How to cash up a till: the step-by-step process
Cashing up — or balancing the register — is the process of reconciling the physical cash in a till against the Electronic Point of Sale (EPOS) records at the end of a shift. When done correctly, it takes less than ten minutes and produces an auditable record for management. The process is identical in its logic whether you are a retail worker in Manchester or a cashier in Minneapolis; only the terminology differs.
- Print your Z report. Before touching the till, print the Z report from your EPOS system. This gives you the system's expected cash total for the session — your benchmark figure. Do not count the cash first; the Z report should be generated independently.
- Remove the till drawer. Take the drawer to a secure location — a back office, manager's station, or cash room. Never count cash in view of the public or unsupervised staff.
- Separate and stack by denomination. Sort all notes into denomination groups (£50, £20, £10, £5 in the UK; $100, $50, $20, $10, $5, $1 in the US). Repeat for coins. Check for any foreign currency or damaged notes that should be set aside.
- Count and enter quantities. Count the number of each denomination — not the value — and enter those quantities into the Money Counter Calculator above. The tool multiplies each quantity by its denomination value and produces the grand total automatically.
- Subtract your float. The float (opening cash) was in the drawer before trading started. Deduct it from the total counted — the calculator does this automatically when you enter your float amount.
- Add safe drops and other items. If cash was removed to the safe mid-shift (a "cash drop" or "safe drop"), add that amount back into the calculation. Include cheques or vouchers counted in the till.
- Compare to the Z report. Enter the Z report total into the calculator. Any difference is your variance — shown as over or under. Investigate variances above £5 (UK) or $5 (US).
- Record and sign off. Print or save the count sheet. Both the cashier and manager should sign to confirm the count, creating an audit trail for HMRC or IRS purposes.
King Charles III banknotes (£5, £10, £20, £50) entered circulation on 5 June 2024 and co-circulate with Queen Elizabeth II polymer notes. Both versions are legal tender and count at the same face value. If your machine counts notes by weight, ensure your supplier has applied the software update for the new portrait — the physical dimensions and polymer base are identical.
The mathematics behind the counter
The total value of a cash drawer is calculated by the following formula, consistent with standard retail accounting:
Vtotal = Σ(Di × Qi) + Σ(Cj × Qj) + Vouchers + Cheques − Float
Where Di is the value of a note denomination, Qi is the quantity of that note, Cj is the value of a coin denomination, and Qj is the quantity of that coin. The Float is the opening cash balance that was in the drawer before trading commenced.
The variance — the difference between your physical count and the Z report figure — is expressed as a signed value: positive means you have more cash than expected (overage); negative means you have less (shortage). Both are anomalies worth investigating.
UK retail cash procedures: X reads, Z reads and floats explained
The X and Z reporting framework originated with standalone mechanical tills and remains the industry standard for EPOS systems across UK retail. Understanding the difference is essential for accurate cash management.
| Report Type | What It Does | Frequency | HMRC Use |
|---|---|---|---|
| Float | Opening cash placed in drawer to provide change | Start of shift | Not a document — establishes base liquidity |
| X Read | Mid-shift snapshot of current sales — does not reset counters | On demand | Operational oversight only; not a legal record |
| Z Read | End-of-day close — totals all transactions and resets counters to zero | Once per trading day | Legal accounting document; required for VAT & income tax |
| Audit Roll | Continuous log of every transaction | Continuous | Full transaction history for dispute resolution |
A float is typically a fixed amount agreed by the business — often £100 to £200 in a mixed combination of coins and low-denomination notes. The float is counted at the start of the shift to confirm it is correct, then set aside at the end to be used in the next opening. It is not part of the day's takings.
Retail workers in the UK commonly search for "till cashing up calculator", "retail register cashing up tool" and "how to reconcile a till at end of shift" — all tasks this calculator is designed to address directly.
US register balancing: opening balance, cash drops and the daily close
In US retail, the same process is known as balancing the register. The opening balance (equivalent to the UK float) is confirmed at the start of each shift. Mid-shift, cashiers may perform "cash drops" — removing large-denomination bills and placing them in a secured safe to reduce the risk of robbery. These drops must be recorded and added back into the reconciliation at close.
The end-of-shift process uses a Cash Drawer Count Sheet, which records the quantity of each bill and coin denomination, any cheques or vouchers, and the opening balance. The sheet is signed by both the cashier and the shift supervisor. The total is then compared to the POS "Daily Summary of Cash Receipts." The US equivalent of a UK Z report is the daily close or reconciliation report generated by the POS system.
What causes a till variance?
A variance (or discrepancy) between your physical count and the Z report figure is common and, in small amounts, normal. The most frequent causes are:
- Coins stuck together and counted as one
- A note folded in half and counted as two
- Notes placed in the wrong denomination slot in the drawer
- A cash drop not recorded on the Z report or entered incorrectly
- A customer declining their change (creating a small overage)
- A processing error on a refund or void transaction
- Foreign currency or damaged notes included in the count
In UK retail, a variance over £5 or a pattern of recurring shortages is typically the threshold for a formal investigation. In US practice, variances over $5 trigger the same review. A consistent shortage in the same direction (always short, never over) may indicate systematic error or, in serious cases, employee theft — which would require escalation to management and a full audit.
HMRC record-keeping for cash businesses
If you operate a cash-handling business in the UK, HMRC's record-keeping requirements are non-negotiable. Z reports, till rolls, and count sheets are all "primary records" — the original evidence from which your accounts are prepared. The retention periods depend on your legal structure:
| Business Type | Retention Period | Penalty for Non-Compliance |
|---|---|---|
| Sole Trader / Partnership | 5 years from filing deadline | £100 to several thousand pounds |
| Limited Company | 6 years from financial year end | Audit failures and legal non-compliance |
| VAT Records | 6 years | Fines and investigative scrutiny |
| PAYE / Payroll | 3 years | Penalties for inaccurate employment records |
From 6 April 2026, Making Tax Digital for Income Tax Self-Assessment (MTD for ITSA) becomes mandatory for sole traders and landlords with turnover above £50,000. This requires quarterly digital updates to HMRC. Cash count sheets generated by this calculator can be printed and stored as part of your primary record, or the data can be exported into MTD-compatible accounting software such as Xero or Sage. The threshold falls to £30,000 from April 2027 and £20,000 from April 2028.
HMRC may request to see till rolls, Z reports, and count sheets as part of a compliance check. Keeping digital records — scanned PDFs or exports from your EPOS system — is acceptable as long as the records are legible, complete, and backed up. A missing Z report for even one day can result in HMRC reconstructing your income for the entire year based on estimation, which is rarely beneficial for the business owner.