Understand how to capitalize or expense software development costs for accurate financial reporting and tax compliance. Learn the GAAP stages and new IRC Section 174 rules for amortization.

Knowing how to treat software development costs on your company's books isn't just a record-keeping task—it dictates how you report profitability and comply with federal tax law. Deciding whether to capitalize or expense these costs has major financial implications, and recent changes to the tax code have made getting it right more important than ever. This guide breaks down the rules for both financial reporting and tax purposes, giving you a clear path forward.
Before you can amortize software development costs, you must first capitalize them. Capitalization means recording an expenditure as an asset on the balance sheet rather than an expense on the income statement. The core principle behind this decision, according to Generally Accepted Accounting Principles (GAAP), is the matching principle: you want to spread the cost of the asset over the period it provides economic benefit.
Here’s the difference:
Determining which costs to capitalize versus which to expense depends on the specific stage of the development project.
For internal-use software, GAAP guidelines (specifically ACS 350-40) break the development process into three distinct stages. The accounting treatment is different for each one.
This is the "blue-sky" phase where ideas are explored and feasibility is assessed. Any costs incurred during this stage must be expensed as they happen. They are treated as research and development (R&D) expenses.
Activities in this stage include:
Essentially, any spending before management formally commits to a specific development project gets expensed.
Once the project gets the green light and it is probable that the software will be completed and used for its intended purpose, you enter the application development stage. This is where you capitalize costs. This phase starts when the preliminary work is done and management authorizes funding.
Costs eligible for capitalization include:
The capitalization period ends once all substantial testing is complete and the software is ready for its intended use.
After the software goes live, you enter the operational stage. Costs incurred from this point forward are typically expensed. These are considered maintenance and administration costs, not development.
These expenses include:
The key distinction is whether an expenditure creates significant new functionality (potentially capitalizable) or simply maintains the existing functionality (expensed).
While GAAP rules dictate how you report to investors and stakeholders, the Internal Revenue Code (IRC) dictates how you report to the IRS. For tax years beginning after December 31, 2021, the Tax Cuts and Jobs Act (TCJA) fundamentally changed how businesses must treat software development costs.
Previously, you could choose to immediately deduct R&D expenses (including software development) in the year they were incurred. That option is now gone. Under the new rules of IRC Section 174, all Specified Research or Experimental (SRE) expenditures, which include software development costs, must be capitalized and amortized for tax purposes.
Here’s what you need to know:
This change has created significant book-tax differences, as the amortization period for GAAP (typically 3-5 years) and tax (5 or 15 years, with the mid-year convention) will rarely align.
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Once you’ve identified the total capitalized costs for book purposes, you can begin to amortize them. The process is straightforward.
For financial reporting, amortization begins when the software is ready for its intended use, also known as being "placed in service." This means the system has been fully tested and is operational, even if employees haven’t started widespread use.
Next, you must estimate the software’s useful life—the period over which it will provide economic value. Most companies use a useful life of 3 to 5 years for internal-use software. Factors influencing this decision include:
A shorter life (e.g., three years) is often justified due to the rapid obsolescence of technology.
The vast majority of companies use the straight-line method for amortization. This method allocates the cost evenly across each period of the software’s useful life. Other methods, like the units-of-production method, are allowed if they better reflect the pattern of the asset's use, but this is uncommon for internal-use software.
The calculation is simple. To find the monthly expense, use this formula:
(Total Capitalized Costs) / (Useful Life in Months) = Monthly Amortization Expense
The corresponding journal entry is a debit to increase an expense account and a credit to increase a contra-asset account:
Debit: Amortization Expense
Credit: Accumulated Amortization - Software
Accumulated Amortization is reported on the balance sheet, reducing the book value of the capitalized software asset over time.
Let's say FinCore Inc. develops a new client relationship management (CRM) system for its internal teams. Development starts on February 1, 2024, and the software is placed in service on September 1, 2024.
The company incurs the following costs, all domestic:
As you can see, the book expense and the tax deduction can be quite different, creating a deferred tax asset or liability that needs to be tracked on the balance sheet.
Properly amortizing software development costs requires a solid understanding of both GAAP and the recently reformed IRC Section 174. By correctly segregating costs into their respective stages and applying the right amortization rules, you ensure your financial statements are accurate and your tax filings are compliant.
When you encounter complex scenarios or need to pin down the nuances of new guidance like Section 174, relying on fast, accurate research is key. We designed Feather AI to help professionals get instant answers with citations from authoritative sources, so you spend less time searching for regulations and more time applying them effectively.
Written by Feather Team
Published on December 22, 2025