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The Hidden Tax Behind the National Minimum Wage Increase: What Businesses Really Pay — and What the Government Really Gets

When the UK government announces an increase to the National Minimum Wage (NMW) or National Living Wage (NLW), it’s presented as a clear win for low-paid workers. Media headlines celebrate higher hourly rates. Politicians praise the boost to household income.

But while employees may see more in their payslips, employers bear the true cost — and the government quietly cashes in.

This blog uncovers the real impact of minimum wage increases, particularly the one taking effect in April 2026. Far from being a purely employee-focused benefit, this change functions as a stealth tax on businesses, shifting a substantial share of the wage uplift straight into HMRC’s hands.

April 2026 Minimum Wage Rates: What’s Changing?

From 1 April 2026, the statutory rates are:

For workers aged 21+, this is a rise from the current £12.21/hour (April 2025) — an increase of 50p/hour or 4.1%.

Let’s put that into perspective for a typical business.

Example: 10 Full-Time Minimum Wage Workers (Aged 21+)

Assume all employees work 35 hours/week, 52 weeks/year:

So far, so simple: your wage bill rises by £9,100. But here’s where the real cost begins.

The Tax You Didn’t See Coming

Let’s look at how that £910 increase per person breaks down once HMRC takes its cut through:

• Employee Income Tax
• Employee NIC (8%)
• Employer NIC — now 15% above £5,000/year

The Real Breakdown: 2026/27

So for each £910 increase, the employee keeps around £493, and the government gets £417.

Multiply by 10 staff:

That’s over 45% of the total increase going straight to the government.

The Employer NIC Trap

From April 2025, the government made two critical changes to National Insurance for employers:

1. Raised the rate from 13.8% to 15%

2. Lowered the threshold from £9,100 to just £5,000

This means almost all of each employee’s wage is now liable for Employer NIC — and it costs businesses more than ever before.

And while the Employment Allowance (currently £10,500) offsets some NIC for small employers, it:

• Applies once per business, not per employee
• Runs out quickly if you have 3+ staff
• Offers no help for employee NIC or tax

For most growing employers, the full 15% rate hits hard.

Sector Impact: Why This Hits Labour-Intensive Firms Hardest

Businesses that rely on lower-wage, full-time staff are hit the hardest by this “wage rise” — especially:

Retail and Hospitality

• High headcounts on minimum wage
• Low profit margins
• Difficult to pass costs to price-sensitive customers

Social Care and Support Services

• Large numbers of carers aged 21+
• Publicly funded contracts don’t rise fast enough to match wage increases
• High turnover means onboarding costs pile up

Construction and Facilities

• Common use of 18–20-year-old labourers and apprentices
• Minimum wage increases force cost rebalancing across all levels of the pay scale

In all of these cases, the result is the same: the employer pays more, but the government collects more — often more than the employee receives.

Why This Is a Stealth Tax

The government has found a way to increase tax revenue without raising tax rates:

• It increases minimum wages.
• That triggers automatic increases in:
• • Employer NIC
  • Employee NIC
  • Income tax
• Businesses are forced to pay the difference.
• HMRC quietly collects a larger slice.

This is why many accountants now refer to wage increases as “fiscal levers disguised as social policy.”

The Political Framing vs. Business Reality

Publicly, ministers present the wage increase as a “cost of living support” measure. But when you trace the flow of money:

• Employees get a modest net boost
• Employers carry the full cost
• The Exchequer gains billions

From the government’s perspective, this is a politically safe tax rise — no need for Parliamentary battles over headline tax rates, no difficult budget statements. Just reframe a revenue tool as a worker win.

What Employers Should Do Now

1. Recalculate Payroll Budgets
   Use the confirmed 2026/27 rates and factor in:

• • £12.71 for 21+
  • £10.85 for 18–20
  • 15% Employer NIC from £5,000/year
  • Employment Allowance limits

1. Review Employment Structures

• • Could part-time roles help manage headcount cost?
  • Are all roles required year-round?
  • Would outsourcing reduce fixed wage costs?

1. Adjust Prices Carefully (If Possible)

• • Retailers: can you pass on costs in small price changes?
  • Care providers: renegotiate contracts before April
  • Services: consider staged increases to avoid margin collapse

1. Communicate Internally
   Be transparent with staff:

• • They’re not receiving the full benefit
  • You are carrying the tax load
  • Retention matters more than ever

Final Thoughts: A £9,100 Increase — But Over £4,000 Goes to HMRC

It’s easy to say “wages are going up.” But the reality for employers is a 45%+ tax on every increase.

For just 10 minimum-wage employees, you’ll pay:

• £9,100 more in wages
• Over £4,170 more in tax and NIC
• On top of pensions, holiday pay, and admin

Meanwhile, the government walks away with a windfall, and businesses — especially SMEs — are left to find efficiencies or absorb the loss.

This isn’t just a wage rise. It’s a stealth tax in plain sight.

Need Help Planning for April 2026?

At Merranti Accounting, we help employers:

• Forecast and budget payroll changes
• Optimise use of the Employment Allowance
• Reduce exposure to NIC increases
• Prepare a sustainable strategy for the years ahead

Contact us today to review your position before April’s increase arrives.