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Crimson Tree Software

Built by a precision engineering team with 25 years of subject matter experience. TIERS is powered by Second Wind Foundry, an AI orchestration platform for regulated industries.

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AboutOur Work

OUR WORK. 25 years of partnership tax innovation.

For more than 25 years, our solutions have served the largest public accounting firms and US partnerships.

Partnership TaxDocument AITax Calc Libraries

Viewing Partnership Tax · Matching milestones are marked in the timeline below. Show all

Engineer building TIERS partnership tax automation on dual monitors

8 milestones · jump nav

2026

Tiers AI

TIERS AI next-generation solution.

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2024

Partnership Document Intelligence

Sale of Document Intelligence system and related inventions to a Big 4 firm. Widespread rollout in year one. AI and ML comprehension of K-1s, K-3s, footnotes, and associated tax documents.

2020

Cloud-First Partnership Tax Compliance

Sale of cloud-first partnership tax compliance system to an international firm. Nine-figure ROI in year one. GAAP-to-tax tiering, real-time analytics, and direct K-1 production.

2018

Automated Document Extraction

Experimental machine learning system to automate the extraction of structured data from K-1s and footnotes eliminated 30,000 labor hours in the first busy season of use. Machine learning and heuristic extraction from tax forms and complex footnotes — before modern LLMs.

2017

Partnership Modeling Platform

Development of a deep partnership modeling platform for Big 4 National Office M&A practice. Used to model and propose Up-C conversions of the largest publicly traded US PE entities. Three-year collaboration including Up-C conversions for prominent publicly traded entities.

2013

Sub K Tiering and Allocation Engine

Sale of breakthrough Sub K tax allocation engine and related inventions to Big 4 firm. Over next three years, developed it into the market-leading platform. In-memory, parallel Subchapter K allocation — the foundation of a comprehensive GAAP-to-tax compliance system.

2011

In-Memory Analysis

Developed in-memory analysis and ubiquitous parallel processing techniques.

2001

Company Founded

Pioneered early software solutions for partnership tax, including 704(b), 704(c), and 752 allocation logic.

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