Speed Limiter ROI Calculator: Real Examples from UK Fleets
Speed Limiter ROI Calculator: Real Examples from UK Fleets
Understanding the return on investment from speed limiters requires moving beyond headline claims to worked numbers. This guide provides three detailed ROI calculations for UK fleets of different sizes — a small van fleet, a medium HGV fleet, and a large mixed fleet — showing itemised costs and savings, payback periods, and three-year and five-year returns.
The figures used are based on AutoKontrol’s experience across thousands of fleet deployments over 30 years. Individual fleet results will vary, and AutoKontrol can provide a bespoke ROI calculation for your specific fleet.
How to Read These Examples
Each worked example follows the same structure:
- Fleet profile — vehicle types, fleet size, annual mileage
- Investment costs — hardware, installation, subscriptions
- Annual savings — fuel, insurance, tyres, maintenance, compliance costs avoided
- Payback calculation — months to break even
- 3-year and 5-year ROI — total return over the investment period
All figures are based on:
- Average diesel price: 142p per litre (2025 average)
- Average fuel consumption improvement: 10–12% (conservative estimate)
- Insurance premium reduction: 8–15% (based on insurer feedback)
- Tyre cost reduction: 6–10%
- Speed limiter hardware cost: System 80 (HGV/PSV) or TrackSpeed unit
- Installation cost: SGH Connect standard rates
Example 1: Small Fleet — 10 Vans (LCV)
Fleet Profile
| Parameter | Detail |
|---|---|
| Fleet size | 10 vans (3.5t LCVs) |
| Annual mileage per vehicle | 25,000 miles |
| Total annual mileage | 250,000 miles |
| Current average fuel consumption | 32 mpg |
| Current annual fuel spend | £32,800 |
| Current insurance premium | £18,500 per year |
Investment Costs
| Item | Cost |
|---|---|
| TrackSpeed hardware (10 units) | £2,500 |
| Installation by SGH Connect (10 vehicles) | £1,800 |
| TrackSpeed subscription (10 vehicles, Year 1) | £2,400 |
| Total Year 1 Investment | £6,700 |
| Year 2+ (subscription only) | £2,400 per year |
Annual Savings
| Saving Category | Calculation | Annual Saving |
|---|---|---|
| Fuel (10% improvement) | £32,800 x 10% | £3,280 |
| Insurance premium reduction (10%) | £18,500 x 10% | £1,850 |
| Tyre cost reduction (8%) | £6,200 x 8% | £496 |
| Reduced maintenance (brakes, drivetrain) | Conservative estimate | £600 |
| Avoided compliance fines | 1–2 PCNs/fines avoided | £400 |
| Total Annual Saving | £6,626 |
Payback and ROI
| Metric | Figure |
|---|---|
| Total Year 1 investment | £6,700 |
| Total Year 1 saving | £6,626 |
| Payback period | 12.1 months |
| Year 2 net saving (savings minus subscription) | £4,226 |
| 3-Year total saving | £17,478 |
| 3-Year total cost | £11,500 |
| 3-Year net ROI | £5,978 (52% return) |
| 5-Year total saving | £29,930 |
| 5-Year total cost | £16,300 |
| 5-Year net ROI | £13,630 (84% return) |
Note: For a 10-van fleet, the numbers are meaningful but the biggest driver of ROI is often not fuel — it is a single avoided accident. A minor RTA involving a commercial vehicle can cost £5,000–£50,000 in total when insurance excess, downtime, replacement vehicle hire, driver time, and reputational cost are included. Speed limiters reduce accident frequency materially.
Example 2: Medium Fleet — 50 HGVs
Fleet Profile
| Parameter | Detail |
|---|---|
| Fleet size | 50 HGVs (18t–44t) |
| Annual mileage per vehicle | 80,000 miles |
| Total annual mileage | 4,000,000 miles |
| Current average fuel consumption | 8.5 mpg |
| Current annual fuel spend | £840,000 |
| Current insurance premium | £185,000 per year |
| Current tyre spend | £95,000 per year |
Investment Costs
| Item | Cost |
|---|---|
| System 80 hardware (50 units) | £22,500 |
| TrackSpeed hardware (50 units) | £12,500 |
| Installation by SGH Connect (50 vehicles) | £18,000 |
| TrackSpeed subscription (50 vehicles, Year 1) | £12,000 |
| Total Year 1 Investment | £65,000 |
| Year 2+ (subscription only) | £12,000 per year |
Annual Savings
| Saving Category | Calculation | Annual Saving |
|---|---|---|
| Fuel (11% improvement) | £840,000 x 11% | £92,400 |
| Insurance premium reduction (12%) | £185,000 x 12% | £22,200 |
| Tyre cost reduction (9%) | £95,000 x 9% | £8,550 |
| Reduced maintenance (brakes, drivetrain, clutch) | Conservative estimate | £12,000 |
| DVSA compliance — avoided prohibition costs | 2–3 avoidances | £8,000 |
| Reduced accident costs (2 fewer incidents) | £8,000 average per incident | £16,000 |
| Total Annual Saving | £159,150 |
Payback and ROI
| Metric | Figure |
|---|---|
| Total Year 1 investment | £65,000 |
| Total Year 1 saving | £159,150 |
| Payback period | 4.9 months |
| Year 2 net saving (savings minus subscription) | £147,150 |
| 3-Year total saving | £465,450 |
| 3-Year total cost | £89,000 |
| 3-Year net ROI | £376,450 (423% return) |
| 5-Year total saving | £759,750 |
| 5-Year total cost | £113,000 |
| 5-Year net ROI | £646,750 (572% return) |
Key insight: At 50 HGVs, fuel saving alone justifies the entire investment in under 5 months. Every other saving category — insurance, tyres, maintenance, compliance — is additional return on top of the primary fuel case.
Example 3: Large Fleet — 200+ Mixed Vehicles
Fleet Profile
| Parameter | Detail |
|---|---|
| Fleet size | 220 vehicles (80 HGVs, 90 LCVs, 50 cars/SUVs) |
| HGV annual mileage | 75,000 miles per vehicle |
| LCV annual mileage | 30,000 miles per vehicle |
| Car/SUV annual mileage | 20,000 miles per vehicle |
| Annual fuel spend (HGVs) | £1,620,000 |
| Annual fuel spend (LCVs) | £283,000 |
| Annual fuel spend (cars) | £88,000 |
| Total annual fuel spend | £1,991,000 |
| Annual insurance premium | £420,000 |
| Annual tyre spend | £210,000 |
Investment Costs
| Item | Cost |
|---|---|
| System 80 + TrackSpeed (80 HGVs) | £63,200 |
| TrackSpeed + GeoKontrol (90 LCVs) | £31,500 |
| TrackSpeed monitoring (50 cars) | £10,000 |
| SGH Connect installation (220 vehicles) | £58,000 |
| TrackSpeed subscriptions Year 1 (220 vehicles) | £46,200 |
| System configuration, zone mapping (GeoKontrol) | £4,500 |
| Total Year 1 Investment | £213,400 |
| Year 2+ (subscriptions only) | £46,200 per year |
Annual Savings
| Saving Category | Calculation | Annual Saving |
|---|---|---|
| HGV fuel (12% improvement) | £1,620,000 x 12% | £194,400 |
| LCV fuel (10% improvement) | £283,000 x 10% | £28,300 |
| Car fuel (6% improvement) | £88,000 x 6% | £5,280 |
| Insurance premium reduction (13%) | £420,000 x 13% | £54,600 |
| Tyre cost reduction (9%) | £210,000 x 9% | £18,900 |
| Maintenance reduction (brakes, drivetrain) | Conservative across fleet | £38,000 |
| DVSA/regulatory compliance savings | Avoided prohibitions, fines | £22,000 |
| Reduced accident costs (8 fewer incidents) | £9,000 average per incident | £72,000 |
| HR/management time (fewer incidents to manage) | Conservative estimate | £15,000 |
| Total Annual Saving | £448,480 |
Payback and ROI
| Metric | Figure |
|---|---|
| Total Year 1 investment | £213,400 |
| Total Year 1 saving | £448,480 |
| Payback period | 5.7 months |
| Year 2 net saving (savings minus subscriptions) | £402,280 |
| 3-Year total saving | £1,299,240 |
| 3-Year total cost | £305,800 |
| 3-Year net ROI | £993,440 (325% return) |
| 5-Year total saving | £2,103,800 |
| 5-Year total cost | £398,200 |
| 5-Year net ROI | £1,705,600 (428% return) |
Summary Comparison Table
| Small Fleet (10 vans) | Medium Fleet (50 HGVs) | Large Fleet (220 mixed) | |
|---|---|---|---|
| Year 1 investment | £6,700 | £65,000 | £213,400 |
| Annual saving | £6,626 | £159,150 | £448,480 |
| Payback period | 12 months | 5 months | 6 months |
| 3-year net ROI | £5,978 | £376,450 | £993,440 |
| 5-year net ROI | £13,630 | £646,750 | £1,705,600 |
| 5-year ROI % | 84% | 572% | 428% |
Key observation: Larger fleets deliver faster payback periods and dramatically higher absolute returns. However, even a 10-van fleet achieves full payback within 12 months, making speed limiters financially sound at every scale.
Savings Not Included in These Calculations
The calculations above take a conservative approach. Several categories of saving are not included, but are real:
- Criminal record protection for drivers: A speed limiter demonstrably reduces the risk of a speeding-related driving conviction — the financial and reputational cost of which can be severe
- Reputational damage avoidance: A single media story about a commercial vehicle speeding can cost far more than a fleet deployment
- Contract eligibility: FORS Gold, TfL contracts, and certain insurance policies require speed limiting — the value of retained contracts is not in these numbers
- Carbon reporting: Speed limiters reduce fuel consumption and therefore CO2 emissions — increasingly valuable for ESG reporting and scope 3 supply chain requirements
Get Your Bespoke ROI Calculation
Every fleet is different. AutoKontrol can model your specific savings potential based on:
- Your exact fleet composition and vehicle types
- Current fuel spend and average consumption data
- Annual mileage by vehicle category
- Current insurance premiums
- Your specific compliance requirements (DVSA, FORS, TfL, etc.)
Our 30-year experience means we can provide realistic, evidenced projections — not optimistic marketing claims.
Get a quote and bespoke ROI calculation
For more on the financial case, read our full speed limiter ROI guide, explore fuel savings from speed limiters in detail, or understand how speed limiters affect insurance premiums.
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