Nonprofit Tax Filing: Everything You Actually Owe

Tax exempt is a narrower term than it sounds. It means exemption from federal income tax on income related to your exempt purpose. It does not mean exemption from tax.

This page covers everything else, because the annual return is the obligation organizations know about and these are the ones that catch them.

What exemption does and does not cover

The pattern is that federal recognition grants federal income tax exemption and nothing else automatically. Every state and local exemption is applied for separately, and several states grant none.

The federal annual return

One return from the 990 series each year: the 990-N postcard where gross receipts are normally $50,000 or less, the 990-EZ where receipts are under $200,000 and assets under $500,000, and the full 990 at or above either figure. Private foundations file the 990-PF at any size.

Due the 15th day of the fifth month after your year end. Three consecutive misses means automatic revocation of exemption, without a hearing.

Payroll, which is where the real risk sits

If you have employees, you have the same obligations as any employer, and payroll taxes are the area where individuals can be held personally liable.

Two nonprofit-specific points to raise with your payroll provider, because a generic setup will not ask. Many 501(c)(3) organizations are exempt from federal unemployment tax. And some may elect to reimburse state unemployment costs rather than pay contributions, which changes the calculation in both directions and is worth an informed decision rather than a default.

The serious risk is unremitted withheld tax. Money withheld from an employee’s pay belongs to the government, and responsible individuals, including officers and sometimes directors, can be personally pursued for it. This is one of the few areas where the corporate shield does not protect people.

Worker classification

Treating a worker as a contractor when they are functionally an employee is a classification problem rather than a saving, and it is examined actively by the IRS and by state agencies.

If you set the hours, direct how the work is done, provide the tools and the person works substantially for you, they are probably an employee whatever the agreement says.

Small nonprofits get this wrong more often than businesses, usually because the first hire is someone already helping who is put on an invoice arrangement to avoid setting up payroll. The correction is retroactive and expensive: back taxes, penalties and interest, at both federal and state level.

State obligations, which are separate and plural

Charitable solicitation registration is the one that catches organizations out most, because online fundraising means soliciting residents of many states at once. Register in your home state first, then in states where you actively solicit through mail, email, events or targeted campaigns.

Sales tax, which is two different questions

Organizations conflate them and the answers are different in most states.

Do we pay sales tax on what we buy? Some states exempt qualifying nonprofits from paying sales tax on purchases, usually on presentation of a certificate. Many do not.

Do we collect sales tax on what we sell? If you sell goods, you may be required to collect and remit, exempt status notwithstanding. Some states provide narrow exemptions for occasional fundraising sales.

Check both with your state revenue department before assuming either. Selling merchandise without collecting where you should have is a liability that accumulates quietly.

Who does this work

Compliance failures at small organizations are almost never knowledge failures. They are ownership failures: the organization knew about the 990 and the person who filed it left.

Write the owner into a job description or a board role, put every deadline in a calendar owned by the organization rather than an individual, and make the handover of these responsibilities an explicit step when anyone leaves.

Then check annually that three things are still live: your state corporate standing, your charitable registration in every state where you fundraise, and your registered agent address. All three lapse quietly and all three are discovered when a funder checks.

Choosing your fiscal year, once

Your fiscal year end permanently sets your annual return deadline, at the 15th day of the fifth month after it. Most organizations default to December without considering the alternatives.

The consideration people miss: choose the point when your books are quietest, not when your year feels like it ends. Closing the books in the middle of your busiest season means the annual return competes with the work.

Changing it later generally means Form 1128 and a short-period return, which is real work, so it is worth ten minutes at the start.

Records, and how long to keep them

Permanently: articles, bylaws, the determination letter, board minutes, annual returns and financial statements. Several years: accounting records, bank statements, payroll and grant files.

The clause that matters more than the schedule is the suspension. No document is destroyed while any investigation, audit or litigation is pending or anticipated. Routine destruction under a written policy is legitimate; destruction after a problem appears is not, and the policy is what distinguishes them.

A calendar for a calendar-year organization

Put every recurring deadline in a shared calendar owned by the organization rather than by an individual, with a reminder six weeks ahead. Most compliance failures are calendar failures rather than knowledge failures: the organization knew about the 990 and the person who filed it left.

Questions people ask

Do nonprofits pay taxes?

Recognised 501(c)(3) organizations do not pay federal income tax on income related to their exempt purpose. They pay other taxes.

Payroll taxes apply in full to employees, though many 501(c)(3) organizations are exempt from federal unemployment tax and may have options on state unemployment.

Income from an unrelated trade or business regularly carried on may be taxable and reported on Form 990-T.

State and local taxes are separate from federal exemption. State income tax, sales tax and property tax exemptions each require their own application, and several states grant none.

Does a nonprofit have to file a tax return?

Yes, an annual return from the 990 series, even where there is no tax to pay.

Which one depends on size: the 990-N postcard where gross receipts are normally $50,000 or less, the 990-EZ where receipts are under $200,000 and assets under $500,000, and the full 990 at or above either. Private foundations file the 990-PF at any size.

It is due the 15th day of the fifth month after your fiscal year ends, and three consecutive missed years means automatic revocation of exemption.

Churches and their integrated auxiliaries are generally excused from the annual return.

Do nonprofits pay payroll taxes?

Yes, in the same way as any employer. Income tax and the employee share of FICA are withheld and remitted, the employer share of FICA is paid, Form 941 is filed quarterly and W-2s are issued in January.

Two nonprofit-specific differences. Many 501(c)(3) organizations are exempt from federal unemployment tax. And some may elect to reimburse state unemployment costs rather than pay contributions, which is worth an informed decision rather than a default.

The serious risk is unremitted withheld tax. Money withheld from pay belongs to the government, and responsible individuals can be personally pursued for it, which is one of the few areas where the corporate shield does not protect people.

Are nonprofits exempt from sales tax?

It depends on the state, and it is two separate questions that organizations conflate.

On purchases: some states exempt qualifying nonprofits from paying sales tax on what they buy, usually on presentation of an exemption certificate. Many do not.

On sales: if you sell goods, you may be required to collect and remit sales tax regardless of exempt status. Some states provide narrow exemptions for occasional fundraising sales.

Federal 501(c)(3) recognition does not grant either. Check with your state revenue department, and check before you start selling, because uncollected tax accumulates as a liability quietly.

Do we need to register in other states?

In most states, if you solicit their residents, yes. Charitable solicitation registration is a state requirement entirely separate from federal exemption.

Online fundraising complicates this, because a donate button is visible everywhere. States differ in how they treat that, and the widely used reference point is the Charleston Principles, which broadly distinguish passive online presence from targeted solicitation.

Practically: register in your home state, then in states where you actively solicit through mail, email, events or targeted campaigns. If you fundraise nationally at scale, take advice, because penalties are assessed state by state.

Separately, operating in a state, with staff or premises, may require foreign qualification as a corporation there.

What is unrelated business income tax?

Tax on income from a trade or business regularly carried on that is not substantially related to your exempt purpose. It is reported on Form 990-T.

All three tests must be met: a trade or business, carried on regularly, not substantially related. Occasional activity generally fails the second.

Significant exclusions apply, including activity carried out substantially by unpaid volunteers, and sales of merchandise received as donations.

Common examples that catch organizations out include some advertising income and certain rental arrangements, particularly where the property carries debt. If a meaningful share of your income looks like ordinary commerce, raise it with your accountant.

Do we file a state tax return?

Usually something, and what varies considerably by state.

Most states require an annual corporate report to the Secretary of State to keep the entity in good standing. Many require an annual charitable registration renewal, often with financial information attached.

Some states require a copy of your federal Form 990. A few require their own income tax return or a separate state exemption renewal.

Federal recognition does not exempt you from state income tax automatically. Check with your state revenue department whether an application is needed, because organizations sometimes discover years later that they were required to file.

What happens if we file late?

For the 990 and 990-EZ, penalties can apply per day late, increasing for larger organizations. For the 990-N there is no monetary penalty for lateness.

The serious consequence is the same for all of them: three consecutive years of missed annual filings means automatic revocation of exemption, without a hearing.

If you are late, file as soon as you can. Penalties are lower the sooner the correction is made, and reasonable cause relief exists in some circumstances.

If you have already been revoked, apply for reinstatement promptly. Retroactive reinstatement is available in some circumstances if you act without unreasonable delay, and the option narrows the longer you wait.

This is reference information, not legal or tax advice. Rules vary by state and change over time. For a decision that carries real consequences, check the current text at irs.gov or your state registry, and talk to a nonprofit attorney or CPA.