How to Record Taxable Supply Information for GST in New Zealand

To record taxable supply information for GST in New Zealand, you must document each supply's details including the date, description, amount excluding GST, GST amount, and total amount. This record supports your GST returns and helps track tax obligations. This article covers why accurate recording matters, detailed steps to record taxable supplies, a worked example, common mistakes to avoid, and how HelloGrowthCRM can help manage your sales follow-up.

Why this comes up / what goes wrong

Small business owners in New Zealand often need to record taxable supply information accurately to comply with GST regulations. This involves capturing details of every sale or supply that includes GST. Mistakes happen when owners record incomplete information, mix GST-exclusive and GST-inclusive amounts, or fail to keep consistent records. These errors can lead to incorrect GST returns, penalties, or missed tax credits. Many businesses run sales using spreadsheets, text messages, or email threads, making it hard to keep a clear, organised record.

Step-by-step

1. Identify the taxable supply: Confirm the transaction is a taxable supply subject to GST. This usually means the supply of goods or services in New Zealand by a GST-registered person.

1. Record the date of supply: Enter the date when the supply was made or the invoice was issued. This is essential for the correct GST period.

1. Describe the supply: Write a clear description of the goods or services supplied.

1. Enter the supply amount excluding GST: Record the net amount before GST is added.

1. Calculate and record the GST amount: Calculate GST by applying the GST rate (assumed illustrative rate 15%) to the net amount.

1. Record the total amount including GST: Add the GST amount to the net amount.

1. Keep supporting documents: Save invoices, receipts, or contracts that support the supply.

1. Review regularly: Check your records weekly or monthly to ensure accuracy and completeness.

1. Use consistent formats: Whether using spreadsheets or software, keep the same columns and data order to avoid confusion.

1. Prepare for GST return filing: Use these records to fill your GST return with confidence.

For help managing sales and follow-up, consider HelloGrowthCRM for New Zealand, which supports sales pipeline organisation.

Example (fictional figures)

An electrical contractor in Wellington made a taxable supply on 15/03/2024.

• Supply description: Installation of lighting fixtures
• Net amount excluding GST: NZ$2,000
• GST rate: 15% (assumed illustrative rate)

Calculations:

NZ$2,000 × 15% = NZ$300 (GST amount)

NZ$2,000 + NZ$300 = NZ$2,300 (total amount including GST)

Record:

Date	Description	Net Amount (NZ$)	GST (NZ$)	Total Amount (NZ$)
15/03/2024	Installation of lighting fixtures	2,000	300	2,300

Keep the invoice dated 15/03/2024 as proof.

Common mistakes

• Mixing GST-inclusive and GST-exclusive amounts: Always record the net amount before GST, then calculate GST separately to avoid errors.
• Forgetting to record the date of supply: This can cause GST to be reported in the wrong period. Always note the exact date.
• Not keeping supporting documents: Without invoices or receipts, your records lack proof. Store these digitally or physically in an organised way.
• Using inconsistent record formats: Changing spreadsheet layouts or fields can cause confusion. Stick to a consistent format.
• Delaying record updates: Recording supplies late increases errors and missed entries. Update your records promptly, ideally weekly.

Using a CRM with a built-in CRM dialer can help maintain timely follow-ups and accurate records.

Doing this in HelloGrowthCRM

HelloGrowthCRM offers Managed RevOps: a named revenue specialist works your follow-up queue every week, ensuring leads and sales records are up to date. This support helps founders without sales managers keep their sales pipeline clean and accurate, which indirectly aids in maintaining reliable taxable supply information. Learn more about this service at /services/managed-revops.

Frequently asked questions

What details must I record for each taxable supply? You should record the date of supply, a clear description, the net amount excluding GST, the GST amount, and the total including GST. Keep supporting documents like invoices.

How do I calculate GST on a supply? Multiply the net amount by the GST rate (usually 15% in New Zealand). For example, NZ$1,000 × 15% = NZ$150 GST.

Can I use spreadsheets to record taxable supplies? Yes, spreadsheets work if you keep consistent columns and update regularly. However, using a CRM can improve organisation and follow-up efficiency, as explained in HelloGrowthCRM for New Zealand.

What happens if I miss recording a taxable supply? Missing supplies can lead to incorrect GST returns and possible penalties. Regularly review your records to avoid omissions.

Is it necessary to keep physical copies of invoices? Physical or digital copies are acceptable, but must be kept securely and accessible for at least seven years as proof for Inland Revenue. Digital storage is often more practical.

Key takeaways

• Always record the date, description, net amount, GST amount, and total for each taxable supply.
• Calculate GST by applying the GST rate to the net amount, not the total.
• Keep supporting documents like invoices to back up your records.
• Use a consistent format and update records promptly to avoid errors.
• Regularly review your records to ensure completeness before filing GST returns.
• Consider Managed RevOps from HelloGrowthCRM to keep your sales and lead follow-up organised.

Start recording your taxable supplies accurately today to simplify your GST compliance. To help manage your sales and leads, Start on the Free Forever plan (200 leads, no credit card).

This article is general information, not tax or legal advice. Rules change; confirm the current position with Inland Revenue or your accountant before acting.