Difference in Conditions (DIC)

Difference in conditions (DIC) is a separate property policy bought alongside a primary commercial property program to cover the "difference" between what the underlying policy provides and the broader protection the insured wants. Rather than duplicating the primary coverage, a DIC form is typically written on an all-risk basis and excludes the perils already insured underneath, focusing on the gaps. In practice its most common uses are adding flood and earthquake coverage that standard forms omit, and broadening a named-peril primary policy to all-risk.

For a small or growing business, DIC matters when the standard market cannot deliver the breadth or catastrophe perils it needs at the limits required. A company in a seismic or coastal zone may find flood and quake unavailable or severely sublimited on its base policy; a DIC layer supplies those perils, often with a higher limit than the government flood program alone. DIC is frequently placed in the excess and surplus lines market, giving underwriters flexibility to tailor terms, deductibles, and catastrophe sublimits to the specific risk.

The essential nuance is coordination with the underlying insurance. Because DIC is designed to dovetail with the primary policy, mismatched valuation clauses, deductibles, or covered locations can create unexpected gaps or disputes over which policy pays. DIC deductibles for catastrophe perils are often percentage-based (a share of the insured value) rather than flat dollars, so a large earthquake or flood loss can leave a meaningful retained amount. Buyers should confirm exactly which perils and locations the DIC picks up, how its limits stack over or beside the primary, and that flood/quake sublimits are adequate — a DIC is powerful but only as good as its alignment with the coverage beneath it.