Cost Reduction Calculator — JD Fortress AI

Your Firm

Firm Name (optional)

Number of Lawyers

2 15

Number of JDF Vaults

1 10

Time Horizon (years)

1 yr 5 yrs

Total Cost (NPV)

—

initial + running, discounted

Total Savings & Revenue

—

over the time horizon

ROI Payback Period

—

to break even

Initial (incl. VAT) —

Hardware (3 vaults) —

Setup & Training —

Support/month —

Electricity/month —

Salary savings/year —

Extra billable revenue/year —

FTE hires avoided —

Extra billable hrs/month —

Time saved/lawyer/month —

Subject: Immediate ROI Opportunity – Secure On-Prem AI for Your Legal Team

Prepared for: Your Firm

	JDFSpan	JDFVault ✓	JDFTower
Hardware	Varies	£9,000	£50,000
Software Setup	£6,000	£6,000	£9,000
Ongoing Costs (Electricity + Hosting)	£3,000	£500	£1,500
Monthly Support (including VAT)	£3,000	£3,000	£9,000

The calculator above models JDFVault specifically. Comparison uses indicative product catalogue figures.

▸ Assumptions & Methodology Click to expand

All monetary values in GBP (£). These constants underpin every calculation. They are based on 2025 UK market rates and our deployment experience.

Parameter	Value	Notes
Hardware per Vault	£9,000	2026 Premium On-Prem AI Appliance (extreme memory tier, custom lockdown for zero-exposure environments
Setup — first Vault	£6,000	Professional installation, RAG pipeline config, data source integration, security audits
Setup — each additional Vault	£2,000	Incremental setup cost for each unit beyond the first
Training (one-off)	£2,000	On-site or virtual training for up to 10 users
VAT rate	20%	UK standard rate applied to initial costs
Electricity per Vault / month	£44.80	Based on 800W average load × 160 hrs/month × £0.35/kWh
Support — flat rate (1–3 Vaults) / month	£3,000	Covers 1, 2, or 3 Vaults at the same price — same effort to monitor 1 machine as 3
Support — each additional Vault (4+) / month	£1,000	Per Vault per month beyond the first three
Discount rate (NPV)	5%	Applied to future running costs to calculate net present value
Productivity multiplier	1.2×	Your lawyers, powered by fortress-secure AI, operate at 1.2× productivity
Working hours / month	160	8 hours/day × 20 working days
Freed-hour recoup rate	50%	Proportion of freed-up time that converts to billable hours (the rest is admin, breaks, etc.)
Avg. lawyer salary / year	£85,000	Mid-level UK solicitor; includes benefits & overheads at 1.5× base
Hiring cost per FTE	£10,000	Recruitment fees + onboarding cost
Billing rate per hour	£300	Client-facing hourly rate