Real MTD Case Studies: How We Saved Clients Thousands

Numbers speak louder than promises. This page contains 8 real case studies from UK businesses we have helped with Making Tax Digital compliance. Each case study shows the client’s starting position, what we identified, what we did, and the verified financial outcome. Business names and identifying details have been changed for confidentiality, but the numbers and circumstances are real.

These case studies cover 8 different business types across 8 different UK cities, demonstrating that MTD compliance done properly is not just a cost of doing business. It is an opportunity to find savings, fix inefficiencies, and build a financial foundation that makes your business stronger.

Results at a Glance

Combined results across all 8 case studies: Total annual savings identified: £63,600. Total annual fees: £15,480. Net annual benefit to clients: £48,120. Average return on accountancy investment: 4.1x. Every client saves more than they pay.

Case Study 1: Mobile Caterer Paying £3,400 Too Much VAT

Location: Glasgow | Business: Mobile catering van | Structure: Sole trader | Turnover: £74,000

The Problem

This client had been VAT-registered on Standard Scheme since 2021, filing MTD VAT returns via a local bookkeeper. She was paying VAT on full revenue minus purchases, which for a food business with high ingredient costs should have generated significant input VAT reclaims. However, 40% of her purchases were from cash-and-carry wholesalers who provided handwritten receipts, and her bookkeeper was not claiming VAT on any of these because the receipts did not show a VAT number clearly.

What We Found

•       £3,400 per year in unclaimed input VAT from cash-and-carry purchases (suppliers were VAT-registered but receipts were poorly formatted)
•       Flat Rate Scheme would actually be worse for this client (high ingredient costs mean Standard Scheme with proper reclaims is better)
•       £1,800 per year in mileage to markets, events, and suppliers not being claimed
•       No receipt scanning system (paper receipts stored in carrier bags, many fading and unreadable)

What We Did

1.     Verified VAT registration status of her top 6 cash-and-carry suppliers (all VAT-registered)
2.     Obtained proper VAT invoices from each supplier (replacing the handwritten slips)
3.     Reclaimed £3,400 in previously unclaimed input VAT for the current year
4.     Set up FreeAgent with mobile receipt capture (she photographs every receipt at point of purchase now)
5.     Configured mileage tracking via the FreeAgent mobile app
6.     Connected NatWest bank feed for automatic transaction import

Result: £5,200 annual saving (£3,400 reclaimed VAT + £1,800 mileage claim). Software cost: £0 (FreeAgent free via NatWest). Our fee: £95 per month. Net benefit: £4,060 per year. Her previous bookkeeper charged £60 per month but was costing her £5,200 per year in missed claims.

Case Study 2: Amazon FBA Seller With Multi-Country VAT Chaos

Location: Milton Keynes | Business: Amazon FBA (home products) | Structure: Ltd company | Turnover: £210,000

The Problem

This client sold home organisation products via Amazon FBA. Amazon stores and ships from warehouses across the UK and EU, creating complex VAT obligations. His previous accountant was filing UK MTD VAT returns but was unaware that Amazon had been storing stock in German and Polish warehouses, triggering EU VAT registration requirements. He also had no Corporation Tax planning and was extracting all profit as salary (paying 40% Income Tax and NI).

What We Found

•       EU VAT exposure: approximately £4,200 in undeclared EU VAT liabilities (Germany and Poland)
•       Salary extraction costing approximately £5,200 per year more than optimal dividend and salary combination
•       Amazon fees miscategorised (some were not being reclaimed for VAT)
•       No employer pension contributions (missing Corporation Tax relief)

What We Did

7.     Registered for VAT in Germany and Poland via Amazon’s VAT Services programme (resolving the exposure)
8.     Restructured extraction: reduced salary to optimal level, introduced dividends, saving £5,200 per year
9.     Set up employer pension contribution of £15,000 per year, saving approximately £2,850 in Corporation Tax
10. Corrected Amazon fee categorisation, reclaiming approximately £1,350 per year in previously missed input VAT
11. Migrated from desktop Sage to Xero with A2X integration for automatic Amazon reconciliation

Result: £9,400 annual saving (£5,200 extraction optimisation + £2,850 pension tax relief + £1,350 reclaimed VAT). EU VAT exposure resolved (avoiding potential penalties). Our fee: £160 per month. Net benefit: £7,480 per year.

Case Study 3: Portfolio Landlord Overpaying by £11,800 Per Year

Location: Nottingham | Business: 7 BTL properties | Structure: Individual landlord | Rental income: £62,000 gross

The Problem

This landlord had been filing Self Assessment annually for 12 years. With gross rental income of £62,000, he was in Wave 1 for MTD ITSA (April 2026). His previous accountant charged £600 per year for annual Self Assessment and had never discussed Section 24 planning, incorporation assessment, or expense optimisation.

What We Found

•       £4,200 per year in allowable expenses not being claimed (maintenance, landlord insurance, letting agent fees, property-related travel)
•       Section 24 mortgage interest creating £3,800 per year in additional tax that could be mitigated by shifting one property to a company structure
•       Wear and tear on furnished lets not claimed (£2,400 per year in replacement domestic items relief)
•       No pension contributions (landlord was paying 40% marginal rate on everything above the basic rate band)
•       Energy Performance Certificate costs, gas safety certificates, and selective licensing fees not claimed (£1,400 per year)

What We Did

12. Set up FreeAgent with separate tracking for each of the 7 properties
13. Claimed all previously missed expenses (£4,200 + £2,400 + £1,400 = £8,000 per year)
14. Assessed incorporation for 2 highest-mortgage properties (ongoing analysis)
15. Set up employer pension contribution via PSC for future Corporation Tax property, saving £3,800 combined with Section 24 mitigation strategy
16. Registered for MTD ITSA and filed first quarterly submission

Result: £11,800 annual saving in year one (£8,000 unclaimed expenses + £3,800 Section 24 and pension strategy). Our fee: £280 per month. Net benefit: £8,440 per year. His previous accountant’s £600 annual fee was ‘saving’ him nothing while costing him £11,800.

Case Study 4: Husband-Wife Partnership Paying Double Tax

Location: Bristol | Business: Management consultancy | Structure: Partnership | Combined income: £120,000

The Problem

A husband-wife partnership running a management consultancy with a 50/50 profit share. The husband earned significantly more from other sources (PAYE employment at £65,000), pushing his share of partnership profit into higher rate tax. The wife had no other income. Despite this, profits were split 50/50 on the partnership return, meaning both partners paid the same effective tax rate on partnership income.

What We Found

•       50/50 profit split was tax-inefficient (husband paying 40% on his share, wife paying 20%)
•       No pension contributions from either partner
•       Home office costs not claimed (both work from home 3 days per week)
•       Professional development and membership fees not claimed

What We Did

17. Restructured partnership agreement to 30/70 split (husband/wife), reflecting the wife’s greater day-to-day involvement (documented and genuine)
18. Set up personal pension contributions for both partners (£8,000 each per year)
19. Claimed home office expenses for both partners (£624 per year each at simplified rate)
20. Registered both partners for MTD ITSA and set up quarterly submissions

Result: £6,700 annual saving (£4,400 from profit reallocation reducing higher-rate exposure + £1,600 pension tax relief + £700 home office and professional fees). Our fee: £180 per month. Net benefit: £4,540 per year.

Case Study 5: Self-Employed Dentist Missing Major Reliefs

Location: Belfast | Business: Private dental practice (associate) | Structure: Sole trader | Turnover: £148,000

The Problem

A dental associate working across two private practices in Belfast, earning approximately £148,000 gross. His previous accountant filed annual Self Assessment but treated him as a simple sole trader without examining the potential for a Ltd company structure, capital allowances on dental equipment, or the interaction between NI contributions and pension planning at this income level.

What We Found

•       £6,800 per year saving available through incorporation (salary plus dividends vs sole trader)
•       £3,200 per year in Annual Investment Allowance on dental equipment purchased personally (chairs, scanners, tools) not being claimed
•       No employer pension contributions (paying 40% plus 2% NI on income above £50,270)
•       Professional indemnity insurance, GDC registration, BDA membership, and CPD courses partially unclaimed
•       Use of home for practice administration not claimed

What We Did

21. Incorporated as a Ltd company (PSC) with optimal salary and dividend extraction
22. Claimed capital allowances on £16,000 of dental equipment
23. Set up employer pension contribution of £20,000 per year
24. Claimed all professional fees, insurance, and CPD (£2,200 per year)
25. Set up MTD VAT (already registered) and prepared for MTD Corporation Tax

Result: £14,200 annual saving (£6,800 incorporation + £3,200 capital allowances + £4,200 pension and professional fee savings). Our fee: £220 per month. Net benefit: £11,560 per year. The largest single saving of any case study on this page.

Case Study 6: Tutoring Agency Owner With Zero Digital Records

Location: Brighton | Business: Private tutoring agency | Structure: Sole trader | Turnover: £52,000

The Problem

A sole trader running a tutoring agency matching private tutors with families across Brighton and Hove. Earning £52,000 gross (above the MTD ITSA threshold), she had been filing Self Assessment via the HMRC portal using handwritten records. No accounting software, no bank feed, no digital records. MTD ITSA from April 2026 meant she needed a complete digital transformation.

What We Found

•       No accounting software at all (handwritten ledger and paper receipts)
•       £1,200 per year in travel expenses to client homes not tracked or claimed
•       Professional development courses (£800 per year) not claimed
•       Mobile phone and home broadband (business use) not apportioned or claimed
•       Marketing costs (website hosting, social media ads) partially unclaimed
•       No pension contributions (paying higher rate on income above £50,270)

What We Did

26. Set up FreeAgent free via existing NatWest account
27. Connected bank feed and trained her on weekly reconciliation
28. Set up mobile receipt capture workflow
29. Claimed all previously missed expenses (£1,200 travel + £800 CPD + £600 phone/broadband + £400 marketing = £3,000 per year)
30. Set up personal pension contribution of £4,000 per year (reducing higher-rate exposure, saving £800)
31. Registered for MTD ITSA and filed first quarterly submission

Result: £3,800 annual saving (£3,000 expenses + £800 pension relief). Software cost: £0. Our fee: £110 per month. Net benefit: £2,480 per year. She went from handwritten ledger to fully digital MTD compliance in 2 weeks.

Case Study 7: CIS Roofer Losing Money to Incorrect Deductions

Location: Sunderland | Business: Roofing subcontractor | Structure: Sole trader (CIS) | Turnover: £68,000

The Problem

A CIS subcontractor who had been having 20% CIS deductions taken by contractors for 4 years despite qualifying for Gross Payment Status (GPS). His previous bookkeeper had never assessed GPS eligibility. Additionally, his annual Self Assessment returns were filed late 2 out of 4 years, and he had accumulated 2 MTD VAT penalty points from his bookkeeper’s late filings.

What We Found

•       Gross Payment Status eligible (met all criteria for 3+ years) but never applied
•       Losing approximately £13,600 per year in cash flow from unnecessary 20% CIS deductions
•       While CIS deductions are offset against tax liability, the cash flow impact was severe (he was borrowing to cover cash gaps)
•       2 MTD VAT penalty points from late filings by his bookkeeper
•       Vehicle expenses claimed at simplified rate when actual cost was significantly higher
•       Tool and equipment purchases not claimed via Annual Investment Allowance

What We Did

32. Applied for Gross Payment Status (approved within 4 weeks)
33. Recalculated vehicle expenses using actual cost method (£4,600 actual vs £2,700 simplified = £1,900 additional claim per year)
34. Claimed £2,700 in tool and equipment capital allowances
35. Set up FreeAgent with CIS tracking for proper PDS management
36. Took over MTD VAT submissions to prevent further penalty points
37. Mapped 12-month compliance period for penalty point reset

Result: £4,600 annual tax saving (£1,900 vehicle + £2,700 tools) plus approximately £13,600 per year in improved cash flow from GPS (no more 20% deductions held). Penalty points on track for reset. Our fee: £85 per month. Net benefit: £3,580 per year in tax savings plus transformational cash flow improvement.

Case Study 8: Remote Tech Freelancer With International Clients

Location: Cardiff | Business: Software development freelancer | Structure: Ltd company (PSC) | Turnover: £112,000

The Problem

A software developer working remotely from Cardiff for a mix of UK and international clients. Invoiced in GBP and USD. His previous accountant was not VAT-registered on his behalf despite turnover exceeding the threshold 18 months prior, creating a potential HMRC liability for back-registration. He was also extracting all income as salary through PAYE, paying maximum Income Tax and NI.

What We Found

•       Should have been VAT-registered 18 months ago (turnover crossed £90,000 threshold)
•       Potential backdated VAT liability of approximately £6,000 (18 months of output VAT minus reclaimable input VAT)
•       Salary extraction costing approximately £4,400 per year more than optimal salary plus dividends
•       No employer pension contributions (Corporation Tax relief being missed)
•       Home office costs not claimed through the company (rent, utilities, broadband apportionment)
•       International client invoices not zero-rated for VAT (outside UK services should be outside scope)

What We Did

38. Contacted HMRC to voluntarily declare the late VAT registration (reduces penalties for voluntary disclosure)
39. Registered for VAT and set up MTD VAT with correct treatment of international invoices (outside scope, not standard rated)
40. Negotiated with HMRC: backdated liability reduced to approximately £3,200 after correct international treatment applied
41. Restructured extraction to optimal salary plus dividends (saving £4,400 per year)
42. Set up employer pension contribution of £12,000 per year (saving approximately £2,280 Corporation Tax)
43. Claimed home office costs through the company (£1,220 per year)
44. Migrated to Xero with multi-currency support for USD invoicing

Result: £7,900 annual ongoing saving (£4,400 extraction + £2,280 pension + £1,220 home office). Backdated VAT issue resolved with reduced liability. Our fee: £130 per month. Net benefit: £6,340 per year. The previous accountant’s failure to VAT-register had created a ticking time bomb that we defused.

Patterns Across All 8 Case Studies

Several themes repeat across these cases:

1. Missed Expense Claims Are Universal

Every single client had legitimate expenses going unclaimed. Mileage, home office costs, professional fees, and equipment purchases are the most commonly missed. Proper accounting software with receipt capture eliminates this problem.

2. Pension Contributions Are Consistently Overlooked

6 of 8 clients had no pension strategy despite paying higher-rate tax. Employer pension contributions save Corporation Tax (for Ltd companies) and reduce Income Tax exposure (for sole traders). The tax savings from pension planning alone often exceed accountancy fees.

3. Previous Accountants Were Filing But Not Advising

Every client had a previous accountant or bookkeeper who was filing returns accurately but not proactively identifying tax savings. Compliance-only accountancy leaves money on the table. Advisory accountancy pays for itself.

4. Software Migration Unlocks Visibility

Moving from paper, spreadsheets, or desktop software to cloud accounting with bank feeds revealed previously invisible financial patterns. Real-time data enables real-time decisions.

5. The Cheapest Accountant Is The Most Expensive

Multiple clients switched from cheaper providers who were costing them thousands in missed savings. The fee comparison is misleading without the value comparison. Every client on this page pays more in accountancy fees than before but keeps significantly more money overall.

MTD Case Studies: FAQs

Are these real case studies?

Yes. The financial figures and circumstances are from real UK clients. Business names and some identifying details are changed for confidentiality. All savings figures are verified against HMRC returns and client records.

Can you guarantee similar savings for my business?

No accountant can guarantee specific savings because every business is different. What we can guarantee is a thorough review of your tax position, identification of any available savings, and proactive ongoing optimisation. Most businesses earning over £50,000 have uncaptured savings.

How much does your service cost?

Fixed monthly fees from £40 for simple MTD compliance. £80 to £300 for standard to premium packages including advisory. See our pricing guide for detailed breakdowns. Every client on this page saves more than they pay in fees.

Do I need to be a high earner to benefit?

No. Case Study 6 (tutoring agency, £52,000 turnover) saved £3,800 per year. Case Study 7 (CIS roofer, £68,000 turnover) saved £4,600. Meaningful savings exist at all income levels above the MTD threshold.

How quickly do you identify savings?

Typically within the first consultation (30 minutes, free) we can identify the main areas of potential saving. A full review within the first month of engagement confirms specific figures. Most savings in these case studies were identified and actioned within the first 4 to 6 weeks.

What if my current accountant has been filing correctly but not advising?

This is the most common situation we encounter. Correct filing and proactive advisory are different skills. You may benefit from switching to a firm that does both, or from adding an advisory service alongside your existing compliance accountant.

Can I get a free assessment of my tax position?

Yes. We offer free 30-minute MTD consultations for all UK businesses. We assess your current position and provide a written summary of potential improvements. No obligation.

Do all your clients save money?

The vast majority do. Occasionally we review a client whose previous accountant was already optimising well, and our value is in maintaining that standard with better communication and MTD-ready workflows. Even in these cases, the time savings and peace of mind have value.

Could Your Business Be Our Next Case Study?

Every case study on this page started with a free 30-minute consultation. We assessed the client’s position, identified the opportunities, and delivered measurable results. Your business could be next.

At MTD – Making Tax Digital (part of B1 Accountants, ICAEW Reg Z10zyrJ):

•       Free 30-minute tax position assessment
•       Written summary of identified savings within first month
•       Fixed monthly fees from £40
•       Average client saves 4.1x their annual accountancy fee

Serving clients across 20+ UK cities

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Email: contact@mtd-makingtaxdigital.co.uk