Acquisition day-one accounting: a cutover plan for finance

On the first operating day after an acquisition, someone must be able to receive customer money, approve payments, run payroll, and answer a billing question. Build the finance cutover around those transactions. A future plan to combine systems does not establish who owns today's bank access, which entity issues an invoice, or where the first post-closing record belongs.

PwC's Day One guidance describes operating models covering people, processes, systems, contracts, and data. BDO discusses temporary shared-service arrangements where a separated business still depends on the seller. The appropriate model depends on the deal. Confirm the legal transaction, service agreements, and actual permissions before assigning work or moving records.

Record the effective closing date and time, affected entities, transferred operations, and any business that remains with the seller. Translate those facts into billing, purchasing, payroll, inventory, and cash instructions. Confirm how transactions around the boundary are handled under the agreement. A date in a presentation is not enough for a team processing orders across time zones.

Prepare a list of boundary transactions: goods received before closing but invoiced later, customer cash received for earlier invoices, prepaid services extending beyond closing, and payroll covering both periods. Assign the records needed to resolve each case. Keep contractual allocation questions separate from the accounting conclusion, and give unresolved items to the relevant legal or accounting adviser.

Use a readiness table with one accountable owner, a backup, required access, and a demonstrated task. Successful login is only part of readiness. The responsible person should be able to complete the authorized activity and retrieve the supporting record. Test with safe sample records before closing where the transaction process permits it.

Take controlled closing snapshots of the trial balance, open invoices, vendor balances, inventory, fixed assets, payroll liabilities, cash, and material schedules. Retain source documents and the access needed for agreed post-closing reviews. Document what the snapshot includes and which later adjustments may still be required. A spreadsheet of opening balances cannot replace every historical transaction record.

Keep a clear posting authority while systems overlap. If the seller continues providing services temporarily, specify which records they may create, how the buyer receives them, and who reconciles the result. Avoid two teams posting the same invoice or paying from different systems. Record the point after which corrections must follow the buyer's approved process.

Review recurring connections individually: bank feeds, payment processors, payroll exports, tax portals, and scheduled report deliveries. Confirm the permitted account owner and administrator after closing. Changing an email address does not establish a right to transfer a service contract or continue using the seller's credentials.

Match the closing funds-flow statement to authorized payment instructions and actual settlement evidence. Separate acquisition consideration, debt repayment, professional fees, working capital settlements, and ordinary operating payments. Have the responsible advisers confirm accounting treatment. A wire description alone is rarely enough to determine the final ledger account.

Track misdirected customer receipts and vendor payments explicitly. A customer may continue using old bank details, or an automatic charge may remain on a seller-managed card. Log the amount, owner, agreed transfer or reimbursement, and completion evidence. Use controlled communication for any payment-instruction changes; do not rely on an unverified email to redirect funds.

Compare the first reporting period with the closing snapshot and list unresolved opening items separately from new activity. Preserve the information needed for the purchase-price allocation and any earnout or working capital calculation. The financial reporting team should know which balances are provisional and who owns the supporting valuation or technical conclusion.

Finish the cutover only when recurring tasks have owners, required records are accessible, and exceptions have a dated resolution plan. Where temporary seller support remains, identify the specific service, charge, exit condition, and replacement capability. The first close should establish a repeatable operating process that the new owner can continue after the deal team steps away.