Five-second answer

Claim we investigated

I-645 [is] a ballot initiative that would give them a $300 billion tax break.

False. Official estimates put four years of the tax at about $13 billion; $300 billion is 23 times that. The Legislature's fiscal note ($12.894 billion over four years; $23.677 billion over seven), OFM's ballot statement ($11.4 billion through FY2031) and the No campaign's own ad ($13 billion) all contradict $300 billion, which no source we found uses.

Quote or cite this fact-check

FactHub rates the claim “I-645 [is] a ballot initiative that would give them a $300 billion tax break” False (high confidence): Official estimates put four years of the tax at about $13 billion; $300 billion is 23 times that. Reviewed October 22, 2026. https://facthub.org/n/article/jayapal-300-billion-tax-break/3

One-minute summary

What the evidence establishes

  • Established. Rep. Jayapal's Sept. 26 post said I-645 would give millionaires and billionaires "a $300 billion tax break." It was still up and unedited on Oct. 21.
  • Established. The Legislature's fiscal note projects $12.894 billion over the tax's first four years and $23.677 billion through FY2035; OFM's ballot statement says $11.4 billion through FY2031.
  • Established. $300 billion is 23 times the four-year estimate and 12.7 times the longest official projection.
  • Established. The No campaign ad linked in her own post calls I-645 "a 13 billion dollar tax break."
  • Not shown. Why she wrote $300 billion is not known; a slip for $13 billion is likely but unconfirmed.
  • Context. Repeal is a tax cut relative to current law; only its size is in dispute here.
Important context: On Sept. 26, 2026, U.S. Rep. Pramila Jayapal (D-Seattle) posted on X that "millionaires and billionaires are trying to pass I-645, a ballot initiative that would give them a $300 billion tax break." In her post, "them" means those millionaires and billionaires. I-645 would repeal Washington's 9.9% tax on household income over $1 million. The post linked a No on 645 campaign ad. As of Oct. 21 the post was still up, unedited and uncorrected. We rate her exact words; the inserted [is] only makes the fragment a sentence. Repeal is a tax cut for high earners relative to current law; this check rates only its size.

Working families already pay 3 times more than the top 1% in Washington. Now, millionaires and billionaires are trying to pass I-645, a ballot initiative that would give them a $300 billion tax break by cutting social programs in K-12 schools. Make it make sense.

Pramila Jayapal, U.S. Representative for Washington's 7th District Post on X from @PramilaJayapal · · Assertion

Context: Posted at 7:15 a.m. PDT on Sept. 26, 2026, with a link to the No on 645 YouTube ad "Some Things Work Better Upside Down," whose description calls I-645 "a 13 billion dollar tax break." As of Oct. 21, 2026 the post was still up, unedited, with no correction found from her account; her office gave no source for $300 billion in coverage we found.

Source: Post by Rep. Pramila Jayapal (@PramilaJayapal) on X, Sept. 26, 2026 · View in the dataset

The evidence

The conclusion rests on the combined record. Expand each item to see its role and limitations.

Independence note: This check uses 3 methods across 7 institutions and 1 country or international grouping.
Evidence map
Method Institution / country Year(s) What it shows Key limitation Primary links
Read the post through X's own embed record and an independent reader, and archived both copies with the Internet Archive. X (post by Rep. Pramila Jayapal), Internet Archive United States 2026 Posted from @PramilaJayapal at 7:15 a.m. PDT on Sept. 26, 2026: millionaires and billionaires "are trying to pass I-645, a ballot initiative that would give them a $300 billion tax break by cutting social programs in K-12 schools." X's embed record shows the post has one version (never edited) and no Community Note. x.com blocks automated reading and the Internet Archive could not capture the post page itself, so the archived copies are of X's embed data rather than the rendered page. We could not see replies, so a correction posted only as a reply would not show here. Rep. Pramila Jayapal (@PramilaJayapal)
Compared $300 billion with the fiscal note, OFM's fiscal impact statement and ERFC's forecasts, summed over the windows each covers. Washington Office of Financial Management, Washington Department of Revenue, Economic and Revenue Forecast Council United States 2026 The fiscal note projects $12.894 billion for FY2029-32 and $23.677 billion for FY2029-35; OFM's statement $11.432 billion through FY2031; ERFC's September forecast $12.938 billion for FY2029-31. $300 billion is 23.3 times the four-year figure, 26.2 times OFM's and 12.7 times the seven-year total (our calculation). All are static projections of a tax not yet collected; actual revenue could be higher or lower, or zero if courts strike the tax. None of that uncertainty is anywhere near a factor of twenty. FactHub Research Team FactHub Research Team Office of Financial Management
Read the description of the No on 645 ad linked in the post and the No campaign's legal memo. No on 645 campaign, Pacifica Law Group United States 2026 The ad Jayapal linked, posted by the NO on 645 YouTube channel on Sept. 15, says 645 "gives millionaires and billionaires a 13 billion dollar tax break." The campaign's lawyers trace that figure to the fiscal note: about $12.9 billion between 2029 and 2032. Both are campaign materials. They are cited here only for the figure the campaign itself uses, which is against its interest in this comparison. NO on 645 (YouTube channel) Pacifica Law Group
1. What the post says Read the post through X's own embed record and an independent reader, and archived both copies with the Internet Archive.

Posted from @PramilaJayapal at 7:15 a.m. PDT on Sept. 26, 2026: millionaires and billionaires "are trying to pass I-645, a ballot initiative that would give them a $300 billion tax break by cutting social programs in K-12 schools." X's embed record shows the post has one version (never edited) and no Community Note.

Limit: x.com blocks automated reading and the Internet Archive could not capture the post page itself, so the archived copies are of X's embed data rather than the rendered page. We could not see replies, so a correction posted only as a reply would not show here.

Verify: Post on X, Sept. 26, 2026

2. Every official estimate is near $13 billion Compared $300 billion with the fiscal note, OFM's fiscal impact statement and ERFC's forecasts, summed over the windows each covers.

The fiscal note projects $12.894 billion for FY2029-32 and $23.677 billion for FY2029-35; OFM's statement $11.432 billion through FY2031; ERFC's September forecast $12.938 billion for FY2029-31. $300 billion is 23.3 times the four-year figure, 26.2 times OFM's and 12.7 times the seven-year total (our calculation).

Limit: All are static projections of a tax not yet collected; actual revenue could be higher or lower, or zero if courts strike the tax. None of that uncertainty is anywhere near a factor of twenty.

Verify: Totals by estimate and window of years $300 billion compared with official estimates Fiscal Impact Statement for Initiative 645 (July 2026)

Official estimates of Washington's millionaires tax revenue, by fiscal yearGross income-tax collections projected by the ESSB 6346 fiscal note (March 2026), ERFC's June and September 2026 forecasts, and OFM's I-645 fiscal impact statement (July 2026), state fiscal years 2029-2035.{"width":960,"height":540,"plot":{"left":90,"top":90,"right":926,"bottom":482},"yDomain":[0,6],"series":[{"name":"ESSB 6346 fiscal note (Mar 2026)","color":"#176b87"},{"name":"ERFC forecast (June 2026)","color":"#b6542c"},{"name":"OFM fiscal impact statement for I-645 (Jul 2026)","color":"#684b9b"},{"name":"ERFC forecast (Sept 2026)","color":"#2f7d4a"}],"points":[{"series":0,"x":90,"y":305.73,"xLabel":"2029","yLabel":"$2.7"},{"series":0,"x":229.33,"y":238.18,"xLabel":"2030","yLabel":"$3.7"},{"series":0,"x":368.67,"y":275.09,"xLabel":"2031","yLabel":"$3.2"},{"series":0,"x":508,"y":266.6,"xLabel":"2032","yLabel":"$3.3"},{"series":0,"x":647.33,"y":257.32,"xLabel":"2033","yLabel":"$3.4"},{"series":0,"x":786.67,"y":247.39,"xLabel":"2034","yLabel":"$3.6"},{"series":0,"x":926,"y":236.8,"xLabel":"2035","yLabel":"$3.8"},{"series":1,"x":90,"y":305.73,"xLabel":"2029","yLabel":"$2.7"},{"series":1,"x":229.33,"y":238.18,"xLabel":"2030","yLabel":"$3.7"},{"series":1,"x":368.67,"y":275.09,"xLabel":"2031","yLabel":"$3.2"},{"series":2,"x":90,"y":278.94,"xLabel":"2029","yLabel":"$3.1"},{"series":2,"x":229.33,"y":192.44,"xLabel":"2030","yLabel":"$4.4"},{"series":2,"x":368.67,"y":227.72,"xLabel":"2031","yLabel":"$3.9"},{"series":3,"x":90,"y":253.14,"xLabel":"2029","yLabel":"$3.5"},{"series":3,"x":229.33,"y":153.24,"xLabel":"2030","yLabel":"$5.0"},{"series":3,"x":368.67,"y":194.34,"xLabel":"2031","yLabel":"$4.4"}]}Official estimates of Washington's millionaires tax revenue, by fiscal year$0.0$1.0$2.0$3.0$4.0$5.0$6.0203020322034State fiscal year (ends June 30)ERFC forecast (June 2026)OFM fiscal impact statement for I-645 (Jul 2026)ERFC forecast (Sept 2026)ESSB 6346 fiscal note (Mar 2026)ERFC forecast (June 2026)OFM fiscal impact statement for I-645 (Jul 2026)ERFC forecast (Sept 2026)First payments due April 2029FactHub · Gross collections (billions of dollars)
Official estimates run about $2.7-5.0 billion a year. Four years total about $13 billion; $300 billion would need roughly 80 years at the fiscal note's FY2035 pace (our calculation). View source chart
3. The No campaign's own figure is $13 billion Read the description of the No on 645 ad linked in the post and the No campaign's legal memo.

The ad Jayapal linked, posted by the NO on 645 YouTube channel on Sept. 15, says 645 "gives millionaires and billionaires a 13 billion dollar tax break." The campaign's lawyers trace that figure to the fiscal note: about $12.9 billion between 2029 and 2032.

Limit: Both are campaign materials. They are cited here only for the figure the campaign itself uses, which is against its interest in this comparison.

Verify: Some Things Work Better Upside Down. But Not Washington's Tax System. (Sept. 15, 2026) Memorandum to Millionaires Tax for WA on Initiative 645 (July 2026)

Common questions

“Over enough years, the tax would raise $300 billion.”

Short answer: Not in any estimate

No estimate goes that far. The longest official projection, the fiscal note's, totals $23.677 billion through FY2035. At its FY2035 pace of about $3.75 billion a year, reaching $300 billion would take roughly 80 years (our calculation), and the post gave no time frame.

“It was probably a typo for $13 billion.”

Short answer: Likely, but uncorrected

Probably: the ad attached to the post says $13 billion. But the figure has stayed up without a correction for nearly four weeks, on a post X's data showed had about 248,000 views by Oct. 21. We rate the claim as published and do not call it deliberate.

“The same post: "Working families already pay 3 times more than the top 1% in Washington."”

Short answer: As a share of income

By ITEP's measure, Washington's lowest-income fifth pays 13.8% of income in state and local taxes and the top 1% pays 4.1%, a ratio of 3.4. That supports the line read as a share of income. Read literally, in dollars, it is wrong: at ITEP's average incomes the top 1% pay about $85,000 per household and the lowest fifth about $2,600, roughly 33 times more (our calculation). ITEP is an advocacy group whose incidence assumptions are disputed.

“Repeal isn't a tax break at all, because nobody pays the tax yet.”

Short answer: It is, vs current law

Relative to current law, repeal removes a tax that high earners would owe on income from 2028 on, so calling it a tax cut is fair. The dispute is only about its size, which official estimates put near $13 billion over four years.

Conclusion

The $300 billion figure has no basis in any estimate we could find. The Legislature's fiscal note projects $12.894 billion of gross collections in the tax's first four years and $23.677 billion through FY2035; OFM's ballot statement says $11.4 billion through FY2031; ERFC's September 2026 forecast puts FY2029-31 at $12.938 billion. Against these, $300 billion is 12.7 to 26 times too large. At the fiscal note's FY2035 pace of about $3.75 billion a year, collecting $300 billion would take roughly 80 years (our calculation). The most likely explanation is a slip: the No campaign ad Jayapal linked in the same post calls I-645 "a 13 billion dollar tax break," and the No campaign uses $13 billion everywhere. We cannot know her intent, and we do not call the figure a lie. But the post has stayed up, unedited, for nearly four weeks with no correction from her account that we could find, and we rate the words as published. The same post's other line, that working families pay three times more than the top 1%, holds as a share of income by the measure of the Institute on Taxation and Economic Policy, an advocacy group (13.8% for the lowest fifth vs 4.1% for the top 1%), but not in dollars: the top 1% pay about 33 times more per household (our calculation from ITEP's averages). We rate the $300 billion claim False with high confidence because three independent official estimates and the No campaign's own figure agree on a number more than twenty times smaller. The real figure has its own uncertainty (it is a static estimate, and the tax faces a court challenge), but none of that uncertainty spans a factor of twenty.

How we checked

  1. Found the original post and archived the two readable copies (X's embed record and an independent reader) with the Internet Archive.
  2. Defined the claim as the dollar size of the tax break, as worded in the post, with no time frame stated.
  3. Compared it with every official estimate on the same fiscal-year basis using FactHub's revenue-estimates dataset.
  4. Checked the No campaign's own figure in the ad the post linked and in the campaign's legal memo.
  5. Checked the post's second claim against ITEP's Who Pays? Washington figures and labeled our arithmetic.

Editorial note: Scope: the size of the tax break in Rep. Jayapal's Sept. 26, 2026 post. Whether repealing the tax is good policy is outside this check. The companion article on the No campaign's $13 billion claim covers whether I-645 cuts current budgets. We did not contact Rep. Jayapal's office; the post and its archived copies are linked so readers can check the wording. All dollar figures are nominal.

Expert-review status

No external specialist review has been recorded.

Funding and conflicts

Funding: No external funding for this piece.

Ownership: Published by the FactHub Research Team.

Conflicts: None declared.

Sources

Sources are labeled by kind, with what this fact check takes from each, so readers can check the evidence independently.

  1. Party to the dispute Rep. Pramila Jayapal (@PramilaJayapal). Post on X, Sept. 26, 2026 Free copy

    The post being checked, from the personal campaign account of the U.S. representative for Washington's 7th District. The free copy is the Internet Archive's capture of X's own embed record for the post.

    Reliability: Has a stake in this finding. Jayapal opposes I-645. The embed record shows the post's creation time, text, edit history (one version) and engagement as of Oct. 21, 2026.

    • Jayapal posted that I-645 would give millionaires and billionaires a $300 billion tax break.

      What the source says
      a ballot initiative that would give them a $300 billion tax break by cutting social programs in K-12 schools.
      Post text, second paragraph · Rep. Pramila Jayapal (D-Wash.)

    • Qualifies: The same post said working families pay three times more than the top 1%.

      What the source says
      Working families already pay 3 times more than the top 1% in Washington.
      Post text, first line · Rep. Pramila Jayapal (D-Wash.)
  2. Party to the dispute NO on 645 (YouTube channel). Some Things Work Better Upside Down. But Not Washington's Tax System. (Sept. 15, 2026)

    The No on 645 campaign ad linked in Jayapal's post.

    Reliability: Speaks against its own interest. The No campaign's own ad; its $13 billion figure is against the interest of a No-side claim of $300 billion.

    • The ad linked in the post puts the tax break at $13 billion.

      What the source says
      645 gives millionaires and billionaires a 13 billion dollar tax break while the rest of us pay more.
      Video description
  3. Government Office of Financial Management. Fiscal Impact Statement for Initiative 645 (July 2026)

    OFM's legally required estimate of I-645's fiscal effect, printed in the voters' pamphlet.

    Reliability: Required by RCW 29A.72.025; covers fiscal years 2027-2031.

    • OFM estimates repeal would cost $11.4 billion over fiscal years 2027-31.

      What the source says
      If approved by voters, Initiative 645 will result in an estimated loss to state revenue of $11.4 billion over state fiscal years 2027-2031.
      Summary, p. 1
  4. Party to the dispute Pacifica Law Group. Memorandum to Millionaires Tax for WA on Initiative 645 (July 2026)

    Legal and fiscal memo prepared for the coalition opposing I-645, citing the ESSB 6346 fiscal note.

    Reliability: Speaks against its own interest. Written for the No campaign; its figure is far below the $300 billion a No-side official posted.

    • The No campaign's lawyers put repeal at about $12.9 billion over 2029-2032.

      What the source says
      Repeal of the tax is projected to reduce state revenues by approximately $12.9 billion between 2029 and 2032.
      Section I
  5. Advocacy group Institute on Taxation and Economic Policy. Washington: Who Pays? 7th Edition (January 2024)

    ITEP's estimate of state and local taxes as a share of income by income group, at 2024 law.

    Reliability: Has a stake in this finding. ITEP is a left-leaning tax research group that favors progressive taxation; its incidence assumptions for sales and business taxes are disputed by the Tax Foundation. Figures reflect 2024 law and 2023 incomes.

    • Qualifies: State and local taxes take 13.8% of income for the lowest fifth and 4.1% for the top 1%.

      What the source says
      TOTAL TAXES 13.8% 10.9% 10.9% 9.4% 8% 5.4% 4.1%
      State and local tax shares of family income table, TOTAL TAXES row (lowest 20% to top 1%)

    • Qualifies: ITEP ranks Washington's system the second most regressive.

      What the source says
      These changes caused the state to move 1 spot in the ITEP Inequality Index rankings, from most to 2nd most regressive.
      Overview
  6. FactHub record FactHub Research Team. Totals by estimate and window of years

    Saved analysis summing each official estimate over the fiscal years each covers.

    • Fiscal note FY2029-32: $12.894 billion; FY2029-35: $23.677 billion; OFM FY2027-31: $11.432 billion; ERFC September FY2029-31: $12.938 billion.

  7. FactHub record FactHub Research Team. $300 billion compared with official estimates

    Saved analysis dividing $300 billion by each official window total.

    • $300 billion is 23.3 times the fiscal note's four-year total, 26.2 times OFM's, 23.2 times ERFC's September figure and 12.7 times the seven-year total.

  8. FactHub dataset Washington millionaires tax (ESSB 6346): official revenue estimates by fiscal year

    • Tables: estimates-by-fy

      Saved analysis jayapal-300b-ratio

    • Working families already pay 3 times more than the top 1% in Washington. Now, millionaires and billionaires are trying to pass I-645, a ballot initiative that would give them a $300 billion tax break by cutting social programs in K-12 schools. Make it make sense.
      Pramila Jayapal, U.S. Representative for Washington's 7th District, · In the dataset
  9. FactHub chart wa-millionaires-tax-revenue-estimates-by-fy

Update history

  1. Rated claim changed to Rep. Jayapal's exact words, with "them" explained in the context. New main photo. Disclosure updated to the standard wording. First Look review (grade A, no findings) required no other changes.
  2. Removed the link to a draft version of the companion $13 billion check; it will be restored pointing at the published version.
  3. First draft.

Cited by

Version details

The exact citing versions, and the version of this article each cites.

  • Briefing wa-i-645 — version 6 (published) cites version 3
  • Briefing wa-i-645 — version 4 (published) cites version 3

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