Calculator Inputs
Example Data Table
| Department | Driver Units | Direct Cost | Allocated Overhead | Total Cost |
|---|---|---|---|---|
| Production | 450 | 18,000 | 9,000 | 27,000 |
| Assembly | 300 | 12,500 | 6,000 | 18,500 |
| Packaging | 250 | 9,400 | 5,000 | 14,400 |
| Logistics | 200 | 7,200 | 4,000 | 11,200 |
Formula Used
Single Rate Allocation: Allocated Cost = Department Driver Units × (Total Cost Pool ÷ Total Driver Units)
Dual Rate Allocation: Allocated Cost = (Department Driver Units × Fixed Rate) + (Department Driver Units × Variable Rate)
Base share equals department driver units divided by total driver units. Full cost equals direct cost plus allocated shared cost. Cost per base unit equals full cost divided by department driver units.
How to Use This Calculator
- Choose single rate or dual rate allocation.
- Enter the shared cost pool and driver totals.
- Fill each department name, allocation base, and direct cost.
- Click calculate to show the results above the form.
- Review rates, allocated overhead, and full cost by department.
- Export the results as CSV or PDF for reporting.
FAQs
1. What is cost allocation?
Cost allocation assigns shared expenses to departments, products, or services using a logical driver. It helps businesses measure profitability, compare performance, and support pricing or budgeting decisions more accurately.
2. When should I use a single rate method?
Use a single rate when one broad driver reasonably explains shared costs. It is simpler, easier to maintain, and useful when fixed and variable overhead do not need separate treatment.
3. Why would a dual rate method help?
A dual rate method separates fixed and variable costs. This often improves decision quality because departments see how capacity costs differ from usage-based costs.
4. What are good allocation bases?
Common bases include labor hours, machine hours, square footage, units processed, service tickets, or headcount. The best driver reflects how the shared cost is actually consumed.
5. Does allocation change total company cost?
No. Allocation only redistributes shared costs among departments or products. The company’s total cost stays the same, but visibility into where costs belong becomes clearer.
6. Can this calculator support budgeting?
Yes. You can test different driver assumptions, compare departments, and estimate how future capacity or usage changes may shift allocated overhead during budget planning.
7. What does cost per base unit show?
It shows the combined direct and allocated cost for each driver unit. This helps evaluate process efficiency, internal pricing, and department-level cost intensity.
8. Can I use this for product costing?
Yes. Replace departments with products, jobs, or service lines. Then use a suitable driver, such as machine hours or activity counts, to distribute shared overhead consistently.