntary registration is allowed. It suits flooring businesses with heavy material costs, because you can claim GST back on stock and tools, and many of your commercial customers can claim the GST you charge them anyway. The trade-off is more admin, and residential customers pay 15% more.
Do You Charge GST on Flooring Installation in NZ?
Yes. If you're GST registered, you charge GST on installation, and the whole job is taxed at 15% on the total price. A supply-and-install job is one taxable supply, so there's no separate rate for labour and no exemption for the fitting side of the work.
That makes the calculation simple: add up materials, labour, freight, and any other charges on the job, then apply 15% to the total.
GST on Flooring Materials vs Labour in NZ
Materials and labour are both taxed at 15%. Splitting them on a quote is useful for transparency and margin tracking, but it doesn't change the GST outcome. Here's a worked example.
| Item | GST exclusive | GST (15%) | GST inclusive |
|---|
| Flooring supplied | $6,000.00 | $900.00 | $6,900.00 |
| Installation labour | $2,400.00 | $360.00 | $2,760.00 |
| Total | $8,400.00 | $1,260.00 | $9,660.00 |
Going the other way is where mistakes happen. To back GST out of $9,660, divide by 1.15 to get $8,400. Or multiply the total by 3 and divide by 23 to find the GST portion, which gives $1,260. Taking 15% of $9,660 gives $1,449, which is wrong by almost $190 on a single job.
Flooring Quote GST in New Zealand: Inclusive or Exclusive?
For homeowners, quote GST inclusive. The Commerce Commission expects prices to
include or be clear about the 15% GST, and a residential customer thinks in terms of what leaves their bank account. Saying "$8,400 plus GST" invites an unwelcome surprise when the invoice arrives.
For commercial customers such as builders, property managers and developers, GST exclusive is normal, because they claim it back. The clearest layout is the same either way: subtotal, GST, total, in that order, with the words "GST inclusive" or "plus GST" stated plainly at the top. Whichever you choose, label it clearly and stay consistent within each quote.
Common GST Mistakes Flooring Businesses Make
Backing GST out the wrong way
Multiplying an inclusive total by 15% instead of dividing by 1.15 overstates GST on every quote.
Forgetting extras
Freight, waste disposal, subfloor prep and underlay all belong in the taxable total. Leaving them off the quote means paying the GST out of your own margin.
Getting the accounting basis wrong on deposits
On the invoice basis, GST goes into your return when you issue the invoice or receive payment, whichever comes first. On the payments basis, it goes in when the money arrives. Either way, a deposit is not GST-free money to be sorted out later.
Missing GST on scope changes
A variation, a change of product mid-job or an extra room needs GST added the same way as the original quote.
Registering late
Watching the $60,000 figure monthly is easier than explaining a backdated registration.
Flooring Contractor Tax Invoice Requirements in NZ
Since 1 April 2023, New Zealand works on taxable supply information rather than a single prescribed tax invoice.
IRD says you can keep using a document headed "tax invoice", and most flooring businesses do, so nothing needs to change on the day-to-day paperwork. What matters is that the right details are present, and they scale with the size of the sale:
$200 or less: basic records showing a taxable supply took place.
Over $200 up to $1,000: your name and GST number, the date, a description of the goods or services, and the GST amount or a statement that the price includes GST.
Over $1,000: everything above, plus the buyer's name and address or another way of identifying them. Most flooring jobs sit in this band.
If a GST-registered customer asks for taxable supply information on a supply over $200, you generally have 28 days to provide it. Corrections such as credit or debit notes are now called supply correction information. Keep the records for seven years. A missing GST number or a lump-sum total with no GST shown is the usual reason a commercial customer's claim gets questioned.
How Automating GST Takes the Guesswork Out of Every Quote
Manual GST works until volume picks up. Then it's ten quotes a week, a spreadsheet, and a calculator sitting next to the coffee. HomeArize's
fast quoting feature puts GST at 15% on the full job total automatically, keeps materials and labour visible as separate lines, and shows subtotal, GST and total in a clean layout your customer can read.
Once the customer accepts, the quote converts into an invoice with the figures already in place, and
payment tracking shows what has been paid, so deposits and balances line up with your GST returns instead of needing reconciliation at the end of the period.
GST on flooring comes down to a few things done consistently: 15% on the whole job, GST-inclusive pricing for homeowners, the 1.15 divisor for reverse calculations, and taxable supply information that meets IRD's thresholds. If you'd like a single system for quoting through to invoicing, see how
flooring business software handles it, or
book a demo and run one of your own quotes through it.
This guide is general information based on IRD and Commerce Commission guidance at the time of writing and is not tax advice. Talk to an accountant about your specific situation.
Highlights
- GST is 15% on the whole flooring job in New Zealand. Materials and installation labour are not taxed at different rates.
- Registration is compulsory once taxable turnover passes $60,000 in any 12-month period, past or expected.
- To take GST out of a GST-inclusive price, divide by 1.15. Multiplying by 15% overstates the GST.
FAQs
Do you charge GST on flooring installation in NZ?
Yes, if you're GST registered. Installation labour is taxed at 15% as part of the job, and the whole supply-and-install price is treated as one taxable supply.
Is GST calculated differently on flooring materials and labour in NZ?
No. Both are taxed at 15%. Splitting them on a quote helps with transparency and margins but doesn't change the GST payable.
When must a flooring contractor register for GST in NZ?
When taxable turnover exceeds $60,000 in any 12-month period, or you reasonably expect it to. You can register voluntarily below that, and registration is done through myIR.
How do I take GST out of a GST-inclusive flooring quote?
Divide the inclusive total by 1.15 to get the GST-exclusive amount. The GST portion is the total multiplied by 3 and divided by 23. For $9,660, the GST is $1,260.
Should a flooring quote in NZ be GST inclusive or exclusive?
For residential customers, GST inclusive is the safer choice because prices to consumers must include or be clear about GST. Commercial customers usually prefer GST exclusive with a separate GST line. Label it clearly either way.
What must be on a flooring contractor's tax invoice in NZ?
For sales over $1,000, include your name and GST number, the date, a description of the work, the GST amount or a statement that GST is included, and the buyer's name and address or other identifier. IRD calls this taxable supply information.
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