Compare the bank account transactions in the main ledger with those in the online banking for the same period.
Accounting -> Main ledger: select the account (example 1020 Bank account) and the period you want to check.

If a company has multiple bank accounts, check the balances of all accounts.
If the balance in the bank does not match the balance in the program, find the last date when the balances matched and then check transactions line by line to identify the difference.

Compare the data month by month at the beginning:

• If the balance at the beginning of the month is correct in the program but not at the end, then something went wrong during that month.
• Find the date when the end-of-day balance last matched, then start checking from that date day by day (or week by week, if needed). Comparing shorter periods is much easier.

If a company has an overdraft that is recorded continuously on the regular bank account, the account balance may be negative. At the end of the financial year, the amount of the used overdraft must be recorded under short-term liabilities. A suitable account is in the range 2110–2119.

You can use account 2110 Short-term loans and notes or add a new account.

Example transaction:
Debit: 102x Bank account
Credit: 2110 Short-term loans and notes (or your added account)
At the beginning of the year, enter the reverse transaction.

If the company uses cash, also check the balance of the 1010 Cash registry account. The cash balance must never be negative. If the reporting person has paid company expenses from personal funds, this must be recorded as a debt to the reporting person (account 2680 Debt to the reporting person). If possible, use expense reports when settling amounts with the reporting person.