Tools chosen: kalshi_direct kalshi_related polymarket_related fred claude_news gdelt_news code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a Kalshi economics question resolving on whether IRS tax collections in 2026 exceed 2025, so the market price plus historical base rates of year-over-year IRS/federal receipts growth are the core anchors. Key uncertainty is the revenue effect of the One Big Beautiful Bill Act's tax cuts taking effect in 2026 (bonus depreciation, no tax on tips/overtime, higher SALT cap) against nominal GDP growth and rising wages/capital gains. I need the resolution source definition (IRS gross collections vs Treasury receipts, calendar vs fiscal year) plus current-year monthly receipts run-rate.

# Current state The market resolves based on whether IRS gross tax collections in tax year 2026 exceed tax year 2025, likely referencing IRS Data Book / Treasury fiscal receipts data published after year-end. No official 2026 full-year figure exists yet; monthly Treasury receipts data through mid-2026 and CBO's February/July 2026 Monthly Budget Reviews are the best current signals, both pointing toward higher nominal revenue despite OBBBA tax cuts. # Timeline of key events - 2025-07 (confirmed): OBBBA enacted, cutting individual/corporate tax revenue via new deductions (tips/overtime, SALT cap expansion, bonus depreciation) — CBO reduced individual income tax revenue projections by $4.4T over 10 years (americanactionforum.org). - 2025 (confirmed): IRS staffing cut ~27% (102k→74k employees) amid DOGE-driven cuts; high-income audits sharply reduced (Forbes, taxlawcenter.org). - 2026-02 (confirmed): CBO February 2026 Budget Outlook projects FY2026 revenue rising as share of GDP (17.5%→17.8% by 2036) and in nominal terms, driven partly by new tariff revenue ($77B in 2024 → $421B projected 2027) (CBO, CRFB). - 2026-04 (reported): Treasury officials tout AI/automation offsetting IRS staffing cuts during 2026 filing season (Federal News Network). - 2026-07 (confirmed): CBO's July 2026 Monthly Budget Review shows non-tariff federal revenues (income+payroll) up $50B vs its own February 2026 estimate — actual collections running ahead of even CBO's already-rising baseline (CAGW, House Budget Committee). - 2026-08 (reported): FY2026 federal budget deficit projected to reach ~$2.1T, implying revenue growth not keeping pace with spending, but not necessarily a YoY revenue decline (Fox Business). # Event Will nominal IRS/federal tax collections in 2026 exceed those in 2025? # Outcomes to forecast - Yes (2026 collections > 2025) - No (2026 collections ≤ 2025) # Kalshi market anchor KXIRSCOLLECT-26 YES currently priced at **82%**, essentially flat over 7 days, +1% over 30 days, range 74–90% over 42 days of data. Thin liquidity (avg ~77 contracts/day). This is a strong consensus lean toward Yes, moderated by a wide historical trading range suggesting some uncertainty has existed. # Sub-question answers 1. **Kalshi price/history & 2025 version**: Current YES = 82%, low-volume, traded 74–90% over the past 42 days; no data found on a resolved 2025-vintage market or its outcome (kalshi_direct; no direct info on prior-year market). 2. **30-year base rate of YoY IRS/federal receipt increases**: 79.4% of years (27/34, FY1990–2024) saw nominal increases; excluding 6 recession years, rate rises to 92.9% (26/28) (code_execution analysis of federal receipts data). Declines occurred in FY1991, 2002-03, 2008-09, 2020, and FY2023 (post-surge normalization, −9.3%). 3. **FY2026 monthly receipts vs FY2025**: FRED MTSR133FMS monthly data show comparable magnitude/seasonality between FY2025 and FY2026 months (e.g., Sept 2025 $543.7B vs. April 2026 $837.3B reflecting seasonal tax-filing peak); direct cumulative YTD comparison not computed in raw data, but CBO's July 2026 MBR confirms revenues running $50B above CBO's own February 2026 forecast (CAGW/House Budget Committee). 4. **CBO/Treasury 2026 revenue projections given OBBBA**: CBO cut individual income tax revenue estimates by $4.4T (10-yr) and corporate by $352B due to OBBBA, but tariffs (ending de minimis exemption: +$59B) and stronger-than-expected economic growth are projected to make total nominal revenue rise in 2026, not fall (AAF, CRFB). 5. **Resolution source coverage (FY vs CY)**: Not explicitly stated in rules; likely references IRS Data Book (fiscal year gross collections, published following spring) or Treasury fiscal receipts (FYFR, FRED) — FY2025 gross federal receipts were $5.236T vs FY2024's $4.920T (FRED FYFR), the presumptive figure 2026 must beat, though official IRS Data Book YoY comparisons could differ from Treasury fiscal receipts. 6. **Wage growth/employment/capital gains offsetting cuts**: Not directly quantified in raw research; code_execution model assumes 4–5% nominal GDP growth (consistent with FRED GDP data: $31.42T Q4-2025 → $32.49T Q2-2026, +3.4% growth in two quarters) partially offset by an estimated 2–4% OBBBA structural revenue drag, netting to a modest but positive expected growth. # Key facts (high-confidence, factual) 1. [FRED FYFR] FY2025 federal fiscal receipts: $5.236T vs FY2024: $4.920T (+6.4% YoY). 2. [CBO/CRFB] CBO Feb 2026 baseline projects revenue rising as % of GDP through 2036 despite OBBBA. 3. [AAF] OBBBA cuts individual income tax revenue by $4.4T and corporate by $352B over 10 years (relative to prior baseline, not necessarily YoY decline). 4. [CAGW/House Budget Cmte] CBO's July 2026 MBR shows non-tariff revenues $50B above February 2026 estimate — actuals beating even the optimistic baseline. 5. [Forbes/Yale Budget Lab] IRS staffing down 27% in 2025; Budget Lab estimates ~$600B revenue loss over FY2026-2035 from weakened enforcement — a multi-year drag, not necessarily enough to flip single-year YoY direction. 6. [code_execution] Historical base rate: nominal federal receipts rose in 79-93% of years absent recession (1990-2024). # Cross-market signals - Kalshi related: No directly comparable resolved series found; series KXIRSCOLLECT shows no other active markets for comparison. - Polymarket: No matching markets found (0 hits across IRS/tax revenue keywords). - Sportsbook implied: N/A (not applicable to this event type). # Analyst opinions and speculation - CRFB/AAF frame 2026 revenue rise as driven substantially by tariffs, not organic growth — a fragile support if trade policy shifts. - Budget Lab/Tax Law Center emphasize enforcement decline as a multi-year drag, more relevant to out-year totals than a single-year YoY comparison. - Treasury officials counter that AI/automation is offsetting staffing losses, supporting the "revenue still rises" narrative. # Directional lean per outcome - **Yes**: Historical base rate strongly favors increases (79-93% ex-recession); CBO's own outlook and July 2026 MBR show revenue beating projections; tariff revenue is a new incremental source; GDP still growing nominally (~7% over two quarters per FRED); Kalshi priced at 82%. - **No**: OBBBA's structural tax cuts (~2-4% revenue drag), historic IRS enforcement staffing cuts (–27%), and a slowing economy (retail sales declining July 2026, rising deficit) create meaningful downside risk; quantitative modeling (code_execution) suggests raw probability closer to 58-65% before accounting for actual 2026 data trends, below the Kalshi price of 82%. # Gaps / unknowns - No confirmed cumulative FY2026 YTD vs FY2025 YTD total collections figure. - Unclear exact resolution source (IRS Data Book vs Treasury monthly receipts) and whether fiscal or calendar year basis — could affect which components (tariffs collected by Customs, not IRS) count. - No data on how the 2025-vintage IRS collection market (if any) resolved. - Full-year 2026 data won't be finalized until spring 2027, well after most current signals. # Calibration anchors - Kalshi current YES price: 82% (primary anchor). - Model-based estimate (code_execution): ~58-65% probability of increase given OBBBA drag vs GDP growth. - CBO/Treasury real-time data (July 2026 MBR): revenues tracking above baseline, supporting Yes. - Historical precedent: nominal federal receipts have risen in ~93% of non-recession years over 30+ years.

1. Both forecasts converge tightly around 81-85%, essentially anchoring on Kalshi's 82% with minimal adjustment, yet neither seriously engages with the brief's own model estimate of "58-65% probability of increase" (code_execution) — a substantial divergence that deserves explicit reconciliation rather than being waved away as "second-order." 2. Neither forecaster adequately addresses the critical resolution-source ambiguity flagged in the brief: "Unclear exact resolution source (IRS Data Book vs Treasury monthly receipts)... could affect which components (tariffs collected by Customs, not IRS) count." If the market resolves on IRS-specific collections excluding tariff revenue (collected by Customs, not IRS), the bullish tariff narrative ($77B→$421B projected) used by both forecasters to support Yes may be largely inapplicable, meaningfully lowering the true Yes probability. 3. Forecast 1's claim that "IRS gross collections are measured before refunds, so OBBBA's new deductions and larger refunds hit net rather than gross figures less severely" is a plausible but unverified inference not found anywhere in the brief — this is an unsupported assumption presented with unwarranted confidence that materially affects the reasoning. 4. Neither forecast grapples with the FY2023 precedent cited in the brief — a "post-surge normalization, −9.3%" decline that occurred without a formal recession — suggesting the "92.9% non-recession base rate" may overstate the true base rate when unusual prior-year comparisons or policy shocks (like OBBBA) are in play, which is analogous to 2026's situation. 5. Both forecasters treat the widening deficit signal ("FY2026 federal budget deficit projected to reach ~$2.1T") as a non-issue for revenue direction, but neither explores whether this partly reflects revenue underperformance relative to expectations rather than pure spending growth, which would cut against the Yes case more than acknowledged. 6. Neither forecast discusses why Kalshi's 42-day range is so wide (74-90%) despite an ostensibly stable macro picture — this volatility on thin liquidity (~77 contracts/day) suggests genuine uncertainty or information asymmetry that both forecasts should treat as a signal for wider variance rather than simply anchoring near the current point estimate.

83% (64% confidence)

Yes: 83% No: 17%

The Kalshi anchor (82%) and the historical base rate (79% of all years, ~93% of non-recession years show nominal receipt increases) both point strongly to Yes, and the strongest real-time signal — CBO's July 2026 MBR showing non-tariff (income + payroll) revenues running $50B above the February baseline — directly addresses the critique's tariff-exclusion concern: even on an IRS-only basis, collections are tracking above an already-rising forecast. The devil's advocate is right that the code_execution 58-65% model estimate deserves weight, but that model appears to have been run before incorporating the actual 2026 collections data, which resolves much of its uncertainty in the Yes direction. The FY2023 precedent (a non-recession −9.3% decline) is a genuine warning that policy/normalization shocks can flip the sign, and OBBBA's withholding-table changes plus a 27% IRS staffing cut are real drags, which is why I hold ~17% on No rather than pushing to 90%. Net, I stay essentially at the market price, with the wide 74–90% thin-liquidity range and resolution-source ambiguity justifying no aggressive deviation in either direction.

Total pipeline time: 172.6s