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Tax The Online Accountants Tax The Online Accountants

Capital Allowances UK

Capital allowances UK explained for 2026. Discover the £1m AIA, full expensing, new 40% allowance, 14% writing-down rate and calculate your tax savings.

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IR35

What is IR35? Understand inside vs outside IR35, who decides your status, tax implications and HMRC rules in our 2026 UK contractor guide.

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Tax The Online Accountants Tax The Online Accountants

R&D Tax Credits

R&D tax credits explained for UK companies. Check 2026 relief rates, eligibility, qualifying costs and HMRC claim rules. Includes a free R&D calculator.

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PAYE The Online Accountants PAYE The Online Accountants

0T Tax Code

What does the 0T tax code mean? Discover why HMRC uses it, how much tax you pay, how to correct it and whether you can claim a refund.

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VAT The Online Accountants VAT The Online Accountants

HMRC Online Services

Access HMRC online services with our UK guide. Learn how to sign in, register, use Government Gateway or GOV.UK One Login and fix common issues.

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PAYE The Online Accountants PAYE The Online Accountants

What is my PAYE Reference Number?

What is my PAYE reference number? See what an Employer PAYE Reference looks like, where to find it on your P60 or P45, and how it differs from a UTR.

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Tax The Online Accountants Tax The Online Accountants

Personal Tax Account HMRC

Access your HMRC Personal Tax Account. Learn how to sign in, register with GOV.UK One Login, check tax codes, claim refunds and manage Self Assessment.

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PAYE The Online Accountants PAYE The Online Accountants

Check Employment Status (CEST)

Check employment status using HMRC's CEST tool. Learn how to determine employed or self-employed status, understand IR35 and interpret your results.

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