Excel 365: Build an ASC 606 Contract Modification Engine That Auto-Classifies and Calculates Catch-Up Adjustments

Wed, 26 Aug 2026 03:17:00 +0530

Who this quietly bites

Separate contract — if the new goods are distinct AND the price is commensurate with standalone selling prices.
Prospective — if goods are distinct but the price isn’t commensurate.
Cumulative catch-up — if the goods aren’t distinct at all.

Here’s the problem: most finance teams classify these in email threads, sticky notes, or separate Word docs. The amortization schedule gets rebuilt manually in a new tab. Six months later, no one remembers why the numbers changed — and the catch-up adjustment that surprises the CFO in Q3 was actually a Q1 modification that was never properly documented.

"Contract-Modification" on Ask Eijaz

Excel 365: Build an ASC 606 Contract Modification Engine That Auto-Classifies and Calculates Catch-Up Adjustments

Who this quietly bites