Why your startup needs a monthly accounting close

A monthly accounting close is the process of checking and completing a month’s financial records before using them to report performance. It helps answer a simple question: are these figures ready to make decisions from, or are important items still missing?

For a funded startup, an unrecorded contractor bill or a duplicated payroll entry can change the apparent cost of the team. A bank balance alone cannot tell you what the month cost or what you still owe. Closing the records gives your reporting a dependable starting point.

What happens during the close?

The accountant checks transactions, compares recorded balances with supporting records and makes necessary adjustments. This includes costs incurred but not yet invoiced, known as accruals, and payments that cover future periods, known as prepayments. Xero’s month-end guidance describes these core steps.

For example, suppose a contractor completed £6,000 of work in March but sends the invoice in April. If March’s accounts omit that work, March may look cheaper than it was. The accountant checks the facts and records the appropriate cost. Payment belongs in the cash forecast when it is expected to leave the bank.

Similarly, paying £12,000 upfront for a straightforward twelve-month service does not necessarily mean the whole amount is one month’s expense. The accounting treatment depends on what was bought and the period it covers. Explain the contract rather than guessing the entry.

What to send your accountant each month

Agree one checklist and secure place for records. These are suggested responsibilities to adapt to your team, not a fixed onboarding requirement:

• Founder or operations lead: new customer contracts, changes to existing deals, cancellations and information about work delivered but not yet invoiced.

• People lead or founder: starters, leavers, pay changes, bonuses, leave adjustments and approved payroll changes through the agreed payroll process.

• Team members and spending owners: supplier invoices, receipts and expense claims, with the business purpose and any project allocation explained.

• Budget owners: work received without an invoice, outstanding purchase commitments, annual renewals and anything paid ahead of use.

• Founder: funding documents, loans, grants, share transactions, unusual payments and company costs paid personally.

• Accountant or agreed administrator: complete bank, card and payment-platform records, plus any missing source documents flagged by reconciliation.

Software may collect transactions automatically, but it cannot always explain a payment, a changed contract or work that has not been billed. Tell the accountant what changed. GOV.UK’s records guidance covers the financial records a company must keep, including supporting invoices, contracts and bank statements.

Agree who prepares, checks and resolves questions

Give the close a named owner. The accountant prepares the records and flags questions; the founder and team supply explanations and confirm business facts. Agree who reviews the finished figures and when unresolved items need a decision.

Keep a short issues list: item, amount if known, person responsible, next action and status. For example: ‘March contractor work — confirm days delivered — operations lead.’ That is more useful than repeatedly circulating a report labelled ‘nearly final’.

When are the figures ready to report?

Use a practical release check before circulating management accounts:

• Bank and other key balances have been checked against supporting records, with differences understood.

• Sales, supplier costs and payroll have been recorded for the appropriate period.

• Significant estimates, unusual transactions and missing information have been reviewed.

• The reviewer understands material changes from the previous month and budget.

• The report has a clear version date; unresolved limitations are visible to its readers.

Agree a timetable suited to the business and the information available. A monthly close is an internal process, not a universal filing deadline. If a significant correction arrives later, record it and explain any changed report rather than silently replacing the figures.

Turn checked records into useful reporting

Our Accounting package provides the foundation. Reporting & planning turns the records into management accounts, budget comparisons and cash forecasts. We manage the underlying accounting for ongoing support, so the reports and records work together.

Once the records are ready, the next step is explaining budget versus actual results. If you are unsure where your process needs attention, a free Founder finance review helps you identify the gaps and decide what to tackle first.