Accurate Reporting | On-Time Lodgement | ATO-Compliant
A Business Activity Statement (BAS) is one of the most important ongoing tax obligations for Australian businesses. Errors or late lodgements can lead to ATO penalties, interest, and cash-flow issues.
At DIA Taxation, we provide complete BAS preparation and lodgement services, covering GST, PAYG Withholding, and Instalment Activity Statements (IAS) — ensuring your business stays compliant and stress-free.
A Business Activity Statement is a form lodged with the ATO (monthly or quarterly) to report and pay business taxes, including:
Goods and Services Tax (GST)
PAYG Withholding
PAYG Income Tax Instalments
Other ATO obligations (where applicable)
BAS reporting must align with your accounting records, bank transactions, and payroll data.
You generally need to lodge a BAS if your business:
Is registered for GST
Withholds tax from employee wages
Has PAYG instalment obligations
Operates as a sole trader, partnership, company, or trust
📌 Even if no activity occurred, a Nil BAS may still be required.
At DIA Taxation, we manage the full BAS process from start to finish:
BAS review and reconciliation
Accurate preparation of all BAS labels
Electronic lodgement with the ATO
Due date monitoring and reminders
BAS amendments and corrections
We ensure your BAS matches your bookkeeping, payroll, and bank data — reducing ATO risk.
GST errors are one of the most common ATO audit triggers. We ensure your GST is reported correctly and completely.
GST calculation and reconciliation
Input Tax Credit (ITC) verification
Cash vs accrual GST method checks
GST adjustments and corrections
Lodgement of monthly or quarterly BAS
We help you claim every eligible GST credit while staying fully compliant.
If you employ staff or make payments subject to withholding, PAYG compliance is essential.
PAYG withholding calculation
Reconciliation with payroll and STP
Correct reporting of wages and contractor payments
BAS and IAS PAYG labels
Correction of under- or over-reported amounts
This ensures your employee tax obligations are met accurately and on time.
An Instalment Activity Statement (IAS) is usually issued to businesses that are not registered for GST or need to report PAYG instalments or withholding only.
PAYG income tax instalment calculation
Withholding-only reporting
IAS lodgement with the ATO
Instalment variation requests
Cash-flow impact review
We ensure IAS figures are reasonable, defensible, and aligned with your actual income.
Monthly BAS – Due on the 21st of the following month
Quarterly BAS – Due 28 days after quarter end
IAS – Varies depending on obligation
📅 Lodging through a registered tax agent like DIA Taxation may provide extended due dates.
✔ Registered Australian Tax Agents
✔ BAS & GST specialists
✔ Payroll and STP integration
✔ Transparent pricing
✔ Support for ATO queries and reviews
✔ Sole traders to growing businesses
We don’t just lodge forms — we protect your business from ATO penalties and compliance risks.
We also provide:
Monthly or quarterly BAS packages
Bookkeeping and reconciliation
Payroll & STP reporting
ATO compliance support and amendments
Avoid late fees, errors, and ATO issues.
Let DIA Taxation handle your Business Activity Statements, GST, PAYG, and IAS with confidence and accuracy.
👉 Book a Free Consultation
👉 Request a BAS Quote Today
