It is the 15th. The 2B is out. Somebody in the office runs the comparison against the purchase register, and forty minutes later there is a list: 38 lines where the credit in the statement does not agree with the credit in the books.
That list took forty minutes. Clearing it will take three weeks, and about fourteen of the lines will still be open when next month's statement arrives.
Nobody has done anything wrong. The comparison is not the work. The comparison is the part a machine has always been able to do. The work is everything that happens after the list exists, and almost none of it is arithmetic.
The list is not one problem. It is four.
Those 38 lines look identical in the report and are not remotely the same job:
The supplier has not filed yet. A quarterly filer under QRMP invoices you in April and reports it in July. Nothing is wrong, nothing needs chasing, and the line will clear itself. Treating this as an exception wastes the chase.
The invoice is in the statement but keyed differently in the books. One digit wrong in the invoice number, the date entered as the receipt date rather than the invoice date, or the purchase booked against a different GSTIN of the same group. This is a data-entry fix and it is yours to make, not the client's.
The goods or the invoice arrived in a different month than the credit. The statement is right, the register is right, and the two will agree next month. This one needs a note, not an action.
The supplier genuinely has not reported it. This is the only bucket where somebody has to be chased, and it is usually the smallest of the four.
Sorting 38 lines into those four buckets is judgement work. It needs the invoice, it needs to know whether the goods actually came, and often it needs somebody to remember a conversation from two months ago. That is why the sorting, not the comparison, is where the week goes.
The document you need is somewhere, and you know it
To decide whether line 14 is a keying error or a genuinely unreported invoice, you have to look at the invoice. So the second search begins.
Sometimes it is in the accounting file. Often it is a photograph the client sent in May with the message "sir ye bhi le lena", sitting in a chat on somebody's phone. Sometimes the client's own accountant has it and your office never received it at all, which is itself the finding — except you will spend twenty minutes establishing that before you can say it.
This is the same failure described in where did the client send that document?, arriving at the worst possible moment. Reconciliation is exactly the task that punishes a practice for storing documents without their context.
Then the follow-up loop, which nobody is tracking
Say you have sorted the list. Nine lines need chasing. You message the client with nine invoice numbers. The client forwards it to their purchase person. The purchase person calls two suppliers. One supplier says they filed it — they did, in the wrong quarter. Two do not reply.
Three weeks later, next month's statement arrives.
Now answer these, honestly, for your own practice:
- Which of those nine did we actually receive an answer on?
- What exactly did the supplier say about invoice 4471, and who in our office heard it?
- Have we asked this client about this same line before? How many times?
- If the person who sent that message is on leave, can anyone else answer the above?
Most practices cannot answer any of the four from a record. They can answer them from a person, which is a different thing, and only while that person is available and remembers.
So each month starts a fresh list. Lines that were chased in July get chased again in August by someone who does not know they were chased in July, and the client — reasonably — starts to find the practice irritating.
The part with an actual deadline
This matters more than it looks, because a rolling mismatch is not indefinite. Input tax credit for an invoice of a financial year cannot be taken after 30 November following the end of that year, or the date the annual return is furnished, whichever is earlier.
So every unresolved line has an expiry date. A line that quietly rolls from May to June to July to August is not a housekeeping item. It is a credit that will be lost on a specific date, and the client will find out about it from you, afterwards, which is the worst possible way for a client to learn anything.
The reconciliation report does not know this. It only knows this month.
What is actually worth fixing
Three things, in order of how much they change:
Carry the list forward instead of regenerating it. A mismatch is an open item with a history, not a row in this month's report. It should stay open, with its age visible, until it is resolved, cleared by a later filing, or deliberately written off. Age is the number that tells you which line is about to cost real money.
Keep the document and the sentence together. Every open line needs the invoice and needs whatever the client said when they sent it. Half of reconciliation is establishing what somebody already told you. A record that holds the file but not the message answers the wrong half.
Make the chase a practice record, not a person's memory. Whoever picks up the file in October should be able to see what was asked in July, what came back, and what is still outstanding, without asking a colleague. This is the one that decides whether the work survives an article assistant finishing their term.
And one that is worth naming because it is the common mistake: the answer is almost never a better comparison engine. The comparison was never the bottleneck. A practice that buys more matching capability to fix a follow-up problem has bought the wrong thing, and will be running the same three-week chase next month with a nicer report at the top of it.
Kognora gives a professional practice one record per client — messages, documents and meetings together — and answers questions from that record with the source document attached, so an answer about invoice 4471 arrives with the invoice. Nothing is sent to a client without a human pressing send. Kognora does not file returns or compute your reconciliation; it is the record underneath the work, which is the part that usually goes missing. The plain version of what it does and refuses to do is written out here.