SimpleFunctions

Will Mamdani pass the 2% Millionaire Tax before 2027

Will Mamdani pass the 2% Millionaire Tax before 2027 is priced at 6¢ on Polymarket. Current book: 5¢ bid, 6¢ ask, 1¢ spread. This page tracks a standalone prediction-market contract.

Price history

6¢ current

44¢
0¢25¢50¢
Apr 28, 2026May 21, 2026

Contract brief

Zohran Mamdani has proposed adding a flat 2% tax on New York City residents earning above $1,000,000 annually. You can read more about that here: https://drive.google.com/file/d/14-aM9DKG337SDMilmfQtLRR-pDwyWSTc/view This market will resolve to “Yes” if both the following occur: 1. Zohran Mamdani wins the 2025 NYC Mayoral election. 2. A policy is enacted in New York City before December 31, 2026, 11:59 PM ET, which would establish a tax increase of 2% or more targeting individuals, households, or family units with an income of at least $1 million (USD or equivalent). When the proposed tax goes into effect (e.g., if a qualifying tax is enacted for the 2028 fiscal year) will have no bearing on this market's resolution, so long as the policy has actually been enacted within this market's timeframe. The policy will be considered to have been enacted if a local or state law is passed, or mayoral executive order is issued which will bring the stated tax into effect within the specified timeframe. The introduction, proposal, or announcement of such a policy without legal enactment will not qualify. Policies which include limited exceptions—such as such as exceptions for specific families, asset classes, etc.—will still qualify as long as a general tax as described is enacted. If Mamdani is confirmed to have lost the 2025 NYC Mayoral election by a consensus of credible reporting, or if the stated terms are not satisfied within this market's timeframe, this market will immediately resolve to “No”. The resolution source for this market will be a consensus of credible reporting.

Outcome

Will Mamdani pass the 2% Millionaire Tax before 2027

Rank

Standalone

Leader

Range

Family volume

$59K

Identifier

0x7076d314...75c4

May 28, 2026, 10:08 AM UTC · 27m ago

Implied probability

6¢
Latest venue quote
May 28, 2026, 10:08 AM UTC · 27m ago

Bid

Ask

Spread

24h volume

$3

Family rank

Standalone

Standalone contract

Closes

Dec 31, 2026

Family volume

$59K

Orderbook snapshot

5 / 6¢

Polymarket
1¢ spread
BidSize
100¢5.1K
5¢1.2K
4¢3.6K
3¢2.3K
2¢8.1K
AskSize
6¢859
7¢392
8¢147
9¢70
11¢70
12¢13
13¢76
15¢76

Contract terms

What resolves this market.

YES condition

Zohran Mamdani has proposed adding a flat 2% tax on New York City residents earning above $1,000,000 annually. You can read more about that here: https://drive.google.com/file/d/14-aM9DKG337SDMilmfQtLRR-pDwyWSTc/view This market will resolve to “Yes” if both the following occur: 1. Zohran Mamdani wins the 2025 NYC Mayoral election. 2. A policy is enacted in New York City before December 31, 2026, 11:59 PM ET, which would establish a tax increase of 2% or more targeting individuals, households, or family units with an income of at least $1 million (USD or equivalent). When the proposed tax goes into effect (e.g., if a qualifying tax is enacted for the 2028 fiscal year) will have no bearing on this market's resolution, so long as the policy has actually been enacted within this market's timeframe. The policy will be considered to have been enacted if a local or state law is passed, or mayoral executive order is issued which will bring the stated tax into effect within the specified timeframe. The introduction, proposal, or announcement of such a policy without legal enactment will not qualify. Policies which include limited exceptions—such as such as exceptions for specific families, asset classes, etc.—will still qualify as long as a general tax as described is enacted. If Mamdani is confirmed to have lost the 2025 NYC Mayoral election by a consensus of credible reporting, or if the stated terms are not satisfied within this market's timeframe, this market will immediately resolve to “No”. The resolution source for this market will be a consensus of credible reporting.

Venue

Polymarket

Closes

Dec 31, 2026

Identifier

0x7076d314…75c4

SF Signal
SF Index
1320.16
Regime
neutral

Cross-venue match

Similar contract on kalshi at , -3¢ versus this page.

View counterpart

Event family

Will Mamdani pass the 2% Millionaire Tax before 2027.

The same race as a probability stack: rank, volume, and where this contract sits against the other outcomes.

Total volume

$59K

Outcomes

1

Highest price

Will Mamdani pass the 2% Millionaire Tax before 2027 6¢

Current share

100%

Indicators

Yield, cliff risk, volatility, and regime.

Regime

neutral

Score

0.409

Observability

medium

Event type

political

Full indicator table

2640.3%
10.8%
Adj IY
1320%
16

Related readings

Matched from SimpleFunctions blog, opinions, technical guides, concepts, and learn pages.

Browse library
Blogmarkets

Kalshi vs Polymarket: Which Prediction Market Should You Trade?

In-depth comparison of Kalshi and Polymarket for prediction market traders. Regulatory structure, liquidity, fees, API tooling, and cross-venue trading with SimpleFunctions.

Blogpolitics

Gavin Newsom December 2025: How California’s Governor Is Shaping the 2028 Presidential Odds

In-depth look at Gavin Newsom’s status in December 2025, his California record, and what prediction markets are signaling about his 2028 presidential chances.

Conceptmethodology

Maker / Taker Regime in Prediction Markets: How to Read the Orderbook State

Three regime states (maker-dominated, taker-dominated, neutral) and how to read which one a Kalshi or Polymarket contract is in. Strategy follows regime, not thesis.

Blogmacro

US Recession 2025? What 1% Prediction Market Odds Get Right—and Wrong—About the Cycle

Prediction markets put 2025 US recession odds near 1%, while yield curves, economic indicators, and institutional forecasts point to much higher risk. This deep dive compares market pricing to historical base rates, Federal Reserve policy, and forecasting models to see if investors are underpricing recession risk.

Opinioncomparison

Kalshi vs Polymarket: Mechanics, Fees, Regulation, Liquidity (2026)

Side-by-side comparison of Kalshi and Polymarket in 2026. Fee math, calibration data, withdrawal speed, and a decision tree for picking the right venue.

Conceptmethodology

Reflexivity Loops in Election Markets: When Price → Consensus → Price

Election prediction markets have a feedback loop where price becomes news becomes price. How the loop works, the 2024 case study, and how to size trades against it.

SimpleFunctions context

Index, screen, query, and monitor.

Open index

How we compute these odds

SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.

For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.

Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.