When procurement teams discuss supply risk in qualitative terms — “high,” “medium,” “low” — operations directors nod politely and nothing changes. When the disruption cost is expressed as ₹8.4 lakhs per week, the conversation becomes a budget line. This calculator exists to produce that number before the stoppage, not after.

The Four Cost Components Nobody Adds Up in Advance

Revenue loss is the obvious component — and the one most often underestimated. The recovery percentage is critical: a partial workaround that maintains 20% of output does not reduce revenue loss by 20% — it reduces it by 20% while keeping 100% of fixed costs running. The net impact of a partial workaround is almost always lower than intuition suggests.

Idle labour is the component most organisations fail to include entirely. If production depends on the disrupted supply and workers cannot be redeployed, their daily cost — wages, provident fund contributions, and benefits — continues irrespective of output. For labour-intensive operations, idle labour can exceed lost revenue as a cost component within three days of stoppage.

“The board asked what a one-week supply disruption would cost. Nobody had a number. Three weeks later, it happened. The actual cost was 2.3× the informal estimate.”

The Emergency Premium Multiplier

Emergency sourcing is the cost that surprises finance teams most. A 40% premium on a ₹12 lakh monthly spend applied to even one week of emergency purchasing adds ₹1.1 lakhs in pure cost premium. For specialised or certified inputs — GMP raw materials, precision-tooled components, regulatory-approved actives — emergency premiums of 80–150% are not unusual. The alternate source knows you have no leverage. The price reflects it.

Duration Is the Most Sensitive Variable

Every input in this model scales with duration — except customer penalties, which are often triggered by a fixed threshold rather than accumulating daily. The most important risk mitigation decision is therefore not emergency sourcing premium reduction — it is safety stock investment to reduce the duration over which revenue loss and idle labour accrue. A ₹5 lakh investment in safety stock that reduces average disruption duration from 14 days to 4 days at a ₹3L/day run rate saves ₹30 lakhs in expected disruption cost.