Beginning Inventory: How to Calculate It + Beginning Inventory Formula
September 11, 2020
If you start out a quarter with more inventory than when you started the previous quarter, is it a good thing or a bad thing?
It could mean you stocked up in preparation for a big sale or rise in demand. Or, it’s an indication that you have more inventory than you can sell.
If you start out with less inventory than the period prior, it could mean you sold a lot of your stock — congratulations! Or, it’s a sign you’re facing issues at some link in your retail supply chain and don’t have enough stock available.
Inventory fluctuations happen for different reasons and are very normal. That’s why calculating your beginning inventory is so important for financial stability, demand forecasting, inventory calculations, updating your balance sheets, and much more.
Let’s jump into what beginning inventory is and how to easily calculate it.
What is beginning inventory?
Beginning inventory is the total dollar value of a business’s current inventory in-stock at the beginning of an accounting period. Beginning inventory consists of all the inventory held by a business that can be sold to generate revenue. It’s important to note that the beginning inventory, should equal the same amount as the ending inventory from the prior accounting period.
Where you’ll use beginning inventory
Beginning inventory is an important aspect of inventory accounting that you’ll need to use at the start of an accounting period in the following areas.
Balance sheets are an important indication of financial health, as they improve your chances of qualifying for bank loans and also increase your investors’ and partners’ confidence in your business. Inventory is often the largest asset an ecommerce business has, and beginning inventory is the amount documented when a new accounting period starts.
Internal accounting documents
Beginning inventory provides insight into the valuation of your stock, which is useful for internal accounting documents such as income statements. It helps with ecommerce bookkeeping in the following ways:
- Identify any possible discrepancies and inventory shrinkage.
- Conduct inventory reconciliations and track inventory write-offs when inventory has lost its value and cannot be sold due to damage, theft, loss, or decline in market value.
- Determine future production and reorder quantities so you’re not stuck with too much or too little stock.
Knowing your beginning inventory helps determine the tax deductions from your stock. Having too large of a beginning inventory, or one that’s too small, can be detrimental for your taxes.
For example, a large amount of ecommerce inventory won’t help you save on taxes because the tax deduction is only applicable after the goods are sold or deemed worthless and disposed of. Also, storing great amounts of inventory and/or many SKUs will raise your ecommerce warehousing costs.
Formulas related to beginning inventory
To calculate the cost of goods sold at the end of an accounting period, you can use the records from your previous accounting period.
Cost of Goods Sold (COGS) = (Beginning Inventory + Purchases) – Closing Inventory
Ending inventory from prior financial period
Your accounting records from the prior financial period help you determine where you left off. In other words, your ending inventory from Q3 is your beginning inventory in Q4.
If this is your first time calculating ending inventory, you will need to determine how much new stock was purchased and sold in a period of time.
Ending Inventory = Beginning Inventory + Net Purchases – COGS
Note: Choosing the right inventory valuation method for your ending and beginning inventory is crucial for maintaining a financially strong balance sheet. Inventory can be valued using methods such as LIFO (last-in first-out), FIFO (first-in first-out), and even inventory weighted average.
How to calculate your beginning inventory
After determining the ending inventory balance and COGS from the previous accounting period, you can now calculate your beginning inventory at the start of a new accounting period. The formula for doing so is:
Beginning Inventory Formula = (COGS + Ending Inventory) – Purchases
The easiest way to understand this formula is by walking through an example.
Let’s say you sold 1,000 refrigerators during the last accounting period, and you purchased each one for $500 from the supplier. The cost of goods sold is:
Manufacturing Price x Quantity = COGS
$500 x 1,000 = $500,000
Now, let’s say at the end of the period, you have 500 refrigerators left. This means the ending inventory is worth:
Manufacturing Price x Remaining Quantity = Ending Inventory
$500 x 500 = $250,000
Furthermore, if your business produced or purchased an additional 700 refrigerators in the new year, the cost of the new inventory is:
Manufacturing Price x Quantity = Purchases
$500 x 700 = $350,000
Thus, we can now calculate beginning inventory using the formula:
(COGS + Ending Inventory) – Purchases
($500,000 + $250,000) – $350,000 = $400,000
This means the beginning inventory is $400,000 at the start of the accounting period.
How to find beginning inventory when using multiple warehouses
Large businesses that are shipping a high volume of orders across regions often opt for a ‘distributed’ inventory system — in which inventory is divided up and stored in a number of fulfillment centers in various locations. This can help speed up the order delivery process and save on shipping costs.
The good news is that using multiple warehouses doesn’t have to make finding the beginning inventory in each tricky. With a tech-enabled third-party logistics (3PL) company like ShipBob, you can log in to your inventory management system and access real-time inventory counts.
ShipBob’s software fully integrates with your other business systems and gives you direct insight into warehousing and specific information down to the SKU and unit level, from one central dashboard.
“We have access to live inventory management, knowing exactly how many units we have with ShipBob in each warehouse. It not only helps with our overall process in managing and making sure our inventory levels are balanced but also for tax purposes at the end of the year. ShipBob made that entire process very simplified for our accountants and us.”
Matt Dryfhout, Founder & CEO of BAKblade
Determining your beginning inventory at the end of each accounting period can be time-consuming if you don’t have a good system for tracking inventory in place.
With ShipBob, you can compute your beginning inventory in no time, without requiring staff to perform an inventory audit or a physical count of the products. ShipBob not only stores products and fulfills orders for you, but our inventory management software monitors inventory levels across multiple warehouses, making it an easy choice for fast-growing ecommerce businesses.
View historical inventory levels by changing filters to the date range of your choice, filter down to the product or lot level, view status by channel sold on, and more.
“I felt like I couldn’t grow until I moved to ShipBob. Our old 3PL was slowing us down. Now I am encouraged to sell more with them. My CPA even said to me, ‘Thank God you switched to ShipBob.’ ShipBob provides me clarity and insight to help me make business decisions when I need it, along with responsive customer support.”
Courtney Lee, founder of Prymal
Click the button below to learn more about how ShipBob makes inventory management and order fulfillment even easier for your ecommerce business.
Beginning inventory FAQs
Determining your beginning inventory is an important task for ecommerce stores. The following information answers some frequently asked questions about beginning inventory.