Inventory Assembly item not deducting BOM Inventory items from Inventory

Thanks for your time visiting the QuickBooks forum, @esrperf2020,

I'd like to share some information about invoicing assemblies in QuickBooks Desktop.

When you add an assembly to a sale, it will not deduct to the individual inventory items in the Bill of Materials. This is because, an assembly is treated as one item consisting a set of products or services, and it has its own quantity.

Once it is assigned to an invoice, it will reduce the quantity assigned to it. See this:

The only time the quantity of inventory items are reduced is if you assign them directly to an invoice or you build an assembly. Take a look at this example:

Inventory Part QTY 1 AF002

There is nothing wrong with the process you're doing. However, if you want to reduce the quantity for an inventory part and not the assembly itself, use the second example I've shown you.

Assign the items in the BOM individually on the sales transaction. It should look like this:

To learn more about assemblies and how to use them, see the following links:

• Inventory Assembly Overview
• Set up your product’s bill of materials

Let me know if you have any other questions about this. I'll be right here to help you with any inventory concerns and all other things related to QuickBooks. Have a lovely day!

Ok , I see , my problem is that we sell inventory assembly items in market places like Ebay , Amazon and our own website , we use the QuickBooks web connector to import those orders into QuickBooks , those orders come as sales orders and then we convert them into invoices , so I am trying to figure out how to be able to deduct from our inventory those inventory items that are part of the assembly items . 

Hello @esrperf2020,

Let me share additional information about how a sale of inventory assemble affects the quantity on hand of your items.

Since the inventory assemble has its own quantity, it will deduct with its quantity, not on the items created with the assembly. With this, you can consider manually deducting the quantity of the items under the assembly after making a sale.

But please be informed that we do not recommend utilizing this method to avoid confusion once you review your reports for accounting reasons. To add, you can read more about assemblies with the articles shared by my colleague above.

Lastly, I've got you this helpful reference for a compilation of articles you can use while working with your inventory: Manage Inventory in QuickBooks Desktop.

If you have any other questions, please let us know by leaving any comments below. Stay safe and well!

Hello, adding my question here, as this seems to be the same issue I am having a hard time understanding.

When an inventory assembly, built of part A and part B from individual inventory is invoiced, Quickbooks does not adjust the on-hand count of parts A and B? I must be missing something because this seems to be the main reason most would build assembly parts in the first place. Please advice. Thank you!

The Community is always here to listen and find the best solution for you. Don't worry. I'll share information about invoicing assemblies to help you clear things up.

Including an assembly in a sale does not deduct from the individual inventory items in the Bill of Materials. It is because assembly is a single item made of a collection of products or services, with its quantity.

However, if assigned to an invoice, then the quantity will reduce. The same goes if you build an assembly. Please refer to this article for more information: Combine your inventory items to build finished goods.

You may also visit these articles to learn more about assemblies and their uses: 

• Inventory Assembly Overview
• Set up your product’s bill of materials

For additional QuickBooks-related concerns, don't hesitate to post them here in the Community. We're always available and willing to lend a hand to your queries. Have a great day ahead.

I know this thread is old, but the answer is to use the "Build Assemblies" function under inventory activities.  This increases the quantity of your assembly item and reduces the quantity of the inventory items that are used to make the assembly item.  Not sure why that wasn't said before.  Just keep in mind that COGS could seem off if you're using average cost method for inventory.  If you haven't been using the build assemblies function (like me), you'll need to do a physical count of the inventory items that are used in your assemblies and adjust those so they're current.  You'll also need to adjust the quantities of your assembly items - as they are likely a negative quantity on hand.  After you get the quantities of everything corrected and begin using the build assemblies, things should begin to flow.