Storage Interest Calculator
From average inventory, storage period, interest rate and storage costs, get inventory interest, turnover rate, storage cost rate and monthly and annual costs.
Storage Interest
€500.00
for 45 days
Interest / Day
€11.11
Inventory Turnover
8.0x
per year
Storage Cost Rate
2.50 %
Formula: Storage interest = Avg. inventory x Rate x Days / 360
Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.
FAQ
Frequently Asked Questions
What is the warehouse interest rate?
Warehouse interest represents the cost of capital tied up in inventory. It is calculated as average inventory value times market interest rate divided by 100. High inventory ties up capital that could be invested elsewhere.
How can I reduce warehouse costs?
Optimize inventory turnover through just-in-time delivery, ABC analysis, accurate demand forecasting, and reducing slow-moving stock. Higher turnover means lower capital commitment.
Are my entered amounts stored anywhere?
No. All calculations happen exclusively in your browser. Your inputs are never sent to our server or stored. You can safely enter sensitive financial data.
Guide
What is the Storage Interest Calculator?
The warehousing cost calculator computes the capital carrying cost for goods held in stock. It shows the costs arising from holding inventory.
How does the Storage Interest Calculator work?
Enter the average inventory value (in euros), warehousing interest rate and storage period. Warehousing cost = average inventory * rate * storage days / 360. The calculator also determines the inventory turnover rate.
Key Data and Facts
Warehousing rate = market rate / 360 * average storage period. Inventory turnover = cost of goods sold / average inventory. High turnover = low warehousing costs.
Step-by-Step Guide
How to calculate inventory carrying interest step by step: 1. Determine the average inventory: (opening stock + closing stock) / 2, valued at cost price. 2. State the market interest rate (imputed interest rate): often the bank's overdraft rate or an imputed interest rate (e.g. 5-8 %) is used. 3. Calculate the average storage period: storage period = 360 / inventory turnover frequency. 4. Calculate the inventory turnover frequency: cost of goods sold / average inventory. 5. Calculate the inventory interest rate: market interest rate x average storage period / 360. 6. Calculate the inventory carrying interest: average inventory x inventory interest rate / 100. Example: average inventory 120,000 EUR, cost of goods sold 480,000 EUR/year, market interest rate 6 %. Inventory turnover: 480,000 / 120,000 = 4x per year. Average storage period: 360 / 4 = 90 days. Inventory interest rate: 6 % x 90 / 360 = 1.5 %. Inventory carrying interest: 120,000 x 1.5 % = 1,800 EUR/year. Measure: with an inventory turnover of 6x: storage period 60 days, interest rate 1.0 %, interest only 1,200 EUR – a saving of 600 EUR.
Calculation Example
Average inventory 120,000 EUR, cost of goods sold 480,000 EUR/year, 6% market interest rate. Inventory turnover: 4x. Average storage period: 90 days. Inventory interest rate: 1.5%. Inventory interest: 1,800 EUR/year.
Sources
Official sources
Calculations are based on applicable German laws and official data:
- Deutsche Bundesbank
- Bundesanstalt für Finanzdienstleistungsaufsicht (BaFin)
- Statistisches Bundesamt (Destatis)
Full methodology at Methodology.
Reviewed by Konstantin Iakovlev · Last updated:
Finance
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