Oregon Nonprofit Taxes: Corporation Tax, CAT, No Sales Tax, Property Tax, and Local Taxes

The short answer

Oregon has no general statewide retail sales or use tax. That is true, it is useful, and it answers exactly one question. It does not mean an Oregon nonprofit has no tax obligations, and it does not mean federal §501(c)(3) status resolves the ones that remain.

There are six things to evaluate, and they are genuinely separate systems with separate agencies, thresholds, and forms: ordinary Oregon corporation-tax treatment; Form OR-20 if there is unrelated business income; the Corporate Activity Tax; activity-specific, excise, and out-of-state duties, including the state transient lodging tax; property-tax exemption with the county assessor; and the Portland, Multnomah County, and Metro business taxes. Work through them in that order and nothing gets missed by assumption.

Corporation tax: usually no Oregon application, and one exception

Oregon generally recognizes a qualifying federal exempt determination for corporation excise and income tax without a separate ordinary Oregon exemption application. An organization that files only federal Form 990 and has no unrelated business taxable income ordinarily does not file an Oregon corporation return at all, and there is no state exemption-application fee for the ordinary federally exempt organization.

Two qualifications matter. First, ORS 317.080 identifies nonprofit homes for the elderly and people’s utility districts as having separate Oregon application rules, so “no application needed” is the ordinary case rather than a universal one. Second, the treatment is only as durable as the federal qualification behind it: losing federal qualification, or having unreported taxable activity, can create Oregon return, tax, penalty, and interest obligations.

Form OR-20 and unrelated business income

Unrelated business income is where an otherwise exempt Oregon organization re-enters the corporation-tax system. An organization filing federal Form 990-T with Oregon-source or apportioned unrelated business taxable income files Oregon Form OR-20, the Oregon Corporation Excise Tax Return, and attaches the federal 990-T.

The calculation is a greater-of test rather than a single rate: the organization is subject to the greater of the Oregon tax calculated on UBTI allocated or apportioned to Oregon, or the Oregon minimum tax — and for the minimum-tax sales measure, only unrelated-business gross income counts. The return is due by the corporation return due date for the tax year, including an approved extension.

A federal Form 990-T can contain several distinct activities, and the CAT and Portland-area treatment of the same unrelated income are separate analyses rather than consequences of this one. Filing OR-20 does not answer the CAT question, and answering the CAT question does not answer this one.

CAT: a separate tax, and the nonprofit exclusion has a limit

The Corporate Activity Tax is not the corporation excise or income tax, and it is not a retail sales tax. It is a third system with its own registration, return, and thresholds.

Nonprofit organizations, including §501(c)(3) entities, are excluded from CAT unless the organization has unrelated business taxable income under federal law. So the starting exclusion is controlled by federal exemption, and the limit on it is federal UBTI — the same concept that drives OR-20, reached independently. Unrelated or commercial activity can enter the CAT system without regard to what the Oregon corporation-tax reporting looks like.

The practical work is classification: sort receipts under ORS 317A and keep the federal UBTI workpapers that support the sort. Misclassifying unrelated receipts is what produces registration penalties, tax, interest, and return penalties, and excluded receipts and unitary-group rules can materially change the calculation.

The three CAT boundaries, and why the operators are not interchangeable

CAT has three separate boundaries, and each uses its own operator. Register within 30 days after Oregon commercial activity exceeds $750,000. File Form OR-CAT at $1,000,000 or more of Oregon commercial activity. Tax is payable only on taxable Oregon commercial activity over $1,000,000, and equals $250 plus 0.57% of the excess.

Read those three together and the shape becomes clear: registration comes first and at a lower number, filing comes next, and liability comes last and only above a million. An organization can be required to register and file and still owe nothing. Because the payment boundary is “more than $1,000,000”, exactly $1,000,000 of taxable commercial activity is not above it — converting that to “at least $1,000,000” would create a liability the statute does not impose.

The Department of Revenue’s own webpage summary table uses inconsistent shorthand at exactly $750,000 and exactly $1,000,000. The guide follows the statute and the current instructions instead: exceed $750,000 to register, $1,000,000 or more to file, more than $1,000,000 in taxable activity to owe tax. Two further numbers: estimated payments apply if expected CAT liability is at least $5,000, and the failure-to-register penalty is $100 per month up to $1,000 per year. The annual return is due the 15th day of the fourth month after tax-year end.

No sales tax, and the taxes that are not the sales tax

The Department of Revenue states affirmatively that Oregon has no general sales, use, or transaction tax, and it follows that no Oregon statewide sales-tax exemption application or certificate exists. An Oregon nonprofit should not request a nonexistent statewide purchase-exemption number, and presenting a fabricated certificate confuses vendors while changing nothing about another state’s rules.

What still needs screening is a real list: vehicle taxes, lodging taxes, payroll taxes, excises, CAT, property tax, and local taxes. Sales into other states are governed by those states, not by Oregon’s lack of a sales tax, so an Oregon nonprofit selling across state lines evaluates each destination state on its own terms. New revenue activity is the trigger to run this screen again rather than a reason to assume the earlier answer still holds.

Transient lodging tax: 1.5% now, 2.75% from January 1, 2027

A nonprofit that is a transient-lodging provider or intermediary collects the state transient lodging tax. The current rate is 1.5% for taxable Oregon lodging before January 1, 2027. Returns are quarterly — April 30, July 31, October 31, and January 31 for the preceding calendar quarter — and a zero-activity quarter is still a filing obligation while the account is registered. Providers may retain the statutory 5% administrative allowance. Late filing carries a 5% late-payment penalty, an additional 20% penalty for a return more than 30 days late, and interest.

HB 4134 is enacted and sets the state rate at 2.75% beginning January 1, 2027. Both halves of that sentence matter. The rate is real, so continuing at 1.5% after the effective date understates tax; and it is not yet operative, so applying 2.75% to 2026 lodging overcharges customers. Final 2027 transition forms and portal instructions had not been posted as of the research date, which is why the guide publishes the enacted rate as future-effective and does not invent the form fields to go with it. Local lodging taxes can apply on top of the state tax either way.

Property tax: three claim routes, one April 1

Property-tax exemption in Oregon is claimed with the county assessor and is not automatic. Federal §501(c)(3) status, DOJ charity registration, and nonprofit corporate ownership do not establish it, because the statute tests use rather than status.

Which claim applies depends on who owns the property and who uses it, and the three routes are not interchangeable. Property the organization owns or is purchasing uses Form OR-AP-RPPTE, proving qualifying organization, ownership or purchase, actual and exclusive exempt use, and reasonable necessity. Property leased from a taxable owner uses Form OR-AP-RPPTE-L under ORS 307.112, where the lease generally must run at least one year, the exempt organization must use the property in a qualifying way, and the property-tax savings must inure solely to the lessee — a month-to-month arrangement, an inadequate lease, or a failure to pass the savings through causes denial. Property owned by one exempt body and used by another exempt user is the third route, with its own claim and agreement evidence.

The use test then continues after approval. The property must be actively occupied and used exclusively in a way that directly furthers the exempt purpose and is reasonably necessary. Mixed-use or income-producing portions that fail the test stay taxable, and a qualifying portion can receive partial exemption rather than the claim failing outright. Incidental income and shared use are fact-specific: revenue-producing activity neither automatically defeats nor automatically preserves the exemption.

Schools and certain other categories use their own governing sections and forms, and there is no uniform statewide application fee — county-adopted fees may apply, which is a local fact and not a statewide rule.

The April 1 deadline, and the late relief that is not a grace period

File the ordinary nonprofit property-exemption claim by April 1 for the tax year beginning July 1. Property acquired after March 1 and before July 1 gets 30 days from acquisition instead.

Late relief exists and it is specific rather than general. Filing by December 31 of the current tax year costs the greater of $200 or 0.1% of real market value. Filing by April 1 for the current year under first-time, good-cause, or government conditions costs $200. And a further route covers the current year plus up to five prior years at the greater of $200 or 0.1% of value, multiplied by the number of prior years.

The five-prior-year route carries notice and eligibility conditions and should not be treated as an automatic five-year correction. Missing the late-relief requirements leaves the property taxable for the years claimed, which is the outcome the deadline exists to avoid.

Portland, Multnomah County, and Metro are three taxes

The Portland-area business taxes are frequently discussed as one thing. They are three, administered together by the City of Portland Revenue Division but imposed by three different jurisdictions with three different rates, thresholds, and workflows.

The Portland Business License Tax is 2.6% of net business income allocated to Portland when taxable. Register for a Revenue Division account within 60 days of beginning business. A corporation exempt under ORS 317.080 is generally exempt except to the extent it has unrelated business income — but the exemption must be claimed on the annual business tax return with supporting federal and Oregon tax pages. Calendar-year returns are generally due April 15. Failing to register or file can produce estimated assessments, civil penalties, and collection even where the organization believes an exemption applies.

The Multnomah County Business Income Tax is 2% of net business income allocated to the county, with the same 60-day registration, the same annual exemption claim with supporting tax pages, and the same general April 15 return date. It is a separate tax from Portland’s, and failing to file the annual exemption claim can produce notices, civil penalties, and collection.

The Metro Supportive Housing Services business income tax is 1% of apportioned net business income, and it works differently in two ways. It applies to businesses whose gross receipts everywhere exceed $5 million, with $5,000,000 or less exempt. And a taxpayer qualifying for the Metro exemption does not file a Metro return solely to claim it — unlike Portland and Multnomah County, where the annual exemption claim is the filing. Metro is a regional jurisdiction, neither a state nor a county tax.

Portland’s threshold changes in 2027, and the operators are strict

Portland’s general gross-receipts exemption is a moving number, and the guide keeps the two values as separate entries. For 2026 the exemption applies when total gross receipts are strictly less than $75,000. Beginning with tax year 2027 the threshold is strictly less than $100,000. Multnomah County’s general gross-receipts exemption is strictly less than $100,000.

All three are “less than”, which means hitting the number exactly falls outside the exemption. And the timing runs both ways: using the 2027 threshold for a 2026 return produces an unsupported exemption claim, while failing to use it in 2027 can create an unnecessary filing or tax calculation.

One more separation is worth stating plainly, because it is easy to collapse. The general gross-receipts exemption is not the nonprofit exemption. A nonprofit can be under the receipts threshold, or over it, and either way the separate ORS 317.080 nonprofit exemption and its unrelated-business-income limit still have to be applied on their own terms.

A working decision sequence

One: confirm federal exempt status and treat Oregon corporation tax as ordinarily following it, while checking whether ORS 317.080 puts the organization in one of the separate-application categories. Two: determine whether there is unrelated business taxable income. If a federal Form 990-T is filed with Oregon-source or apportioned UBTI, file Form OR-20 and attach the 990-T.

Three: run the CAT analysis independently. Nonprofit receipts are excluded unless there is federal UBTI. If they are not excluded, measure Oregon commercial activity against all three boundaries: register above $750,000, file at $1,000,000 or more, pay only above $1,000,000. Four: screen the remaining taxes rather than assuming the absence of a sales tax covers them — lodging, payroll, excise, vehicle, and out-of-state duties, and re-run the screen whenever a new revenue activity starts.

Five: if the organization operates transient lodging, use 1.5% through December 31, 2026 and 2.75% from January 1, 2027, file quarterly including zero quarters, and check the DOR forms before the first 2027 filing. Six: if the organization owns, leases, or lets another exempt body use Oregon property, identify which of the three claim routes applies, gather the ownership or lease evidence and the actual-and-exclusive-use documentation, and file with the county assessor by April 1 — or within 30 days for property acquired after March 1 and before July 1.

Seven: if the organization does business in Portland, Multnomah County, or the Metro district, register within 60 days where required and treat the three as three. Claim the Portland and Multnomah County nonprofit exemptions annually on the returns with supporting tax pages; test Metro against the more-than-$5-million boundary and remember that a Metro-exempt taxpayer does not file to claim it. In all three, the nonprofit exemption generally does not reach unrelated business income. And keep one habit throughout: record which operator each threshold uses, because “more than”, “at least”, and “less than” are doing real work in this area and are not stylistic choices.