Expense Sheet Design Skill

Expense tracking has one law: it happens at spend-time or it happens badly. The March reconstruction — a shoebox of receipts, a statement, and archaeology — produces worse data at fifty times the cost of a fifteen-second capture habit. The sheet's design serves that habit: columns light enough to fill from a phone, categories that map to the downstream consumer's rules (the reimbursement policy, the tax return's lines — not aesthetic taxonomy), receipts linked not shoeboxed, and a month-end close that's minutes because every entry already exists.

What This Skill Produces

• The sheet structure — the capture-light column set (date, amount, merchant, category, receipt-link, notes-if-odd), one row per expense
• The category set — mapped to the actual downstream: the employer's reimbursement categories, or the tax return's deduction lines (jurisdiction-flagged), never invented ontology
• The capture ritual — the fifteen-second at-spend habit: photograph receipt → one row → done
• The month-end close — reconcile against the statement, chase the gaps, subtotal by category, file the export

Required Inputs

Ask for these if not provided:

• The downstream consumer — reimbursement (get the policy's categories and rules — per-diem? caps? receipt thresholds?), tax deductions (the return's categories — via the local professional per quarterly-tax-rhythm discipline), or just visibility; the categories are theirs, not ours
• The spend surfaces — cards (which), cash frequency, subscriptions (auto-captured monthly rows), mileage/travel if relevant (their own capture rules)
• The volume and the users — solo (one sheet, one habit) vs. team (submission rules and the approver's view enter the design)

Framework: The Design Rules

1. Capture-light or capture-never: the row takes ≤15 seconds from a phone: date (auto-ish), amount, merchant, category from a dropdown, receipt photo linked. Every additional required field taxes the habit; notes are for the odd expense, not every expense.
2. Categories are the downstream's, verbatim: if the reimbursement policy has nine categories, the dropdown has those nine, spelled identically — month-end becomes transcription instead of translation. Tax-facing sheets use the return's deduction lines, flagged verify-with-the-professional; a beautiful custom taxonomy that maps to nothing is future manual work, scheduled.
3. The receipt lives with the row: photo at spend-time into one folder (filename-convention: date_merchant_amount), link in the row — the shoebox is retired. Receipt-threshold rules (many policies/authorities only require receipts above X — verify) noted so effort matches requirement.
4. The statement is the auditor: month-end close = statement vs. sheet — missing rows chased while memory exists (the 15-minute version of March's archaeology), duplicates caught, then category subtotals produced in downstream-ready form. The close is fast because capture happened; it is not the capture mechanism.
5. The odd ones get their note now: the client-dinner attendees, the mixed personal/business split, the why of the weird charge — one line at capture-time, because these are exactly the entries that are inexplicable in March and the ones auditors ask about (the document-retention-map keeps the records as long as they can ask).

Output Format

Expense Sheet: [scope] — feeds: [reimbursement policy / tax return / visibility]

The Structure

[Columns with the ≤15-second test applied · the dropdown source · the receipt-link route]

Category Mapping

The Capture Ritual

[The 15-second flow, phone-first · subscriptions as auto-rows · the odd-one note rule]

Month-End Close (15 min)

[Statement reconcile → chase gaps → subtotals in downstream format → export filed]

Reimbursement rules and deduction categories are the downstream's law — policy documents and local tax professionals define them; this sheet transcribes, never decides. Not tax advice.

Quality Checks

• A row passes the 15-second phone test
• Categories are verbatim from the downstream consumer
• Every row links its receipt; thresholds noted where rules allow less
• The close reconciles against the statement monthly
• Odd expenses carry their explanation from day one

Anti-Patterns

• Do not design for the reconstruction — the sheet serves the at-spend habit or it serves the shoebox
• Do not invent categories — the downstream's list, spelled identically, is the whole trick
• Do not require heavy rows — every mandatory field beyond five costs compliance
• Do not skip the monthly reconcile — capture without audit drifts, quietly
• Do not decide deductibility in the sheet — categories transcribe; the professional decides