Which tax jurisdictions Wilsonville is actually in
Wilsonville is in Clackamas County. Oregon’s local tax boundaries do not follow city limits or ZIP codes, so this is worth being precise about.
- Inside the Metro district, so Metro SHS applies to income above $128,000 single / $205,000 joint.
- Outside Multnomah County, so Preschool for All does not apply on residency — but it can still apply to income sourced to work performed in the county.
- Wilsonville operates SMART, its own transit service, and sits outside the TriMet district — so the TriMet payroll and self-employment taxes do not apply here even though Metro SHS does.
- The statewide transit tax still applies to wages for work performed here.
The local economy, and what it means for a tax return
Corporate campuses, distribution centers and light manufacturing along the I-5 corridor, with a residential population that commutes in several directions. Employers here often have staff spread across Clackamas, Washington and Marion counties.
We work with clients around the I-5 corporate corridor, Old Town and the Willamette riverfront, the Charbonneau district south of the river and the distribution parks along Boones Ferry.
Who we work with in Wilsonville
- Distribution and light manufacturing businesses along the I-5 corridor
- Corporate campus employees commuting from several directions
- Employers with staff spread across Clackamas, Washington and Marion counties
- Charbonneau households with retirement and investment income
What we do most of in Wilsonville
Tax situations we see in Wilsonville
Inside Metro, outside TriMet — and why that is unusual
Wilsonville is one of very few places in the metro where the Metro district and the TriMet district disagree. Metro SHS applies to residents above the threshold. The TriMet payroll tax and the TriMet self-employment tax do not apply, because the city runs SMART instead. Self-employed people here pay a tax they do not owe about as often as employers miss one they do.
Working with us from here
About twenty-five minutes from the Clackamas office down I-205 and I-5.
Most clients outside the immediate Clackamas area work with us remotely — secure document exchange, a phone or video appointment, and e-filing. If you would rather sit across a desk, both offices do that too: Clackamas and The Dalles.
Questions we get from Wilsonville
Do I owe the TriMet self-employment tax in Wilsonville?
Generally not — Wilsonville is outside the TriMet district. But the boundary is specific, so confirm rather than assume, particularly if you work across the metro.
Do I owe Metro SHS?
Yes, Wilsonville is inside the Metro district. The Metro and TriMet boundaries are different, which is exactly why this city causes confusion.
We have employees in three counties.
Then work location drives withholding for each of them individually. That is normal for Wilsonville employers and it is worth auditing annually.
We have employees in three counties. What drives withholding?
Each employee’s actual work location, individually. For local taxes that means tracking the jurisdiction rather than the state, because Metro, Multnomah County and the transit districts all have different boundaries.
We are relocating our warehouse across the county line. Tax implications?
Payroll withholding for everyone based there, potentially your transit tax position, and your apportionment for the local business taxes. Worth checking before the lease is signed rather than after the move.
Talk to someone who files these returns every week
Bring last year’s return and whatever changed. Start with a complimentary 15-minute introductory call about your situation and whether we are a good fit.
Written by
Enrolled Agent, Oregon Licensed Tax Consultant
License number: Enrolled Agent 00160070-EA · Oregon Licensed Tax Consultant 35746-C
Heather has spent more than a decade preparing individual and business returns across the Portland metro and the Columbia Gorge, and holds unlimited rights to represent taxpayers before the IRS.
Last reviewed
This page is general information about Oregon, Washington and federal tax rules, not advice about your own return. Thresholds and rates change every year. Figures were verified as of August 2026 — check the linked official sources, or talk to us about your situation.