How to Use Xero to Claim Tax Deductions on Home Office Expenses

GST-registered small businesses using a home space for work may qualify for deductions on proportional household costs. Setting up a proper process in Xero to track and claim these expenses can unlock hundreds of dollars monthly in GST credits and income tax deductions.

Three core steps

1. Track expenses accurately

You have three options for tracking home office expenses:

Manual tracking — Download bank statements, sort through transactions in a spreadsheet, and identify home office-related expenses. Accurate but time-consuming.

Personal finance apps — Tools like PocketSmith allow you to categorise personal spending, making it easier to identify and export home office expenses.

Prosaic — Connects directly to your personal bank accounts via open banking, automatically identifies claimable expenses, and shares them with your accountant. No manual work required.

2. Create a reimbursement structure in Xero

Once you have your home office expense data:

1. Draft a bill in Xero with home office expense categories (power, internet, rent/mortgage interest, insurance, etc.)
2. Enter your home office usage ratio (e.g. 20% if your office is 20% of your home's floor area)
3. Separate GST-eligible items from ineligible ones (mortgage principal is not GST-eligible; interest is)
4. Process a payment from your business account to your personal account as reimbursement
5. Attach supporting documentation for a clear audit trail

3. Submit GST returns regularly

Timely submissions — ideally every two months — optimise cash flow by ensuring you receive GST refunds regularly throughout the year rather than waiting for year end. This also ensures all eligible expenses are accounted for before they become difficult to trace.

Benefits of claiming home office expenses through Xero

• Regular GST credits throughout the year
• Income tax deductions that reduce your annual tax bill
• Tax-free contributions toward your household costs
• A clear paper trail that satisfies IRD requirements

Tips for accuracy

• Keep all receipts and invoices for home expenses
• Document the floor area calculation you use to determine your business percentage
• Review and update your percentage if your home office situation changes significantly
• Use consistent account codes in Xero for easy reporting

Related resources

• How to claim home office expenses — The full eligibility guide
• GST returns guide — Filing your GST return step by step
• Home office expenses calculator — Free spreadsheet template