Accounting transactions: how to record and manage them

Published Tuesday 21 April 2026

Table of contents

• What are accounting transactions?
• Types of accounting transactions
• Why record-keeping matters
• Recording in cash accounting vs accrual accounting
• How to record transactions in accounting
• FAQs on accounting transactions

Key takeaways

• Record every business transaction — sales, expenses, loan payments, and asset purchases — accurately and promptly to maintain a clear picture of your financial health and stay compliant with tax rules.
• Keep all transaction records, including invoices, receipts, and bank statements, for at least seven years to meet legal requirements and avoid penalties during a tax audit.
• Reconcile your accounts monthly by matching your records against bank statements to catch errors, duplicate entries, and missing transactions before they affect your tax returns.
• Get professional help for complex transactions like depreciation and loan repayments, as these require specialist knowledge to record correctly and claim the right tax deductions.

What are accounting transactions?

An accounting transaction is any business event that has a financial impact and must be recorded in your books. When you pay a supplier, invoice a customer, or purchase equipment, you create an accounting transaction.

These transactions are the building blocks of your financial records. Every sale, expense, loan payment, and asset purchase counts as a transaction that needs capturing.

Recording them accurately gives you a clear picture of your business's financial health.

Transactions come in different forms depending on how and when they occur.

Types of accounting transactions

Understanding transaction types helps you categorise them correctly in your records. Most transactions fall into four groups:

• External transactions: events between your business and outside parties like customers, suppliers, or lenders, such as sales and purchases
• Internal transactions: financial events within your business, such as moving inventory between departments or recording vehicle depreciation
• Cash transactions: exchanges where money changes hands immediately, such as a customer paying with cash or a debit card
• Credit transactions: exchanges where payment happens later, such as invoicing a customer with 30-day terms or buying supplies on account

Understanding transaction types is just the first step. Keeping accurate records is essential.

Why record-keeping matters

Accurate transaction records help you understand your business performance and meet your legal obligations, which include retaining a record of your company's assets and liabilities for seven years. Without them, you're making decisions in the dark.

Recording transactions provides essential business insights:

• Profitability tracking: see if you're making or losing money
• Debt management: know who owes you and who you owe
• Cash flow planning: determine if you can meet upcoming payments
• Business valuation: understand what your business is worth

These records also help you stay compliant with tax rules. In New Zealand, you must register for goods and services tax (GST) if your projected annual turnover is NZ$60,000 or more.

Misrecorded transactions create serious risks:

• Inaccurate tax returns that trigger penalties
• Audit complications that cost time and money

The method you choose affects when transactions appear in your records.

Recording in cash accounting vs accrual accounting

Your accounting method determines when you record transactions, though options like the payments basis are generally restricted to businesses with sales of $2 million or less. The two main methods handle timing differently:

• Cash accounting: records transactions only when money actually changes hands
• Accrual accounting: records transactions when invoices are sent or received, regardless of when payment occurs

Now that you understand the accounting methods, here's how to put them into practice.

How to record transactions in accounting

Recording transactions follows a five-step process that turns raw financial data into organised, accurate records. Here's how to do it.

1. Capture transactions

Capturing transactions means collecting all the financial data from your business activities before it gets lost. Dedicated business banking simplifies this by separating personal and business expenses.

Key benefits of dedicated business banking:

• Complete transaction visibility: your bank statement shows all business activity
• Simplified data entry: copy transactions directly from bank records
• Automated integration:link accounting software to your bank for automatic data flow

Capture different transaction types using these methods.

Recording invoices and bills at time of issue

Accrual accounting requires immediate invoice recording. You can handle this manually by entering invoices when sent or received, or use accounting software for invoicing and bill processing that records details automatically.

Automating invoicing and billing gives you:

• Accurate amounts: no transcription errors
• Complete dates: proper timing documentation
• Tax calculations: automatic tax handling
• Contact management: customer and vendor details saved

Getting info from paper receipts

Receipt management is important for cash and personal card expenses:

1. Photograph receipts immediately with your phone
2. Choose your data entry method: type receipt information manually, or use optical character recognition apps that scan and enter data automatically

Pulling records from online shops or POS systems

You may be able to get detailed sales data from point-of-sale (POS) or ecommerce systems. Some software can link transaction fees or courier costs to specific transactions, which helps you work out the true cost of goods sold.

You can connect these systems to your accounting software to pull information together automatically.

Entering expenses from other bank accounts

If employees use a personal card for a business expense, reimburse them from your business account to capture the transaction. Make sure to secure a copy of the receipt.

If employees claim expenses regularly, an expense app on their phone can capture the receipt, send the reimbursement claim, and automate the accounting entry all at once.

Once you've captured your transactions, you need to organise them.

2. Categorise your transactions

Transaction categorisation sorts your business activities into meaningful groups so you can analyse where money comes from and where it goes.

Common income categories include:

• Sales revenue: money from customers
• Investment income: interest from bank accounts

Common expense categories include:

• Cost of goods sold (COGS): direct product costs
• Operating expenses: utilities, advertising, consulting

Your chart of accounts classifies all transactions into essential types:

• Income: revenue that increases business value
• Expenses: costs that reduce business value
• Liabilities: debts that must be repaid
• Assets: items that add value to your business
• Equity: owner contributions and retained earnings

Accounting software often comes with a default chart of accounts, or you can create your own. Involve an accountant or bookkeeper when setting up your chart of accounts, because your choices affect how well you can analyse your income and spending.

After categorising, some transactions need extra attention.

3. Get help with things like depreciation and loans

Complex transactions like depreciation and loans need professional guidance. Knowing the difference saves you time and keeps you compliant.

• Straightforward transactions: income and expenses flowing through your bank account
• Complex transactions: capital assets, depreciation, and loans that require specialist knowledge

You record assets like vehicles, equipment, and commercial buildings as fixed assets. Each year you depreciate these assets to reflect their loss in value, and you may be able to claim that depreciation as a tax deduction.

Get a professional to help with depreciation rules and keep you compliant. For instance, certain vehicles may be exempt from fringe benefit tax (FBT) if they meet specific conditions.

Loan repayments need splitting into principal and interest components, with each part recorded in a different account. Record owners' contributions and withdrawals carefully too.

Find accountants, bookkeepers, and tax professionals in Xero's advisor directory.

With transactions recorded and categorised, verify your work.

4. Check your numbers

Reconciliation is the process of matching your accounting records against your bank statements to catch errors and missing entries.

Common discrepancies to watch for:

• Cash transactions: payments not reflected in bank records
• Timing differences: transactions recorded in different periods
• Duplicate entries: the same transaction recorded twice
• Errors: incorrect amounts or categories

Regular reconciliation helps you:

• Catch mistakes early: before they affect tax returns
• Identify fraud: spot unauthorised transactions
• Maintain accuracy: keep your records reliable
• Stay audit-ready: have clean books for review

Reconcile your accounts monthly to maintain accurate records and quickly identify issues.

5. Review and adjust

Review your categorised transactions regularly to ensure accuracy. Look for patterns that might indicate errors or opportunities for improvement.

Common adjustments include:

• Correcting miscategorised transactions: moving items to the right accounts
• Recording accruals: capturing expenses or income not yet reflected
• Making journal entries: recording non-cash transactions like depreciation

Regular reviews keep your financial records accurate and give you confidence in your business decisions.

FAQs on accounting transactions

Here are answers to common questions about recording accounting transactions.

What's the difference between a transaction and a journal entry?

A transaction is the business event itself, while a journal entry is how you record that event in your accounting system. Every transaction requires at least one journal entry.

How long should I keep transaction records?

In New Zealand, you must keep transaction records for at least seven years. This includes invoices, receipts, bank statements, and other financial documents.

Can I use spreadsheets instead of accounting software?

You can use spreadsheets for simple record-keeping, but accounting software offers benefits like automation, bank feeds, and tax compliance features that save time and reduce errors.

What happens if I forget to record a transaction?

Record the transaction as soon as you discover it. If you've already filed tax returns, you may need to file an amendment depending on the materiality and timing of the omission.

Do I need to record every business expense?

Yes, record all business expenses to claim tax deductions and maintain accurate financial records. Keep receipts and documentation for each expense.