Washington HOA Special Assessment Calculator — RCW 64.90.430 (WUCIOA 5% Threshold / 67% Member Vote)

Under RCW 64.90.430, a WUCIOA board may impose special assessments without owner approval UNLESS the total of all special assessments imposed in the same calendar year exceeds 5% of the annual operating budget. The 5% threshold is calculated on the aggregate of all special assessments for the year — so if the board has already imposed a special assessment earlier in the year, the new assessment's amount is added to determine whether the threshold is crossed. An assessment above the 5% threshold requires approval of at least 67% of unit owners (or a higher percentage if the declaration requires it).

When the WUCIOA 5% threshold is triggered, the board must obtain approval from at least 67% of ALL unit owners (not just those voting) under RCW 64.90.430 — unless the declaration or bylaws require a higher percentage. Practical implication: if the association has 100 units, the board needs affirmative votes from at least 67 unit owners (regardless of how many attend the meeting). This is a substantially higher bar than a simple majority of a quorum. The board must provide adequate notice of the vote and the purpose of the special assessment. Many boards structure assessments to stay below the 5% threshold in a given year, or obtain member approval proactively to avoid project delays.

The 5% threshold under RCW 64.90.430 applies to SPECIAL ASSESSMENTS — amounts assessed in addition to regular assessments outside the adopted operating and reserve budget. Contributions to the reserve fund through the adopted annual budget are regular assessments, not special assessments, and do not count toward the 5% threshold. However, a mid-year increase to the regular assessment budget (rather than a special levy) may have a different procedural pathway under the declaration. Boards should consult Washington HOA counsel before structuring a project funding mix that is designed primarily to circumvent the 5% threshold.

Under RCW 64.38.045, an HOA Act board may impose an emergency special assessment — without member vote — for health and safety emergencies, property preservation, or other urgent needs that cannot wait for normal budgetary process. The emergency characterization must be genuine; boards cannot use the emergency provision to bypass owner approval for routine large projects. For non-emergency special assessments, the HOA Act provides less detailed guidance than WUCIOA — the declaration and bylaws govern whether owner approval is required and what threshold applies. Older HOA Act declarations often require a simple majority vote for large assessments; check the declaration carefully.

The WUCIOA RCW 64.90.430 threshold is based on the TOTAL ANNUAL OPERATING BUDGET of the association — not the per-unit regular assessment or assessment per month. For a 50-unit association with a $500,000 annual budget, the 5% threshold is $25,000 in total special assessments ($500/unit). For a 200-unit association with a $2,000,000 budget, the threshold is $100,000 ($500/unit). The per-unit calculation matters for understanding owner impact, but the threshold analysis uses total-budget figures.