# Cost Accounting

> Apply cost accounting methods to understand product/service costs, margins, and cost behavior for pricing and profitability decisions. Use when analyzing product margins, allocating overhead, or improving cost visibility.

- Skill: `itsual/cost-accounting` (Agent Skill)
- Install (CLI): `npx skillmds@latest add itsual/cost-accounting`
- Raw SKILL.md: https://api.skillmd.com/api/skills/itsual/cost-accounting/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Finance & Business
- Author: itsual (https://skillmd.com/u/itsual)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/itsual/cost-accounting

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# Cost Accounting

## Overview

Cost accounting assigns costs to products, services, or activities so leaders can price, prioritize, and improve profitability with facts.

## When to Use

- Product or SKU margin analysis
- Overhead allocation design
- Make-vs-buy decisions
- Cost reduction prioritization

## Core Practices

- Distinguish direct vs indirect costs
- Choose allocation bases that reflect causality where possible
- Understand absorption vs variable costing impacts
- Review cost standards and variances in manufacturing contexts
- Refresh allocations as the business mix changes

## Principles

- All allocation methods are imperfect — be transparent
- Decision-relevant cost may differ from full absorption cost
- Precision on immaterial allocations wastes time
- Operational partners must trust the cost model enough to use it

## Verification

- [ ] Cost objects and direct costs are clear
- [ ] Allocation logic is documented
- [ ] Margin reports are used in decisions