What Does LIFO (Last In, First Out) Mean?

the most recently received inventory is the first to be picked, shipped, or sold. Older stock remains in place until all newer stock has been used.

Helvis OpenClaw

Editorial Team, Fulfyld

Published Jun 9, 2026

Updated Jun 9, 2026

Quick answer: LIFO (Last In, First Out) is an inventory method where the most recently received stock is the first to be picked and shipped. Older units stay in place until all newer stock has been moved.

What Does LIFO Mean?

A clean office desk scene featuring stacked inventory boxes, a calculator, and financial documents labeled with inventory lay

LIFO (Last In, First Out) is an inventory management method where the most recently received stock gets picked and shipped before older stock.

Warehouses running LIFO typically stack new product arrivals at the front of a bin or pallet location, pulling from that position without rotating to older units underneath. The older stock stays put.

This method appears most in non-perishable goods, raw materials, and bulk commodity storage, where product age doesn’t affect quality or customer experience.

The Difference Between Physical and Accounting LIFO

Physical LIFO refers to pick order on the warehouse floor. Accounting LIFO refers to which cost layer gets applied to each sale for COGS calculation.

A warehouse can physically operate on LIFO while the finance team reports using FIFO. They’re separate decisions with separate consequences.

One important note: LIFO is banned under International Financial Reporting Standards (IFRS), which applies to businesses in over 140 countries. If your company reports under IFRS, accounting LIFO is not a legal option regardless of how your warehouse physically operates.

Where Is LIFO Typically Used?

LIFO is most common in industries where product age doesn’t affect quality:

Bulk commodity warehouses (grain, metals, aggregates)
Construction material suppliers with non-perishable stock
Industrial distributors managing interchangeable SKUs

For perishable goods or anything with a shelf life, FIFO is the appropriate physical method.

Key Components of LIFO

A modern warehouse interior with neatly arranged shelves and highlighted product batches, paired with a subtle overlay of acc

Inventory Valuation Basis

The cost layer assignment rule assigns the most recently acquired costs to each sale, producing higher COGS and lower taxable income when prices rise.

Cost Layer Tracking

LIFO layers are discrete cost records tied to each purchase batch, maintained separately to calculate accurate cost flow.

LIFO Reserve

The LIFO reserve is the gap between LIFO-based inventory value and FIFO value, a number lenders and investors use to restate financials for comparison.

Physical Vs. Assumed Flow

LIFO is an accounting assumption, not a warehouse instruction, the cost method applies to your books, not your shelves.

Understanding LIFO in Your Fulfillment Operation

LIFO is straightforward when applied to the right products in the right context. Knowing whether your warehouse or 3PL partner runs LIFO, and whether that matches your inventory type, is a basic but important part of keeping your supply chain running cleanly.

Frequently Asked Questions

Should STR hosts use LIFO or FIFO for cleaning and guest supplies?

Most STR hosts should use FIFO for perishable or expiration-dated supplies like toiletries and cleaning products to avoid waste. LIFO may be suitable for non-perishable items such as linens or hardware where product age doesn't affect quality.

Does the LIFO method affect how I report STR income on my taxes?

In the U.S., accounting LIFO can increase your reported cost of goods sold during inflationary periods, potentially lowering taxable income. However, LIFO is banned under IFRS, so hosts reporting in over 140 countries outside the U.S. cannot use it for tax purposes.

Can I use LIFO physically in my supply closet but report FIFO on my books?

Yes. Physical pick order and accounting cost flow are separate decisions. You can stack new supplies at the front of your storage area (physical LIFO) while assigning the oldest purchase costs to expenses on your financial statements (accounting FIFO).

What is a LIFO reserve and why would an STR property manager care about it?

The LIFO reserve is the dollar difference between your inventory valued under LIFO and what it would be under FIFO. Property managers scaling to multiple units may need this figure when seeking financing, as lenders often restate LIFO-based financials to FIFO for comparability.

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