Purpose-built AI for compliance, advisory and audit.

Safe & secure AI that does real work. Onsen is an always-on AI workforce helping to optimize tax, reduce busy-work, and drive advisory outcomes. Every workflow, decision, and interaction is audit-defense stored.

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IRS Revenue Ruling · Today

Rev. Rul. 2026-08 — §41 R&D credit qualification

Affects 1 client

Treasury clarifies 1099-paid contractor costs qualify as research expenses when work product is owned by the taxpayer.

Clients in your book that match

TechSpark Studios

S-corp · software / SaaS

Est. credit Δ

+$24K–$36K

Draft memo →

§301.7216-compliant by architecture

Tax- and client-safe AI tooling

Enterprise-grade security

Firms are feeling the squeeze.

High-value, high-volume work is piling up — and the AI shortcuts you've been promised create more risk than relief.

40%+

Firm time spent chasing clients & "busy work"

$25B+

In advisory services opportunities missed

$70B

In tax optimization left on the table due to changing and unclear tax laws, like OBBBA

AI was supposed to help — but most solutions are not §7216-compliant, they don't know your clients, and they're often wrong.

A tax- and client-aware AI workforce.

Built from the ground up, to help your firm optimize tax, grow advisory revenue and just do more — all on an audit-defense architecture.

Governance

Partner approval gate on every financial write. §301.7216-compliant by architecture. Immutable audit trail on every decision.

Context & Knowledge

Complete and dynamically updated federal and state tax corpus. Deep understanding of client books.

Product & Interfaces

Purpose-built workspaces that complement and anticipate your workflows.

Agentic Harness

Fit-for-purpose agentic tax system combining a citation-driven, expert knowledge base with audit-proof governance to get real work done.

Three outcomes that change the firm's economics.

What Onsen delivers today, at the firm level.

Up to

26 hrs

per month saved per CPA

Up to

$54K

in tax optimization capture per average firm

Up to

$360K

in new advisory revenue — without hiring

Onsen at work.

Three of the workflows running in pilot today. Each one shows the same pattern: Onsen does the heavy lift, the partner reviews and approves, and every decision lands in your audit trail.

Tax Digest · Jul 24

IRS Revenue Ruling · Today

Rev. Rul. 2026-08 — §41 R&D credit qualification

Affects 1 client

Treasury clarifies 1099-paid contractor costs qualify as research expenses when work product is owned by the taxpayer.

Clients in your book that match

TechSpark Studios

S-corp · software / SaaS

Est. credit Δ

+$24K–$36K

Draft memo →

Tax-law monitoring

Daily tax-change digest — matched to your book.

Onsen scans IRS rev-ruls, Treasury notices, and state DOR releases every morning, then matches each rule against the entity types, industries, and prior-year filings of every client in your book. You only see the rules that actually touch your roster.

✓ Client-aware filtering — no noise, only what hits your book
✓ Estimated credit / liability delta per affected client
✓ One-click "draft memo" with full citation chain

Tax optimization

Reasonable-comp scans before year-end, not after.

Onsen runs quarterly scans across every S-corp client, projecting full-year owner comp from YTD data and comparing it against defensible BLS OES benchmarks. Under-comp exposure, excess payroll tax, and election opportunities surface 91 days before year-end — while payroll can still be adjusted.

✓ Portfolio-level scan — every S-corp client, every quarter
✓ Dollar exposure quantified (FICA gap, excess payroll tax)
✓ Sources cited — BLS OES, RCReports, IRS FS 2008-25

S-Corp Scan · Q4 2026

7 clients

Oct 1, 2026 · 91 days to year-end

2 flagged 1 opportunity 2 clean 2 need data

Mountain View Dental Under-comp

~$7,191 FICA exposure

Projected comp: $38,000 · Benchmark: $85K–$115K (BLS OES)

⏱ 91 days to true up before Dec 31

Smith CPA Group · QBR

Cool Cars LLC — Q1 2026

Pending review

Executive summary

Onsen-composed

Revenue grew 6.6% YoY to $168,500 — driven by a shift toward higher-margin service labor (service +14%, parts −8%).
AR concentration risk: Sterling Auto Fleet owes $4,200 of $4,400 in 90+ day balances — recommend tightening fleet terms to net-45.

Quarterly business reviews

QBR packets, composed and ready for partner review.

Onsen pulls QBO data, runs variance analysis, drafts the executive summary, and composes a partner-ready QBR. The narrative is grounded in the books — every claim cited — and pending your sign-off, never auto-sent.

✓ AI-composed executive summary with cited claims
✓ Material variance threshold tuned per client (e.g. >10% AND >$5K)
✓ Partner review gate — draft sits until you approve

Work papers and audit defense made easy.

Every action taken on the platform is recorded and stored in Decision Record — the source it read, the reasoning it followed, the human who approved it. In two years, if an auditor asks "why was that decision made?", you have a defensible answer in two clicks.