If Class 2 National Insurance is not showing on your tax return, the most likely explanation is that there is nothing to show. Mandatory Class 2 contributions for the self-employed were abolished from 6 April 2024, and where your profits are above £6,845 for 2025/26, HMRC now treats Class 2 as paid without charging you anything.1GOV.UK. Self-Employed National Insurance Rates The blank line on your calculation is almost certainly correct. A small group of filers still need to act, and the sections below cover who they are and what to do.
What Changed in April 2024
Before April 2024, self-employed workers with profits above the Lower Profits Limit of £12,570 owed a flat weekly Class 2 charge collected through Self Assessment. That charge appeared as a line item on every tax calculation. From the 2024/25 tax year onward, the government scrapped mandatory Class 2 payments. Self-employed people still receive the benefit entitlement that Class 2 always provided, but no money changes hands.1GOV.UK. Self-Employed National Insurance Rates
So if you filed for 2024/25 or later and expected to see the familiar £3-something weekly charge, it does not exist anymore. Your NI record is still being credited. The payment line just is not there because there is nothing to pay.
What Your Profit Level Means for Your Record
Whether the blank line is fine, or a signal to act, depends on where your profits sit. For 2025/26 the Small Profits Threshold is £6,845 and the Lower Profits Limit is £12,570.2GOV.UK. Rates and Allowances: National Insurance Contributions
- Profits above £12,570: Class 2 is treated as paid, and the year counts as a qualifying year for your State Pension. You will still pay Class 4 NIC at 6% on profits between £12,570 and £50,270, and 2% above that.1GOV.UK. Self-Employed National Insurance Rates
- Profits between £6,845 and £12,570: Class 2 is also treated as paid. You owe no Class 2 or Class 4, and the year still counts toward your benefit entitlement.1GOV.UK. Self-Employed National Insurance Rates
- Profits below £6,845: nothing is credited automatically. The year will not count as a qualifying year unless you take action.
One nuance matters here. For a “treated as paid” credit to actually reach your NI record, you need to file your Self Assessment return on time. If you file late, the deemed payment may not update your record in time for any contributory benefits that depend on it. Filing on time matters more now than when actual money was involved, because there is no payment receipt to fall back on.
When the Blank Line Is a Problem
Two situations turn a missing Class 2 line into something you need to fix.
Low Profits and No Voluntary Opt-In
If your self-employed profits are below £6,845, your NI record gets nothing automatically. You can protect it by choosing to pay voluntary Class 2 contributions at £3.50 per week, which works out to £182 for a full year.3GOV.UK. Voluntary National Insurance – Rates This keeps you eligible for the State Pension and contributory benefits like Maternity Allowance.4GOV.UK. Pay Voluntary Class 2 National Insurance Contributions if You Do Not Pay Through Self Assessment
This is where the “not showing” issue most often bites people. The voluntary election has to be actively selected within the National Insurance section of your online return. HMRC’s system assumes you do not want to pay unless you tick that box. If you intended to contribute voluntarily but forgot to opt in, the calculation shows zero and the year does not count.
Class 2 vs Class 3 if You Qualify
Class 2 is not the only way to fill NI record gaps voluntarily. Class 3 contributions serve the same purpose but cost significantly more. For 2025/26, Class 3 runs at £18.40 per week, roughly £957 for a full year, more than five times the Class 2 rate.3GOV.UK. Voluntary National Insurance – Rates Class 2 is available to the self-employed and certain individuals living abroad. Class 3 is the fallback for anyone else.5GOV.UK. Voluntary National Insurance – Check Which National Insurance Contributions You Can Pay If you qualify for Class 2, use it. Paying Class 3 when Class 2 is available is spending five times as much for the same result.
Check Your NI Record Before Assuming a Problem
Before doing anything else, check what HMRC actually has on file. You can view your National Insurance record online through your Personal Tax Account. The service shows what you have paid up to the start of the current tax year, any credits received, whether any years have gaps, and whether voluntary contributions would help.6GOV.UK. Check Your National Insurance Record
The online record does not update in real time for the current tax year. If you have just filed your return, it may take until the following April before the deemed Class 2 credit appears. A gap showing for the current year is not necessarily a problem. Check again after the tax year ends. Gaps in earlier years are the ones that need attention.
How to Fix a Missed Opt-In or a Genuine Gap
Amending a Recent Return
If you filed and forgot to tick the voluntary Class 2 box, you can amend the return online through your Government Gateway account. Open the relevant tax year, select the option to amend, and work through the sections until you reach the National Insurance page. Tick the voluntary contribution box, confirm the changes, and submit.
Your updated calculation appears within a few days for online amendments. The deadline for amending a return is 12 months from the 31 January filing deadline for that tax year. For 2024/25, that means you have until 31 January 2027 to make corrections.7GOV.UK. Self Assessment Tax Returns: If You Need to Change Your Return
Calling HMRC
If the online portal will not let you amend a return, or you are dealing with an older gap that falls outside the amendment window, call the National Insurance helpline on 0300 200 3500.8GOV.UK. National Insurance: Enquiries Have your ten-digit Unique Taxpayer Reference (found in your Personal Tax Account, the HMRC app, or on previous tax correspondence) and your National Insurance number ready.9GOV.UK. Find Your UTR Number Helpline staff can override system blocks and process manual adjustments that are not possible through Self Assessment.
When Data Mismatches Are the Cause
Occasionally the issue is not thresholds or opt-ins at all. HMRC and the Department for Work and Pensions share data to maintain NI records, and mismatched personal details can prevent contributions from landing in the right place. A misspelled name, an incorrect date of birth, or a National Insurance number with a transposed digit can all break the link between your tax return and your NI record.
These issues surface when people check their NI record online and find a gap for a year they know they filed. If the return itself looks correct but the NI record does not reflect it, the problem is likely sitting in the data-matching layer between the two systems. The NI helpline can investigate and correct the mismatch, though resolution can take several weeks.
Older Returns Before 2024/25
If you are looking at a return from 2023/24 or earlier, the old rules still apply to that year. For 2023/24 the Small Profits Threshold was £6,725 and the Lower Profits Limit was £12,570. If your profits exceeded £12,570 that year, Class 2 should have been charged at £3.45 per week. If your profits fell between £6,725 and £12,570, you received an NI credit automatically without a charge appearing.
A missing entry on a pre-2024/25 return where profits exceeded the Lower Profits Limit is more likely to be a genuine error. Check whether the return can still be amended within the 12-month window. For 2023/24 returns, the amendment deadline is 31 January 2026.7GOV.UK. Self Assessment Tax Returns: If You Need to Change Your Return If that window has passed, call the NI helpline to see whether a manual correction is still possible.