Functional Expense Allocation

Some expenses are easy to categorize. Your program director's salary is a program expense. Your fundraiser's salary is a fundraising expense. But what about the rent for your building where all these people work? Or the executive director who spends time on programs, management, and fundraising? That's where functional expense allocation comes in.

Functional expense allocation is the process of splitting shared costs across your functional categories (programs, management/general, and fundraising) using a reasonable, consistent method. The most common allocation bases are time studies (what percentage of time does each employee spend on each function?), square footage (how much space does each function use?), and direct cost ratios (allocate shared costs proportionally to direct costs in each function).

The key word is "reasonable." The IRS and auditors don't prescribe a single correct method, but they do require that your methodology make logical sense and be applied consistently. You can't allocate 90% of your executive director's salary to programs just to make your overhead ratio look better — if a time study shows they spend 40% on management, that's what you report.

How you allocate shared costs directly affects your overhead ratio and your financial statements. A poorly thought-out allocation can either overstate your overhead (making you look inefficient) or understate it (which raises red flags with auditors and sophisticated funders). Getting it right matters for credibility.

Auditors will test your allocation methodology during an audit. They'll want to see documentation — time studies, square footage calculations, board-approved allocation policies. Changing your methodology from year to year without good reason is a red flag. Consistency and documentation are everything.