Closings: days, months, and the chain of Zs

Closing the month in one click, reopening a locked period, printing the detail for your accountant, and understanding the perpetual grand total.

Updated on 11 September 2026 2 min readBy the Buiiild teamIntermediate

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On top of days, you archive the month in one click: it's the document your accountant is waiting for.

Closing the month

The button only shows if the month has sales and hasn't already been closed — a closing is never redone. Close every day of the month first.

The history of your "Zs"

Each line is a locked period. Click it to open the figures in detail, then print it on plain A4: it's the document to hand over in an audit, or to attach to your accounts.

The chain of closings

Closings are numbered with no gap and chained to each other by their fingerprint. A missing number would show up immediately: that's exactly what the law requires your software to guarantee.

Total including tax, total excluding tax, VAT broken down by rate, tips, payment methods, and the perpetual grand total — the running total of everything your till has taken since it opened. This total never goes down: that's what makes a deleted sale impossible to hide.

Frequently asked questions

Can I redo a closing that's already been done?

No, a closing is never redone. That's exactly what makes your figures binding: a locked period stays locked.

The "Close the month" button doesn't appear

It only shows if the month contains sales and hasn't already been closed. Also check that every day of the month has itself been closed: that's a prerequisite.

What is the perpetual grand total?

It's the running total of everything your till has taken since it opened. It never goes down, even after a credit note: that's what makes a deleted sale impossible to hide.

What document should I give my accountant?

A printed monthly closing is enough in most cases. For a specific period, download the full archive from Till compliance.

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Go further

Till and paymentsToday's sales and closing the day

Taken, receipts, credit notes, tips; sold on one side, taken on the other; then the closing that locks the day and chains it to the previous one.

Till and paymentsTill compliance and the certificate

Unalterability, security, retention, archiving: what the till guarantees, the integrity check you can rerun, the archive of a period and the certificate to print.

Till and paymentsThe sales journal: receipts, drafts, unpaid, credit notes

Finding a receipt by number, name or amount; reprinting a duplicate; following up an unpaid one; issuing a credit note; reading the fingerprint that stands as proof.

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