What your accountant needs from you every month

Most friction between a small business and its accountant comes from the handover being treated as a conversation rather than a delivery of specific items. The owner sends what they have when asked, the accountant asks for what is missing, and the exchange runs across several days that were needed for the work itself.

The fix is to treat it as a fixed list. What an accountant needs monthly is, in substance, six things: complete bank statements for every account, sales invoices for the period, purchase invoices with the supplier tax details visible, expense receipts, salary and statutory deduction records, and the data needed to reconcile GST, meaning your purchase register against what the portal shows.

What makes it a list rather than a pile is completeness and coverage of the whole period. A bank statement for a month with three days missing is not a bank statement for that month, because the reconciliation cannot close and the accountant has to ask. The same applies to accounts nobody thinks of as business accounts, such as a payment gateway settlement account or a wallet used for small purchases. Money that moved through them is business activity, and money nobody sent statements for is money that will be reconstructed from guesses or left out entirely.

Knowing why each document is wanted makes it obvious which substitutes are acceptable and which are not.

Bank statements are the independent record. They are the only document in the set that your business did not create, which is exactly what gives them their weight: everything else can be checked against them. Sales invoices establish what was supplied, at what value, with how much tax, and they are what your reported outward supplies are built from. Purchase invoices do the same in the other direction and carry a second job, since they are what supports input tax credit, which is why a payment confirmation cannot replace one. Expense receipts support deductibility, and the required document differs by category.

Salary records establish what was paid to whom along with the statutory deductions, which have their own deposit deadlines separate from anything else in this list. GST reconciliation data is the comparison between what you recorded as purchases and what your suppliers actually reported, and it is the one item that depends on somebody else's behaviour rather than only on yours.

The practical implication is that a substitute is acceptable when it carries the same facts. A bank statement download is as good as a stamped one. A photograph of an invoice is usually fine if every field is legible. A note in a diary saying paid Ramesh 12,000 is not a substitute for anything, because it establishes only that somebody wrote it down.

The reason accountants push on dates is not preference. Monthly and quarterly filing deadlines are fixed, and the work between receiving records and filing is not compressible past a point.

When records arrive with a week left, several things that would have been sequential have to happen at once, and the first casualty is always the checking rather than the filing. Reconciliation gets shortened. A mismatch that would have prompted a query gets resolved by assumption because there is no time to ask. Anything ambiguous gets classified the way it was last month rather than the way it should be this month.

The second casualty is your ability to respond. If your accountant finds on the twentieth that a supplier has not reported an invoice, there may be time to contact that supplier and have it corrected in their next filing. Finding the same thing on the last day means the credit is simply not claimed for that period, and the money is deferred at best.

The third cost is fee-related and rarely discussed openly. Work done under time pressure at the end of the month costs the accountant more to deliver, and it is one of the reasons a practice quotes differently for a client who delivers on a schedule than for one who does not. Consistently late records also change the professional relationship, since an accountant who has repeatedly filed on incomplete information becomes cautious in a way that shows up as more conservative positions.

Filings do not wait for you to be ready. When the deadline arrives and something is missing, the accountant has three options and all of them cost something.

They can file on estimates, using last month's figures or a proportion, and correct it later. Corrections are possible in the GST system through subsequent returns, and income-tax returns can be revised, but both have time limits and consequences, and interest on a shortfall runs from the original date rather than from the correction. Amending is also more expensive than doing it once.

They can file excluding what is undocumented. An input tax credit not claimed because the invoice was missing is money paid to the government that you were entitled to recover, and the window for claiming credit for a financial year closes, so it does not sit available indefinitely. An expense excluded because there was no receipt raises taxable profit and therefore tax.

They can file late, which brings its own late fees and interest.

There is a fourth cost harder to see. Estimated figures make later reconciliation harder, because the books now contain entries that do not correspond to documents. Next month starts from a position that is already approximate, and the approximation compounds. A year built this way ends with books that cannot be tied to evidence, which is the state that turns an ordinary notice into a serious problem.

The businesses that find this easy are not more disciplined by temperament. They have arranged things so that the monthly handover requires almost no work, because the work happened continuously.

The principle is to capture at the point of transaction. A receipt photographed when it is received is captured; a receipt in a pocket is a future search. The same applies to a purchase invoice, which should be filed when it arrives rather than when it is needed, and to the buyer's GSTIN, which should be collected at onboarding rather than at filing.

Second, fix a date and treat it as real. A monthly close on a stated day, where the period is finished and nothing further is added to it, is what allows the accountant to work on a stable set of records. Sending a batch and then sending three more transactions over the following week means every check has to be repeated.

Third, tell your accountant what is unusual before they find it. A one-off large payment, a customer dispute, a new line of business, an asset bought: each of these changes the treatment of something, and a sentence about it in advance is far cheaper than the query it prevents. Fourth, send a short summary of what you believe the period contains, such as total sales and the closing bank balance. When the accountant's figures disagree with yours, that disagreement is found immediately rather than at year end.

An accountant works from the records they are given, and there are things no amount of professional skill recovers from an incomplete set.

They cannot know about a transaction you did not tell them about. A sale settled in cash and never recorded does not appear, and the accounts they prepare will be wrong in a way that is your exposure and not theirs. They cannot determine the purpose of a payment from a bank narration. A transfer to a name with no invoice attached is unclassifiable, and what happens next is either a query or an assumption, and the assumption is the dangerous outcome because it is invisible.

They cannot value your stock. Closing stock directly determines reported profit, and it comes from a count somebody in the business performs. An accountant can tell you the figure looks improbable relative to sales; they cannot count your warehouse. Nor can they tell you which receivables have gone bad, which is a judgement about your customers.

This is the boundary that also applies to any bookkeeping software, whatever it claims. A system can capture, categorise consistently, reconcile against a statement, and flag with real precision that a document is absent or that a total does not match. What it cannot do is supply the missing document, know what an unlabelled transfer was for, or count physical stock. Those inputs come from the business, and every downstream figure depends on them being provided honestly and completely.