Professional Services

The £40 Billion Budget Impact: Automated Tax Planning for SME Clients

3 December 2025
9 min
Ben Gale
The £40 Billion Budget Impact: Automated Tax Planning for SME Clients

The Budget Impact

The October 2024 Budget announced significant changes to employer National Insurance:

  • Rate increase from 13.8% to 15%
  • Threshold reduction from £9,100 to £5,000
  • Combined impact estimated at around £25 billion annually
  • SME employers disproportionately affected

For SME clients, this means meaningful increases in employment costs. For accountants, it's an opportunity to deliver proactive, valuable tax planning advice.

15%
New employer NI rate
£5,000
Reduced NI threshold
£25B
Annual revenue increase

Impact on SME Clients

Direct Cost Increase

For a typical SME with 20 employees earning average wages:

FactorBefore BudgetAfter BudgetChange
NI Rate13.8%15%+1.2pp
Threshold£9,100£5,000-£4,100
Estimated annual increase--£15,000-25,000

Illustrative—specific numbers vary by wage structure

Wider Implications

Beyond direct costs:

  • Reduced capacity for pay increases
  • Pressure on hiring decisions
  • Potential price increase needs
  • Cash flow timing effects

Clients need help understanding and responding.

Info

The Budget changes affect almost every SME employer. This isn't niche tax planning—it's core business advice that every client with employees needs.

Planning Opportunities

Salary Sacrifice Arrangements

Salary sacrifice remains attractive:

Pension Contributions:

  • Reduce employer NI by reducing gross pay
  • Employee benefits from tax relief
  • Popular and well-understood

Other Benefits:

  • Cycle to work schemes
  • Childcare vouchers (legacy)
  • Electric vehicles
  • Technology schemes

Considerations:

  • National Minimum Wage constraints
  • Employee willingness
  • Administrative complexity
  • Communication requirements

Business Structure Review

Some structures become more or less attractive:

Dividend vs Salary: With higher employer NI, dividend extraction (where appropriate) becomes relatively more attractive.

Company vs Self-Employment: Employment costs rise; contractor relationships may be reconsidered (with IR35 compliance).

Family Employment: Employment of family members for genuine work remains tax-efficient.

Financial planning documents and calculator
Proactive tax planning helps clients navigate Budget changes

Capital Allowances

Full Expensing: Continued 100% first-year allowances for qualifying expenditure. Investment to improve productivity can offset employment cost increases.

R&D Relief: For qualifying activities, enhanced relief available. Often overlooked by SMEs.

Timing Considerations

Bonus Planning: Consider timing of bonuses around tax year boundaries and cash flow.

Recruitment Timing: If hiring planned, understand cost implications under new rates.

Investment Timing: Capital allowances and other reliefs have optimal timing.

Pro Tip

The best tax planning isn't about aggressive schemes—it's about ensuring clients don't pay more than they need to through ignorance or poor timing.

Automated Scenario Modelling

The Traditional Approach

Manual tax planning involves:

  • Gathering client information
  • Building calculations
  • Testing scenarios one by one
  • Updating when things change
  • Significant time per client

This limits how many clients receive proactive advice.

The Automated Approach

Modern tools enable:

  • Quick scenario generation
  • Multiple options compared simultaneously
  • Real-time updates as data changes
  • Consistent methodology
  • Scalable across client base

Tools for Scenario Modelling

Spreadsheet-Based: Build templates for common scenarios:

  • Input client parameters
  • Automatic calculation of options
  • Comparison output
  • Documentation generated

Dedicated Software:

  • Taxfiler scenario modelling
  • Iris Tax Planning
  • Professional package features

AI-Assisted:

  • Generate scenarios from natural language
  • Identify planning opportunities automatically
  • Summarise options for clients

Implementing Proactive Planning

Identify Affected Clients

Prioritise:

  1. Larger employers (higher absolute impact)
  2. Labour-intensive businesses
  3. Clients already margin-pressured
  4. Those who haven't heard from you about this

Prepare Standard Scenarios

Create Templates For:

  • Basic NI impact calculation
  • Salary sacrifice comparison
  • Dividend/salary mix optimisation
  • Bonus timing scenarios

Benefits:

  • Consistent methodology
  • Faster delivery
  • Quality assurance
  • Scalable approach

Deliver Proactively

Don't Wait:

  • Reach out to clients first
  • Provide impact assessment
  • Offer planning meeting
  • Demonstrate value

Meeting Structure:

  1. Show their specific impact
  2. Present available options
  3. Discuss preferences and constraints
  4. Recommend approach
  5. Agree next steps

Follow Through

Implementation:

  • Support with any changes
  • Document decisions
  • Update systems
  • Plan ongoing review

Documentation:

  • Letter confirming advice
  • Calculation workings
  • Client decisions recorded
  • Compliance with professional standards

Value Demonstration

For Clients

Show clearly:

  • What they would have paid without advice
  • What they'll pay with your recommended approach
  • The saving achieved
  • Your role in delivering it

For Your Practice

Proactive tax planning:

  • Demonstrates value beyond compliance
  • Justifies advisory fees
  • Builds client loyalty
  • Differentiates from competitors

Pricing Advisory Work

Options:

  • Fixed fee for planning review
  • Percentage of savings achieved
  • Included in enhanced service tier
  • Separate engagement for implementation

Key Principle: Value-based pricing reflects benefit to client, not just time spent.

Automation Enables Scale

The Economics

Manual Approach:

  • 4 hours per client for full planning review
  • At 100 clients affected = 400 hours
  • Impossible to do for everyone
  • Advisory becomes premium service

Automated Approach:

  • 30 minutes per client with tools
  • 100 clients = 50 hours
  • Proactive service for all
  • Advisory becomes standard

Building the Capability

  1. Develop templates for common scenarios
  2. Integrate with client data where possible
  3. Train team on tools and approach
  4. Create workflow for delivery
  5. Measure and improve based on results

The Competitive Advantage

When clients face increased costs:

Some Accountants:

  • Wait for clients to ask
  • Process the compliance
  • Miss planning opportunities
  • Appear reactive

Proactive Accountants:

  • Reach out first
  • Provide analysis and options
  • Deliver genuine savings
  • Build advisory relationships

Which would clients prefer? Which will retain clients and earn referrals?

Warning

If you don't proactively advise your clients on Budget implications, someone else might—whether that's a competitor, a financial adviser, or the business next door sharing their experience.

Getting Started

This Week

  1. Identify clients most affected
  2. Calculate basic impact for top 10
  3. Draft outreach communication
  4. Schedule planning conversations

This Month

  1. Build scenario modelling templates
  2. Train team on approach
  3. Roll out to broader client base
  4. Track engagement and results

Ongoing

  1. Refine tools based on experience
  2. Document common questions and answers
  3. Build into standard annual service
  4. Plan for future Budget changes

The Budget changes are significant. Your response to them demonstrates your value as an advisor.


Want to deliver proactive tax planning at scale? We help accounting practices implement automation that makes advisory services efficient and consistent.

Book a consultation to discuss your advisory service development.

Ben Gale

Ben Gale

25 years IT and leadership experience. Based in Woodley, Reading. Helping Thames Valley businesses automate workflows and reduce admin overhead.

Learn more about Ben →

Frequently Asked Questions

How much will the employer NI increase cost my business?

For a typical SME with 20 employees earning average wages, the combined effect of the NI rate increase from 13.8% to 15% and threshold reduction from £9,100 to £5,000 results in an estimated annual increase of £15,000-25,000, though specific numbers vary by wage structure.

What tax planning opportunities exist after the October 2024 Budget?

Key opportunities include salary sacrifice arrangements for pensions and benefits, reviewing dividend versus salary extraction, considering business structure, timing bonuses and recruitment strategically, and maximising capital allowances including full expensing and R&D relief.

How can automation help with tax planning for clients?

Automated scenario modelling enables quick generation and comparison of multiple options, real-time updates as data changes, and consistent methodology across your client base. This reduces planning review time from 4 hours to 30 minutes per client, making proactive advisory scalable.

Should I offer tax planning proactively to clients?

Yes, proactive outreach demonstrates value beyond compliance, builds client loyalty, and differentiates your practice from competitors. Clients who receive proactive advice showing their specific impact and available options are more likely to remain loyal and provide referrals.

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