Compute Accounting Manager

Compute Accounting Manager

When to Use

• Classify capex vs OpEx for servers, GPUs, networking, and data center equipment
• Set up depreciation and asset register for compute fixed assets
• Map cloud provider bills and usage files to GL accounts and cost centers
• Amortize reserved instances, Savings Plans, committed use, and cloud prepaids
• Build chargeback or showback from compute meters to products or business units
• Accrue colo, hardware, and uninvoiced cloud usage at month-end
• Reconcile subledgers (cloud, asset, prepaid) to GL and explain flux
• Support audit PBCs for compute-related balances and capitalization memos

Operational cloud optimization, CUR analytics, and RI recommendations → finops-analyst. Multi-year TCO/NPV and commit portfolio business cases → cloud-economist.

When NOT to Use

• SaaS revenue recognition, deferred revenue, ARR → senior-revenue-accountant
• Rack utilization, stranded kW, refresh planning → data-center-compute-supply-efficiency
• Terraform, VPC, K8s platform design → infrastructure-engineer
• Order form, CRM-to-billing operational handoff → deal-operations-administrator
• MSA/contract redlines → commercial-counsel
• BI dashboards without ledger tie-out → bi-analyst

Related skills

Core Workflows

1. Cost classification (capex vs OpEx)

Policy, thresholds, useful life, project vs BAU.

See `references/cost_classification_capex_opex.md`.

2. Cloud cost to GL

CUR/billing mapping, credits, prepaid amortization.

See `references/cloud_cost_gl_mapping.md`.

3. Fixed assets and depreciation

Asset register, additions, disposals, impairments.

See `references/fixed_asset_compute.md`.

4. Chargeback and showback

Allocation keys, internal rates, stakeholder reporting.

See `references/chargeback_showback.md`.

5. Month-end close

Reconciliations, accruals, flux commentary.

See `references/month_end_reconciliation.md`.

6. Vendor and invoice controls

Colo, OEM, distributor; three-way match and accruals.

See `references/vendor_invoice_controls.md`.

Outputs

• Capitalization memo — facts, policy cite, asset life, in-service date
• Account mapping table — service/SKU/tag → GL, department, product
• Amortization schedule — prepaid cloud or capitalized implementation
• Reconciliation workbook — subledger to GL, reconciling items
• Flux narrative — drivers for MoM compute COGS or prepaid movement
• Chargeback statement — units, rate, allocated amount by consumer

Principles

• Substance over label — classify by nature (asset vs period cost), not vendor line names alone
• Single source of meters — align FinOps dashboards to the same tags used in GL allocation
• Document judgments — capitalization, useful life changes, and material estimates
• Not tax or legal advice — escalate ASC 842 leases, transfer pricing, and tax treatment to qualified advisors
• Coordinate with engineering — in-service dates and decommissions must match asset records

Chargeback and showback

Table of contents

1. Showback vs chargeback 2. Allocation keys 3. Rate design 4. Governance

Showback vs chargeback

Pick mode per company policy and system capability (ERP intercompany modules).

Allocation keys

For shared compute (K8s cluster, shared GPU pool, corporate networking):

Document hierarchy: direct tagged spend first → allocate remainder of shared pool.

Rate design

Internal rates may include:

• Variable — per vCPU-hour, per GPU-hour, per GB-month
• Fixed platform fee — amortized platform engineering and shared tools
• Pass-through — reserved capacity at amortized cost + uplift (policy)

Refresh rates quarterly or when unit economics shift materially.

Reconcile total charged to total compute GL expense ± intentional subsidy (document executive approval).

Governance

• Publish dictionary of cost pools and tags
• Freeze allocation rules before month-end close
• Escalate disputes to FinOps + accounting DRI
• Do not use chargeback to bypass capex approval for hardware purchases

Cloud cost to GL mapping

Table of contents

1. Data sources 2. Mapping dimensions 3. Prepaid and commitments 4. Credits and adjustments

Data sources

Reconcile invoice total to sum of allocated CUR ± timing (enterprise support, tax lines).

Mapping dimensions

Build mapping rules in priority order:

1. Account / subscription — default GL by payer account 2. Tag — cost_center, product, environment (prod vs non-prod) 3. Service / SKU — e.g., EC2, GKE, Blob → natural account 4. Resource group or project — for committed structure

Prod vs non-prod — separate R&D vs COGS where policy requires.

Prepaid and commitments

Track unamortized balance monthly; tie to cloud console commitment reports.

Credits and adjustments

• Provider credits — reduce expense or prepaid per nature (promo vs SLA credit)
• Enterprise Discount Program — allocate consistently with usage mapping
• Refunds — reverse AP and expense or adjust prepaid
• FX — invoice currency vs functional currency; document rate source

Log non-recurring items separately in flux commentary.

Cost classification (capex vs OpEx)

Table of contents

1. Decision framework 2. Common categories 3. Documentation

Decision framework

Cloud usage (compute hours, storage GB-month) → typically OpEx COGS or hosting expense.

Purchased servers/GPUs for owned or colo deploy → typically capex → fixed asset.

Implementation labor — follow company policy (capitalize eligible costs vs expense).

Common categories

Documentation

Capitalization memo should include:

• Description and business purpose
• Invoice or PO reference
• In-service date and location (site/account)
• Useful life and depreciation method
• Policy paragraph or precedent
• Approver (controller or delegate)

Fixed assets and depreciation

Table of contents

1. Asset register fields 2. Lifecycle events 3. Depreciation methods 4. Disposal and impairment

Asset register fields

Minimum fields per compute asset:

Lifecycle events

1. Pending — PO placed, not in service 2. In service — start depreciation 3. Transfer — site or cost center change; update tags and allocation 4. Partial upgrade — capitalize if new component meets threshold; else OpEx 5. Retired — stop depreciation; disposal workflow

Align in-service with engineering (not merely received at dock unless policy says otherwise).

Depreciation methods

Run monthly depreciation journal; tie subledger to GL.

Disposal and impairment

Disposal:

• Remove cost and accumulated depreciation
• Record gain/loss on sale or scrap
• Retire serial from inventory/asset system

Impairment indicators:

• Long idle with no redeploy plan
• Obsolete generation (e.g., GPU end-of-life)
• Physical damage

Document impairment test per GAAP/IFRS policy; controller approval.

Month-end reconciliation

Table of contents

1. Close calendar 2. Standard reconciliations 3. Accruals 4. Flux analysis

Close calendar

Typical compute accounting tasks (align to company close day):

Standard reconciliations

Each reconciliation: preparer, reviewer, threshold for investigation.

Accruals

Accrue when goods/services received but invoice not yet booked:

• Cloud usage after last invoice cut (usage accrual from CUR)
• Colo MRC for current month
• Hardware received not invoiced (GRNI)
• Estimated vendor credits not yet applied

Reverse automatically next period when invoice hits.

Flux analysis

Explain material MoM changes:

Link flux to business metrics (nodes deployed, customers) when possible.

Vendor and invoice controls

Table of contents

1. Vendor types 2. Three-way match 3. Common issues 4. Controls

Vendor types

Three-way match

For hardware capex:

1. PO — approved amount, capex project code 2. Receipt — serials, quantity, in-service trigger 3. Invoice — match to PO; capitalize to asset or inventory

For cloud:

• Match enterprise agreement or account master to invoice
• Validate payer account list vs approved subscriptions

Common issues

Controls

• Segregation — approver ≠ preparer for capex over threshold
• Master data — GL and cost center on PO required
• Tag policy — block close on untagged prod spend above limit (if automated)
• Asset disposal — dual approval before GL retirement
• PBC retention — invoices, capitalization memos, reconciliation sign-offs

Route lease classification and sales/use tax on equipment to tax/legal per policy.