Details vs. spreadsheets — an honest comparison
Spreadsheets scale further than most people admit. If you're running a handful of clients and a simple invoice or two a month, a good sheet is genuinely fine, and switching tools would be theatre.
This page is about where that stops being true. Four places a spreadsheet quietly costs you money once your service business gets past a certain shape — and how Details is designed differently.
No competitor names. No made-up statistics. Just the friction we hear about most often.
Scheduling recurring work
A monthly VAT return, a weekly bookkeeping check, a quarterly board pack — the work itself is fine on paper. The problem is that nobody remembers it exists until a client asks.
- Recurrence lives in your head, or in a column called 'next due' that only updates when you remember
- Rolling a month forward means re-typing dates across every row
- No one gets a nudge when something is due — the sheet doesn't reach out
- Recurring schedules per client, generated on a horizon so upcoming work is visible weeks ahead
- Statutory packs seeded on signup for common jurisdictions — edit or replace
- Due-this-week and overdue views on the dashboard so nothing quietly slips
Capturing billable time
Hours you log on Friday from memory are always low. Hours you log while you work are the real ones. Spreadsheets can hold a time log, but they don't help you keep one.
- Times entered from memory tend to round down by 20–40%
- No live timer — you either interrupt to jot it down or reconstruct the day later
- Rates live in a cell, so changing your rate silently rewrites your history
- Live timer per task with a single active timer at a time
- Manual entries stay first-class — bulk-log yesterday if you prefer
- Every entry snapshots the effective rate at that moment, so historical margin stays accurate after a rate change
Invoicing correctness
An invoice isn't just a total. Tax authorities care about how it was numbered, what the tax point was, whether VAT is broken out correctly, and how corrections were made.
- Invoice numbers are typed in by hand — duplicates and gaps happen, and both are problems in a records check
- VAT is a formula you copy-paste and hope holds
- Corrections mean deleting the old invoice and typing a new one — the audit trail evaporates
- The 'invoice PDF' is a print of a sheet that's still editable next week
- Sequential, gap-free invoice numbering per firm, assigned at issue — not typeable
- VAT rate per line, VAT registration number on the document, tax point captured
- Corrections issued as credit notes that reverse the original — original stays on the record
- Immutable line items on issued invoices, so what the client received matches what your books say
Audit trail
The moment there's a dispute — with a client, with a tax office, with a co-founder — you need to know who did what, when. A spreadsheet remembers the last save.
- No history of who changed what — the last person to touch the cell wins
- Deleting a row deletes the evidence with it
- Shared editing means two people can quietly overwrite each other
- Per-row history: created, updated, by whom
- Payments recorded against invoices, not typed over totals
- Role-based access so the intern can log time without renumbering last quarter's invoices
When to switch
If you're re-typing hours into an invoice, if you've ever handed out two invoices with the same number, or if the answer to "who changed this?" is "the last person to save" — you've outgrown the sheet.
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