C
- Cryptocurrency
- Crypto mining
- Crowdfunding (UK)
- Credit record
- Council tax
- Corporation tax
- Contractor
- Construction Industry Scheme (CIS)
- Compound interest
- Company Share Option Plan (CSOP)
- Company director
- Companies House
- Community Investment Tax Relief (CITR)
- Class 4 National Insurance
- Class 3 National Insurance
- Class 2 National Insurance
- Class 1 National Insurance
- Civil partnership
- CIS card
- Child benefit
- Chattel
- Charitable donations
- CHAPS payment
- CEST Status Tool
- Cash basis
- Carry forward
- Carer’s Allowance
- Capital loss
- Capital Gains Tax allowance
- Capital Gains Tax (CGT)
- Capital gain
- Capital Allowances