August / September
August
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1st - Corporation tax due for accounting periods ending 31st October 2024 not payable by instalments
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4th - Summer Bank Holiday (Scotland)
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7th - deadline for VAT returns and payments for month or quarter ending 30th June 2025
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19th - CIS returns due for month ended 5th August 2025
- PAYE, NICS, student loan deductions and CIS deductions due for month ending 5th August paid non electronically
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22nd - PAYE, NICS, student loan deductions and CIS deductions due for month ending 5th August paid electronically
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25th - Summer Bank Holiday (UK except Scotland)
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31st - Corporation tax return due for accounting period ending 31st August 2024
September
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1st - Corporation tax due for accounting periods ending 30th November 2024 not payable by instalments
- HMRC review advisory fuel rates for company cars
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7th - deadline for VAT returns and payments for month or quarter ending 31st July 2025
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19th - CIS returns due for month ended 5th September 2025
- PAYE, NICS, student loan deductions and CIS deductions due for month ending 5th September paid non electronically
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22nd - PAYE, NICS, student loan deductions and CIS deductions due for month ending 5th September paid electronically
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30th - Corporation tax return due for accounting period ending 30th September 2024