---
title: RATIO
created: 2026-10-16 03:28
updated: 2026-10-16 03:28
revision: 1
author: Auriea
summary: "new page: RATIO, the studio ledger"
---

[[TROY]]

RATIO (Latin, "reckoning, account") — a studio ledger for expenses and business travel, kept one tax year at a time. Log what was spent and why, log the trips, link the two, and hand the year to the accountant as a single CSV.

[[thumb:Ratio-Ledger|800]]

*(sample entries, not a real year)*

## What it does

- **Expenses** — date, vendor, category, amount and currency, an optional trip, and a note on what it was for and why it's a business cost. Eight categories: supplies & materials, travel, studio & rent, software & subscriptions, fabrication & printing, shipping, professional services, other.
- **Currencies stay as paid** — EUR, USD, GBP or other, recorded as spent; converting is left for the end of the year.
- **Trips** — destination, dates and business purpose; each trip shows how many expenses are linked to it and what they come to. Removing a trip keeps its expenses.
- **One year at a time** — the year picker filters everything; the strip at the top shows the three biggest categories and the year's total. The table filters by category or by trip.
- **Export CSV** — the year's expenses with their trips and purposes, then the category totals, then the trip list, all in one file.

The look is a ledger book: Fraunces and Inter, warm paper, hairline rules instead of cards, brick red for categories and verdigris — bronze patina — for trips. Light and dark.

## Private by design

Everything stays in this browser's storage and nothing is sent anywhere. That also means it lives on one device only, and the export is the backup.

## Not yet

No editing an entry (only add and delete), no receipts attached, and the totals add up the numbers as entered whatever their currency. It began as a Claude.ai artifact called *Ledger*, and its CSV button still uses the artifact's download hook — outside Claude.ai it opens the CSV as text instead of saving a file.

Lives in TROY/RATIO (ratio.html) — local only, not deployed.

[[tag:ai]]