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Energy Audit ROI Estimator

Spend a few minutes here before you spend a few lakh on an audit. See realistic payback, NPV, IRR and 10-year cumulative savings — calibrated to Indian industry and commercial-building averages.

Inputs

Result

Annual savings (Year 1)
₹12.0 L
Simple payback
0.7yrs
IRR
144.5%
10-year cumulative savings
₹1.51 Cr
NPV @ 10%
₹80.7 L
Upfront investment
₹8.6 L (audit ₹5.0 L + retrofit ₹3.6 L)
Estimated carbon savings: 82 tonnes CO₂/year (assumes ₹10.5/kWh avg tariff, 0.72 kg CO₂/kWh India grid)

How this works

This tool models the cashflow of an energy audit plus its identified retrofits:

Annual savings (Year 1) = Annual bill × Savings %
Upfront = Audit cost + Implementation cost

Year-N savings = Year-1 savings × (1 + tariff escalation)^(N-1)
NPV = -Upfront + Σ (Year-N savings / (1 + discount rate)^N)
IRR = discount rate at which NPV = 0

Simple payback ignores escalation and discounting. NPV and IRR are the right numbers when you are competing for capital against other projects. For anything over ₹50 lakh retrofit, always present the NPV and IRR.

Typical audit savings by facility type

First-audit savings ranges from BEE PAT data, industry benchmarks, and ASHRAE guidance. Second and third audits find less.

Facility typeTypical savingsBiggest opportunity area
Manufacturing (discrete)10–15%Motors, compressed air, HVAC
Process industry6–10%Heat recovery, steam system
Hospital10–15%HVAC, hot water, OT sterilisation
Hotel12–18%HVAC, lighting, hot water
Commercial office15–22%HVAC scheduling, lighting, plug loads
Data centre5–8%PUE optimisation, cooling setpoints
Warehouse / logistics15–25%LED conversion, HVAC zoning

Worked example — pharma manufacturing

Large pharma plant, ₹12 crore annual electricity bill. Commissioning a Level 2 energy audit.

  • Audit identifies 10% savings opportunity: ₹1.2 cr/year (Year 1)
  • Audit cost: ₹5 lakh
  • Implementation cost: ₹36 lakh (30% of identified savings)
  • Total upfront: ₹41 lakh
  • Simple payback: 4.1 months ✓
  • 10-year NPV @ 10% discount, 5% tariff escalation: ₹8.7 crore
  • IRR: approximately 295%
  • Carbon saved: ~830 tonnes CO₂/year

The numbers sound unrealistic until you realise energy audits typically find savings the CFO has been paying for every month for years. The ROI is not about the audit finding new savings — it is about unlocking savings that were already possible.

Why most audits under-deliver (and how to fix it)

Audit reports promise 15% savings. Year-two invoices show 3%. What happens in between?

  • No sub-metering = no way to verify the savings, so they cannot be defended when they backslide
  • Operators revert to old setpoints the week after the auditor leaves
  • The meter was temporary — pulled out after the 4-week audit window, so the facility is blind again
  • No accountability loop — nobody is comparing actual to predicted consumption each month

Titan Audit is built to stay after the audit ends. Same Class 0.5S metering engine, split-core CTs that deploy in 2 minutes without downtime, and an app that generates branded PDF audit reports without a laptop. When the audit finishes, leave the meter installed and connect it to the Energy Intelligence Platform for continuous M&V. Same hardware, no second purchase, no swap-out. See the Energy Audit solution for the full workflow.

Our ESCO customers particularly benefit: the audit hardware becomes the M&V hardware becomes the performance-contract monitoring hardware. One device, three revenue events.

Frequently asked questions

Six questions on audit scope, BEE PAT compliance, and making savings stick.

Level 1 (walk-through, 5–10% identified savings): operational fixes, setpoint adjustments, scheduling — no capex. Level 2 (standard audit, 10–20% savings): detailed energy analysis, sub-metering of major systems, identification of low/medium-cost retrofits. Level 3 (investment-grade, 15–25%+): detailed engineering and financial analysis, ready for capital approval — typically required for ESCO contracts and financed retrofits. BEE PAT generally aligns with Level 2 expectations.
For BEE-designated consumers (DCs) under the Perform-Achieve-Trade (PAT) scheme, yes — a BEE Accredited Energy Auditor must conduct the audit once per PAT cycle (typically 3 years). This covers large industrial units in aluminium, cement, chlor-alkali, fertiliser, iron and steel, paper, power, textiles, railways, refineries, and distribution companies. Many state DC thresholds start at 2,500 tonnes of oil equivalent (TOE)/year. Commercial buildings under ECBC-compliant state rules may also have triennial audit requirements.
BEE PAT Cycle IV achieved an average SEC reduction of 6.8% across 478 designated consumers — your mileage will vary by current maturity. Typical first-audit savings: process industry 6–10%, discrete manufacturing 10–15%, hotels 12–18%, hospitals 10–15%, commercial offices 15–22%, warehouses 15–25% (biggest opportunities are lighting + HVAC scheduling), data centres 5–8% (already optimised). Facilities that have never been audited routinely find 15%+; mature operations with continuous monitoring find 3–5%.
Yes — but they require management attention, not magic. Typical examples: turning off compressed-air leaks (often 10–30% of compressed-air cost), fixing VFD bypasses where motors run at full speed on throttled flow, correcting chiller sequencing, tightening HVAC setpoints, killing vampire loads on weekends. These typically deliver 40–60% of total identified savings with payback under 12 months. The catch: without continuous monitoring, savings backslide within 6–18 months as operators revert. That is the real argument for continuous metering post-audit.
Every 3 years minimum (BEE PAT cycle) for large industry. For commercial buildings, every 3–5 years. The bigger question is continuous M&V (measurement and verification) — a proper energy management system with permanent sub-metering catches drift in weeks rather than years, making re-audits a formality instead of a rediscovery exercise.
Yes. Titan Audit is a portable-plus-permanent energy logger designed for exactly this use case. Clamp on with split-core CTs, log for 1–4 weeks, generate PDF reports from the phone app. A facilities engineer with basic electrical training can deploy it. For Level 2/3 audits you still want an accredited energy auditor, but Titan Audit provides the defensible Class 0.5S measurement data their report relies on. Post-audit, leave the meters installed for continuous M&V — same hardware, same dashboard.

Related products & solutions

The measurement stack that makes audit savings durable, not aspirational.

Titan Audit — Energy Logger

Split-core CT energy logger. Deploy in 2 min, no shutdown. PDF reports from phone. Stays after the audit.

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Energy Audit Solution

BEE PAT and ASHRAE Level 2/3 audits with audit-to-subscription M&V path.

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Energy Efficiency Solution

What happens after the audit — continuous monitoring to cut factory electricity 10–25%.

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Ready to audit — and keep the savings?

Talk to our team about BEE PAT, ASHRAE Level 2/3, or ESCO engagements.

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