CFO • Builder • AI Practitioner

I write about using AI to do better finance work. From the CFO seat.

Free practitioner guides on building Claude finance agents, Cowork plugins for capital markets, AI-powered DCF dashboards, and Excel automation. No theory. Just production-tested workflows from the CFO seat.

5+ years building high-performance finance teams
€200M+ raised across capital markets
2+ yrs testing AI in production finance
CFO ESTO Group, Baltics

AI Finance Guides & Resources

Practitioner's notes on using AI in finance. Everything here has been tested in a real finance function, not in a sandbox.

Updated March 2026

01

Guides

Featured Free

The Full Claude Guide to SEC Filing Signal Automations

Build automated signal systems that monitor SEC filings in real-time, classify corporate events using AI, and deliver actionable alerts to your phone within minutes. Full implementation walkthroughs for loan covenant violations and auditor changes.

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Featured Free

Building AI Agents with 3 Text Files

A practitioner's guide to building repeatable, shareable AI agents using START, TASKS, and MEMORY files inside Claude Cowork. No code. No API keys. Includes two real production examples from finance workflows.

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New Free

From Annual Report to Interactive Dashboard

How to use Claude Skills to build, secure, and deploy investment banking-grade financial model dashboards. Covers skill creation, the 5-minute execution workflow, password protection, authentication layers, and hosting on Netlify.

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Free

The Full Claude Guide to Excel for Finance Specialists

Setup, prompts, Cowork plugins, prompt engineering principles, and an honest assessment of limitations. Everything you need to start using Claude in Excel for real finance work.

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Free

Claude Cowork Plugins for Capital Markets

A reference guide to every Cowork plugin relevant for capital markets work, including LSEG, S&P Global, and custom GitHub-based skills for financial analysis.

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02

My AI Stack

Primary
Claude
Anthropic

My daily workhorse for production finance. I use it for building repeatable agents (START/TASKS/MEMORY), running Cowork plugins (LSEG, S&P, GitHub), creating interactive DCF dashboards, prompt engineering, and secure Excel workflows. Most of the guides on this site were built with Claude.

Daily Driver
Grok
xAI

Best for complex multi-step reasoning, real-time X/web search, and finance deep-dives without heavy safety rails. I use it for market sentiment analysis, quick validation of controversial finance topics, and getting fast answers that other models hedge on.

03

Opinions

Opinion

Milton Friedman, spoons, and why most teams are implementing AI wrong.

Why "replace a few people with AI and save costs" caps your upside and completely misses the real opportunity. The better question: if we built this process from zero today, what would it actually look like?

2 Mar 2026
Read more ↓

I heard from a colleague an analogy about the current state of AI that resonates quite nicely with what I think is happening at the moment.

Milton Friedman was once touring a construction site overseas. Workers were moving earth with shovels instead of machinery. When he asked why, the host said it was to preserve jobs. "Then why not give them spoons?" Friedman replied.

That story is 50+ years old and the logic hasn't changed. Every time a better tool shows up, the first instinct is to protect the old workflow instead of rethinking the work itself.

Consider what finance looked like before Excel. Well, obviously (and fortunately) I would not know first hand, but from what I've read and heard: spreadsheets were literal sheets of paper. Consolidation meant a team of people with calculators cross-checking numbers for days. Forecasting was a quarterly event because it physically took that long.

Nobody using Excel today can even imagine going back. But when it first appeared, the conversation was the same: "This will eliminate jobs." It didn't. It eliminated tasks. And the people who learned to use it properly became 10x more valuable than those who resisted.

AI in finance is the same story playing out again. After discussing this with a forward-thinking bank CEO, something clicked for me. The mistake most teams make is treating AI as a cost-cutting exercise. "We'll automate a few roles, save some headcount." That thinking puts a ceiling on what you can actually achieve.

The question worth asking instead: if you had to design this process from scratch today, with full knowledge of what AI is capable of, would it look anything like what you currently have? In almost every case the answer is no. Entire steps become redundant. Others consolidate. Work that used to be impossible becomes straightforward.

Getting there is not easy. Redesigning workflows from first principles requires significantly more effort than simply plugging AI into an existing seat. But that is where the compounding returns actually come from.

From what I've seen so far, AI increases quality and output per person so much that it doesn't necessarily require replacing anyone. The process redesign will come naturally once teams actually start using it and realize what's possible. And as always, the best is yet to come.

Therefore, I am not worried about AI replacing finance professionals. I am worried about finance professionals who refuse to rethink their work with AI. Those are two very different problems, and only one of them is actually solvable.

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05

Articles

Coming Soon

Longer-form writing on AI in finance

In-depth analyses, case studies, and frameworks. Subscribe to get notified when the first article drops.

Gustav Juurikas, CFO and AI finance practitioner building Claude Cowork workflows

I'm Gustav. CFO in fintech, and I use Claude across almost everything I do.

I work in capital markets and corporate finance in the Baltics. My days are split between Excel models, board presentations, creditor calls and negotiations, and the kind of cross-functional work that never fits neatly into one tool.

I started using Claude because I needed to move faster. Once I understood how my processes were actually built, curiosity took over: I wanted to find better ways to run them. It turned out to be useful across more of my workflow than I expected: financial models, investor decks, due diligence reviews, drafting covenant trackers, even building ad-hoc tools to manage day-to-day operations.

I like to teach and share what I've learned, so I decided to start writing it down. What you'll find here are practitioner's notes on using AI in finance: guides, workflows, and honest takes written for finance professionals who want to skip the hype and see what actually works.

5+ yrs
Building High-Performance Finance Teams
€200M+
Raised Across Capital Markets
2+ yrs
Testing AI in Production Finance
CFO
ESTO Group, Baltics

AI across the full finance workflow.

01

AI in Excel & Financial Modeling

Building DCFs, debugging formulas, creating covenant trackers, sensitivity tables, loan tape analysis, and easily viewable financial results summaries. The stuff that takes hours and now doesn't have to.

02

Presentations & Board Materials

Using AI to draft investor decks, board packs, and earnings materials. Cross-app workflows from spreadsheet to slide.

03

Capital Markets & the Modern CFO

How AI changes the way companies raise capital, manage creditor relationships, and run a finance function at scale.

04

Practical Prompt Engineering

The techniques that separate generic AI output from work you'd actually send to a counterparty. Tested in production, not in a sandbox.

Practical Real workflows, not LinkedIn thought leadership.
Honest What works, what doesn't, and what to watch for.
Tested In a finance function, not in a sandbox.

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