Understanding National Insurance Contributions (NICs)
National Insurance is a UK tax that helps fund state benefits like the NHS, pensions, and maternity allowance. If you're employed or self-employed, you may need to pay NICs depending on your income and status.
National Insurance for Employed Individuals
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NICs are automatically deducted through PAYE by your employer
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You pay Class 1 NICs based on your weekly or monthly earnings
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Contributions help build entitlement to the State Pension and other benefits
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You stop paying NICs once you reach State Pension age
National Insurance for Self-Employed Individuals
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You pay NICs through your Self Assessment tax return
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NICs are based on your annual profits after expenses
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There are two types of NICs for self-employed people:
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Class 2 NICs (voluntary for low earners)
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Class 4 NICs (mandatory above a profit threshold)
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NIC Rates for Self-Employed (2025/26)
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Class 2 NICs:
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Voluntary if profits are below £6,725
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Automatically credited if profits are between £6,725 and £12,570
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Rate: £3.50 per week (voluntary)
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Class 4 NICs:
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6% on profits between £12,570 and £50,270
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2% on profits above £50,270
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Not payable if profits are below £12,570
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NICs and CIS Subcontractors
If you're paid under the Construction Industry Scheme (CIS):
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CIS deductions cover Income Tax only, not NICs
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You must still pay Class 4 NICs on your profits
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If your profits are low, consider voluntary Class 2 NICs to protect your State Pension
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NICs are calculated and paid through your Self Assessment tax return
Why NICs Matter
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They build your entitlement to:
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State Pension
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Maternity Allowance
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Employment and Support Allowance
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You need at least 10 qualifying years to receive any State Pension
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You need 35 qualifying years for the full State Pension
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Voluntary contributions can help fill gaps in your record
How can we Supports You
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Register for Self Assessment and track NIC obligations
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Calculate and file Class 4 NICs accurately
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Advise on voluntary Class 2 contributions
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Reconcile CIS deductions and ensure full compliance
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Review your NIC record and protect your future benefits