Problem

Professional tax firms are still forced to run core tax work through decades-old desktop software and a disconnected patchwork of portals, document tools, spreadsheets, and manual or robotic integrations. The operational pain is concentrated between receiving client documents and beginning tax review: staff must chase missing W-2s, 1099s, K-1s, and brokerage statements, transcribe figures, and assemble workpapers. Luca IQ frames tax preparation as one of the largest remaining categories of unautomated knowledge work, while an aging CPA workforce makes labor efficiency increasingly important.

The killer use case is high-volume individual-return preparation for CPA firms: turning a client’s uploaded source documents into a complete, review-ready return with traceable inputs. The economics are straightforward—more returns per preparer, less administrative and outsourced labor, and greater operating leverage for firms and private-equity groups acquiring accounting practices. Luca IQ says its workflow automation has saved some customers more than 1,100 hours in a busy season and reduced administrative preparation time by 57%.

Product / Service

Luca IQ is a B2B workflow platform and API-first tax engine sold through accounting and tax firms rather than directly to taxpayers. Its workflow product includes a branded client portal, auto-drafted intake, document classification, automatically assembled workpapers, firm-level status analytics, and e-signatures. Clients upload source documents without needing a login; Luca IQ reads and organizes them, maps values to the relevant return lines, flags missing or attention-worthy items, and prepares a structured file for the tax professional.

The newly launched tax engine calculates returns with deterministic, rules-based logic rather than using AI to perform the tax math, creates an audit trail linking each figure to its source document and rule, and transmits completed returns directly to the IRS through Luca IQ’s authorized e-file infrastructure. The API is designed to return a completed return as structured data, a formatted PDF, or an IRS-filed return, allowing firms and fintechs to connect tax filing to their own systems while retaining human review. Luca IQ claims an average path from intake to review-ready in 30 minutes, replacing manual data entry while keeping a CPA responsible for the final filing.

Market

Luca IQ competes in professional tax-preparation software, accounting-firm workflow automation, and tax infrastructure APIs. Its primary incumbents are established professional tax suites such as Intuit ProConnect and ProSeries, Drake Tax, Lacerte, CCH Axcess Tax, and Thomson Reuters UltraTax CS. Luca IQ’s differentiation is not simply another preparation interface: it is attempting to replace the closed, desktop-centered stack with an integrated workflow layer and an API-accessible calculation and e-filing core. Its customer base is explicitly CPA and tax firms, with adjacent demand from private-equity firms rolling up practices and developers or fintechs that need embedded 1040 calculation and filing.

The company is at an early commercial-launch stage rather than an established scale player. It launched its IRS-authorized, e-file-approved engine on July 31, 2026, is an active Y Combinator Summer 2026 company with a five-person team, and says it completed its first tax season with customers. Public materials report more than 1,100 hours saved by some firms, hundreds of firms having applied, and a limited pilot or founding-member cohort for the 2026 tax season. No public revenue figure was found, so its revenue status cannot be confirmed; the available evidence supports calling it early commercial traction, not definitively pre-revenue.