September 10, 2025
Mobile Phone & Internet Split – Claiming the Work Portion Without Guessing Updated: 08/09/25 • Reviewed by: GoTax Registered Tax Agent If you use your mobile or internet for work, you can claim a portion as a tax deduction. The trick is getting the split right. In 2025, the ATO expects proof — diaries, logs, or usage breakdowns. Guesswork won’t cut it. Here’s