This guide walks through exactly how to do that, step by step.
What ASC 606 Requires for Commission Costs
ASC 340-40 (the companion standard to ASC 606) says that incremental costs of obtaining a contract — like sales commissions — must be capitalized as an asset and amortized over the period the entity expects to benefit from the contract.
The key criteria:
- The cost is incremental — it wouldn’t have been incurred without the contract (sales commissions qualify; base salary doesn’t)
- The cost is expected to be recovered — through future revenue from the contract
- The contract term exceeds 12 months — otherwise you can use the practical expedient and expense immediately
The Practical Expedient (When You Can Skip Capitalization)
If the amortization period would be 12 months or less, ASC 340-40-25-4 allows you to expense the commission immediately. This is the practical expedient, and most companies use it for:
- Month-to-month contracts
- Annual contracts with no expected renewal premium
- Short-term professional services engagements
If all your contracts are annual or shorter, you may not need to capitalize at all. But if you have multi-year deals — especially common in SaaS — keep reading.
Step 1: Identify Commissions to Capitalize
Pull your commission payment data and classify each deal:
| Deal | Contract Term | Commission | Amortization Type |
|---|---|---|---|
| Acme Corp | 36 months | $15,000 | Contract Term |
| Beta Inc | 6 months | $3,000 | Immediately Expensed |
| Gamma LLC | 24 months | $8,000 | Estimated Benefit Period |
- Contract Term: Amortize over the contract length (most common)
- Estimated Benefit Period: Amortize over the expected customer relationship, including renewals (requires judgment)
- Immediately Expensed: Practical expedient for contracts ≤ 12 months
Step 2: Calculate Monthly Amortization
For straight-line amortization (which is what most companies use):
Monthly Amortization = Commission Amount ÷ Amortization Period (months)
Example: $15,000 commission on a 36-month contract = $416.67/month
Step 3: Build Your Amortization Schedule
You need a month-by-month waterfall showing:
- Each deal’s starting balance
- Monthly amortization amount
- Remaining deferred commission asset
This is where Excel gets tedious fast. For 10 deals, it’s manageable. For 50+, you need a structured workbook with dynamic period selection — not a manual spreadsheet you rebuild every month.
Step 4: Generate Journal Entries
Each period, you’ll book two (or three) types of journal entries:
Capitalization Entry (new commissions)
DR Deferred Commission Asset $15,000
CR Cash / Accrued Commissions $15,000
Amortization Entry (monthly expense)
DR Commission Expense (Amortization) $416.67
CR Deferred Commission Asset $416.67
Immediate Expense Entry (practical expedient deals)
DR Commission Expense $3,000
CR Cash / Accrued Commissions $3,000
Step 5: Reconcile and Prepare the Rollforward
Your auditors will want a rollforward schedule showing:
| Amount | |
|---|---|
| Beginning Deferred Commission Balance | $XX,XXX |
| + New Capitalizations | $XX,XXX |
| − Amortization Expense | ($X,XXX) |
| = Ending Deferred Commission Balance | $XX,XXX |
This needs to tie to your general ledger balance. If it doesn’t, you have a reconciliation issue to investigate before close.
Common Mistakes
- Capitalizing base salary — only incremental costs qualify. If the rep gets paid regardless of the deal, it’s not incremental.
- Using the wrong amortization period — contract term vs. estimated benefit period is a policy election. Be consistent and document your rationale.
- Forgetting deal amendments — if a contract is extended or modified, you may need to adjust the remaining amortization.
- No reconciliation process — if your JE amounts don’t tie to your amortization schedule, you’ll find out during the audit. Don’t wait.
The Excel Problem
Most finance teams start with a manual spreadsheet. It works for 5-10 deals. Then the contract base grows, deals renew, amendments happen, and suddenly you’re spending hours every month maintaining a fragile workbook that nobody else can follow.
The options are usually:
- Keep the manual spreadsheet and accept the risk
- Buy commission accounting software ($30k–$100k+/year)
- Use a structured Excel workbook that handles the complexity without the software price tag
If you’re in the “too many deals for manual, too early for enterprise software” zone — that’s exactly what we built.
Get the Workbook
Our ASC 606 Commission Accrual Workbook handles everything in this guide:
- 50-deal capacity with three amortization methods
- Automated journal entries with GL account mapping
- Month-by-month amortization waterfall with dynamic period selection
- Rollforward schedule that ties to your amortization detail
- Reconciliation tab — all variances should show $0
- No macros — pure Excel formulas, works everywhere
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