Guides
UK tax guides, organised by topic
Plain-English guides written by UK-qualified accountants. Use the filter or browse by category. No jargon, no email gates.
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Self Assessment basics
- First-time filing — start hereWhen you must file, deadlines, and how to register with HMRC
- How Self Assessment worksStep-by-step from registration to submission
- Payments on Account explainedWhy your first January is a "double bill"
- Late filing penaltiesWhat you owe and when penalties stack up
- Your UTR — what it is and how to get one10-digit reference for all HMRC dealings
Self-employed tax
- Sole trader tax guideExpenses, NI, payments on account, switching to Ltd
- CIS sub-contractor refundsAverage refund £600–£1,800 a year
- Freelancer tax guideSole trader vs Ltd, IR35, multi-currency
- What expenses can I claim?The "wholly and exclusively" rule explained
- The £1,000 Trading AllowanceWhen you don't need to register
- Class 4 NI for sole traders6% / 2% bands explained
Limited Companies
- Ltd company director's guideSalary, dividends, deadlines
- Annual Accounts at Companies HouseFRS 105 / FRS 102 explained
- Corporation Tax (CT600)How rates and reliefs work
- Dividends explainedTax rates, allowance, paying yourself tax-efficiently
- IR35 — inside or outside?Off-payroll working rules in plain English
Landlord tax
- Complete UK landlord tax guideSection 24, expenses, MTD, incorporation
- Section 24 mortgage interestWhy landlords lost full deduction
- Rent a Room scheme£7,500/year tax-free from a lodger
- Private Residence Relief on a saleAvoiding CGT on your former home
- MTD for landlords (April 2026)When it applies and what to do
Investor & Capital Gains tax
High earner tax
Expat & foreign income
Making Tax Digital
Tax basics & calculations
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