Most tax trouble in small New Zealand businesses is not caused by disagreement with Inland Revenue. It is caused by a date arriving before the money did. The system is actually predictable: a small number of settings determine every deadline you will ever have, and once you know your own settings you can write the year out in advance and stop reacting. What follows is the structure rather than a list to copy, because your dates depend on choices that are specific to you. Setting aside a share of every payment received is the habit that makes those dates survivable, and some people feed that reserve with a complementary daily income from an app such as I am Beezy alongside the trading income itself.
Which taxes actually apply to you?
Before dates, work out which obligations you have at all. Businesses routinely track deadlines that do not apply to them and miss one that does.
Income tax and provisional tax
Every business pays income tax on its profit. Provisional tax is not a separate tax: it is income tax paid in instalments during the year, and you fall into it once your residual tax for a year passes the threshold Inland Revenue publishes. There are several calculation methods, including a standard uplift method, an estimation method, a ratio method tied to GST, and an accounting-software method that calculates as you go. Which one suits you depends on how seasonal and how predictable your income is.
GST, once you cross the registration threshold
GST registration becomes compulsory once turnover in a twelve-month period passes the threshold Inland Revenue sets, and it is voluntary below that. Registering voluntarily can make sense if your customers are themselves registered businesses, and it rarely makes sense if you sell to consumers and buy little. Once registered, you file returns on a frequency chosen at registration.
PAYE, ACC levies and the rest
If you employ anyone, payday filing and PAYE apply from the first payment. ACC invoices arrive separately from Inland Revenue, based on your declared earnings and your work classification, which catches out people who assume everything comes from one agency. Depending on your activity, fringe benefit tax, resident withholding tax and schedular payments may also apply. The obligations you actually have should be listed once, in writing, and reviewed whenever the business changes shape.
Your balance date decides every other date
The balance date is the end of your financial year, and it is the anchor from which almost every deadline is derived. Change it and the entire calendar moves.
The standard balance date
The standard balance date in New Zealand is the end of March, and unless you have applied for and been granted a different one, that is yours. A non-standard balance date exists for genuine business reasons, such as a seasonal trade, and it shifts your filing and payment dates accordingly. If you are not certain which you have, it is visible in myIR.
Your GST filing frequency
GST can be filed monthly, two-monthly or six-monthly depending on turnover and on what you choose. Monthly suits businesses that regularly claim more than they collect, two-monthly is the common middle, and six-monthly reduces admin at the cost of holding money you owe for longer. The frequency you pick also determines which months contain a GST deadline.
Whether you use a tax agent
Being linked to a tax agent before the cut-off gives access to an extension of time, which moves your filing deadline substantially later and shifts your terminal tax date as well. This is a real and often overlooked benefit of engaging an accountant, quite apart from the advice. It only applies if the link is registered in time.
The standard year, in the order it arrives
The table below sets out the shape of a year for a business on the standard balance date using common settings. Treat it as the skeleton, then confirm your own dates in myIR, because your filing frequency and provisional method can move several of these.
| Obligation | When it typically falls | What moves it |
|---|---|---|
| GST return and payment | The 28th of the month after the period ends | Two dates in the year shift off the 28th |
| First provisional instalment | Late August | Balance date and provisional method |
| Second provisional instalment | Mid January | Balance date and provisional method |
| Third provisional instalment | Early May | Balance date and provisional method |
| Terminal tax for the prior year | Early February, later with a tax agent | Whether an agent extension applies |
| Income tax return filing | Early July, later with a tax agent | Whether an agent extension applies |
The GST rhythm
GST is the metronome of the year. Two points in the calendar move off the usual day because of the holiday period and the end of the financial year, and those two are the ones people miss. Put them in your calendar with a reminder a fortnight ahead, not a day ahead.
The provisional instalments
Under the standard method, instalments are spread through the year and calculated from your previous return with an uplift. This works when income is stable and badly when it is not: a year of growth leaves you underpaid, and a year of decline leaves you overpaid. Review the method annually rather than letting it run by default.
Terminal tax and filing
Terminal tax settles the difference between what you paid provisionally and what you actually owed. Filing the return and paying terminal tax are two separate events on two separate dates, and confusing them is a common and entirely avoidable error.
The first year is the awkward one
A new business pays no provisional tax in its first year, because there is no prior return to calculate from. The bill for that first year therefore arrives as a single amount well after the trading happened, and frequently at the same time as the first provisional instalments for the following year. That overlap is the single most common cash flow shock reported by new operators, and it is entirely predictable. If you are in your first year of trading, set money aside from the first invoice and assume you will need it for two obligations at once rather than one. Nothing about the situation is unusual, but nobody warns you before it happens.
What happens if you file late, or cannot pay?
Late filing and inability to pay are different problems with different consequences, and the worst outcome comes from treating them as the same thing and doing nothing.
Filing late versus paying late
Filing is always within your control, so file on time even when the money is not there. A return filed on time with a payment problem is a manageable conversation. A missing return is an escalating one, and it also removes your ability to arrange anything, because nobody can arrange a payment for an amount that has not been declared.
Instalment arrangements
Inland Revenue can agree an arrangement to pay over time, and asking early materially improves what is available. Interest and penalties apply according to published rules, and the earlier the approach, the smaller the base they apply to. The request is made through myIR.
The mistake that costs the most
It is not a missed date. It is treating GST collected as business income. That money was never yours, and spending it produces a shortfall that grows every cycle until something breaks. A separate account that receives a fixed share of every payment received solves this permanently and takes an afternoon to set up.
| Situation | First action | Where |
|---|---|---|
| Return due, money not available | File on time anyway, then request an arrangement | myIR |
| Unsure of your own dates | Check the obligations listed against your account | myIR |
| Income much higher than last year | Reconsider your provisional method before the next instalment | Accountant or Inland Revenue guidance |
| Turnover approaching the GST threshold | Check the twelve-month test and register in time | Inland Revenue GST guidance |
| First employee starting | Set up payday filing before the first pay run | myIR and your payroll software |
| ACC invoice looks wrong | Check the work classification held for you | ACC directly |
Building your tax reserve with I am Beezy
A calendar tells you when money leaves. It does nothing about whether the money is there, and that is the part that actually determines whether a deadline is stressful.
The reserve comes first
Move a fixed share of every payment received into a separate account on the day it arrives, before anything else is paid. Doing it automatically removes the monthly decision, and the decision is what fails, not the arithmetic.
Feeding it from outside the business
I am Beezy pays for content you consult, so it produces a complementary daily income that is not tied to your invoicing cycle. Directed into the tax account rather than into general spending, it softens exactly the moments a small business finds hardest: the first provisional instalment, and a quiet trading month with a deadline in it.
Setting the calendar up once, in myIR
This is a single session of work that removes a recurring source of anxiety for the rest of the year.
Turn your obligations into calendar entries
Log in, read the obligations recorded against your account, and enter each date twice: once a fortnight ahead as a preparation reminder, once on the day. The advance reminder is the one that does the work.
Reconcile on a fixed day each month
Pick a day, reconcile the bank feed, file receipts, and check the reserve balance against what is coming. Bookkeeping done monthly takes an hour, and the same bookkeeping done annually takes a weekend and produces worse numbers.
When an accountant pays for itself
Bring one in when you employ someone, when you change structure, when income becomes irregular enough that the provisional method matters, or when you want the extension of time an agent link provides. Below that, myIR and disciplined records genuinely cover it. Set the calendar this week, open the reserve account, and if you want a daily income feeding it while the business finds its rhythm, consulting content on I am Beezy pays out to your usual payment method.
