Form 990 in Plain English: What Nonprofit Leaders Need to Know Before You File 

Melanie Kirton | Apr 06 2026 14:04

Form 990 season tends to bring out two types of nonprofit leaders:  

 

  • the ones who pretend it is not happening

 

  • and the ones who wake up at 2 a.m. thinking about “functional expenses”  

 

Let's make you neither.  

 

Form 990 is more than a tax filing. It's a public document   that donors, funders, journalists, and board members can use to evaluate your organization.  

 

Your goal   isn’t   to have a “perfect-looking 990.”  

 

Your goal is to have a   truthful, consistent, and defensible   990 that matches the real story of your work.  

 

(Educational only — not tax advice.)  

 

What Form 990   actually does   (in plain English)  

 

Form 990 tells the IRS (and the public):  

  • who you are  
  • what you did  
  • how you were governed  
  • how you handled money  
  • how you compensated key people  
  • whether your policies support accountability  

In other words:   it’s   a reputation document as much as it is a compliance document.  

 

The 4 parts that matter most to EDs and boards  

 

1) Program story (what you did)  

 

Your program descriptions should match your mission language and reflect real outcomes—without exaggeration.  

 

2) Revenue categories (how money came in)  

 

Where nonprofits get tripped up:  

  • mixing program income and contributions  
  • not   properly reflecting   special events  
  • mishandling restricted grant revenue timing  
  • forgetting in-kind support  

3) Functional expenses (how money was spent)  

 

Functional expenses matter because outsiders use them to create narratives:  

  • “How much went to programs?”  
  • “How much went to fundraising?”  
  • “Is admin too high?”  

The goal   isn’t   to game the ratio. The goal is to   allocate   expenses consistently and document your method.  

 

4) Governance & policies (how you   operate )  

 

Form 990 asks governance/policy questions that many boards   don’t   realize are “reportable.”  

 

This is where clear policies and documented processes protect you.  

 

The biggest Form 990 mistakes (and how to avoid them)  

 

Mistake 1: Waiting until the last minute  

 

If your books   aren’t   clean, the 990 becomes a scramble.  

 

Clean close → clean reporting → clean filing.  

 

Mistake 2: Letting the 990 tell a different story than your website  

 

If your messaging says “we served thousands” but your 990 program descriptions are vague, donors notice inconsistencies.  

 

Mistake 3: Functional expenses with no method  

 

If you   allocate   rent, payroll, and shared costs without a consistent method, you invite questions.  

 

Mistake 4: Board review   doesn’t   happen  

 

Even if the board   doesn’t   prepare it, the board should understand it.  

 

A 20-minute review saves a year of confusion.  

 

Your calm April prep plan (simple and realistic)  

 

Here is your  “no panic” plan:  

 

  1. Close your books   (and reconcile key accounts)
  2. Confirm your chart of accounts mapping  to revenue and functional categories
  3. Gather governance documents  (board roster, meeting minutes, policies)
  4. Review year-over-year changes  (big swings deserve explanations)
  5. Schedule a short board/finance committee review  before filing
  6. Document your allocation method  for shared costs  

 

If you want a step-by-step checklist, download the Form 990 Prep Kit below.  

 

 

CTA:   Download the   Form 990 Prep Kit for EDs & Boards