Surviving a sales tax audit: what auditors actually look for

A sales tax audit is a test of evidence, not of intent. The businesses that come out of one badly are rarely the ones that did something wrong; they are the ones that cannot produce, on demand, the records supporting what they already filed.

Audits also follow a pattern. The officer is working through a familiar set of tests in a familiar order, and most of what will be asked can be anticipated long before the first letter lands.

How files get selected

Selection is seldom arbitrary. Most cases are picked because something in the data does not sit right, and much of that data does not come from you at all.

Your returns are matched against the returns of the people you buy from and sell to, and read alongside customs records, withholding statements, banking information and the profile of comparable businesses in your sector. A figure that is defensible on its own can still look odd next to everything else on file.

• Input tax claimed against suppliers who never declared the matching supply
• Value addition or input-to-output ratios out of line with the sector
• A refund claim, particularly a first one or an unusually large one
• Declared sales that do not agree with customs or withholding data
• Long runs of nil or minimal payment while the business is visibly active

Reading the first request letter properly

The opening notice defines the whole exercise, and it deserves a slow reading with three questions in mind: which tax periods are covered, which authority has issued it, and what precisely is being asked for.

Scope matters because everything handed over becomes part of the record. If the notice covers particular months, supply records for those months. Volunteering a wider set is not co-operation, it is an invitation to widen the audit.

If the time allowed is genuinely too short, ask for an extension in writing before the date passes, with a reason. A request made late, or made only by telephone, tends not to exist when it matters.

Two authorities, one set of books

Sales tax on goods is federal and administered by the FBR. Sales tax on services in Sindh is provincial and administered by the Sindh Revenue Board, and the other provinces run their own authorities for services supplied within their borders.

A business supplying both goods and services can therefore face more than one audit covering the same year and the same ledgers, each asking different questions. Businesses operating in several provinces meet the same problem sideways.

The practical risk is inconsistency. If a revenue stream is described as a service in one filing and folded into a goods supply in another, someone will eventually place the two files side by side. Decide the characterisation once, record the reasoning, and apply it everywhere.

Input tax is where most audits are decided

Input tax is usually the largest number under challenge, and the reason is structural. Your entitlement to credit depends on the corresponding supply having been declared by your supplier. Your own invoice, payment and ledger entries do not settle the matter.

So a claim can be disallowed even where the purchase plainly happened, the goods arrived and the money left your account, because the supplier filed late, filed something different, or has since been suspended. The exposure lands on you, not on them.

• Does each claimed invoice appear against you in the supplier's declared data
• Was the supplier active and registered for that period, not merely today
• Do payments trace to bank statements in the manner currently required
• Do purchases tie to goods received: challans, gate entries, stock records
• Are inputs relating to exempt supplies or non-business use properly excluded

Three sets of numbers that rarely agree

Every audit of substance reconciles the sales ledger to the filed returns to the audited financial statements. The three almost never match on a first pass, and that is normal. What matters is that you can explain the gaps before the officer has to ask.

Most differences are ordinary once identified, and each has a document behind it. The trouble starts when nobody has done the exercise and the explanation is invented under pressure.

• Cut-off: revenue recognised in accounts in a different period from the supply
• Exempt, zero-rated and out-of-scope revenue sitting inside one top line
• Services revenue reported to a provincial authority but merged in the accounts
• Credit notes and returns booked in accounts but never adjusted in the returns
• Scrap sales, samples, free issues, inter-branch and related-party transfers

Credit notes and discounts in the wrong period

Adjustments are a common source of disallowance, usually for procedural rather than commercial reasons. A credit note for a genuine return or discount can still be rejected if it was issued outside the permitted window, or if the matching adjustment never appeared in the other party's return.

Year-end discounts are the awkward case: settled in one lump but relating to supplies made across twelve months. Where the terms were agreed in advance and reflected on the invoices, the position is far easier to defend than a single credit note produced after the fact. Check the current time limits and conditions attaching to debit and credit notes before relying on them.

Records must exist at the time, not be assembled afterwards

There is a large difference between records kept as the business runs and records prepared in the fortnight after a notice arrives. Auditors see both regularly and can tell them apart.

Contemporaneous evidence is a chain: purchase order, supplier invoice, transport or delivery documentation, goods received note, stock movement, payment from a bank account, and the ledger entry. Where the chain is complete, most questions are answered before they are put. Where a link is missing, an entirely ordinary transaction starts to look weak.

Reconstruction is visible too: sequential documents printed in one sitting, invoice numbers that do not run in date order, delivery notes with no matching transport record, signatures added long after the event. These draw attention the underlying transaction never deserved.

Answer exactly what was asked, and know when to escalate

Answer the question in front of you, completely, and then stop. Long explanatory letters that wander into other periods, other transactions or hypothetical positions do not demonstrate good faith; they open new lines of enquiry.

Submit under a covering letter with a numbered index cross-referenced to page-numbered annexures, and keep an acknowledged copy of everything filed. If something genuinely cannot be produced, say so plainly and explain why, rather than sending an approximation that will later be treated as a statement of fact.

Bring in representation when the audit shifts from producing documents to arguing a position: a substantial disallowance is proposed, a show-cause is issued, or the answer turns on how a transaction is characterised in law. A short conversation with an adviser at that stage costs far less than the appeal that follows a badly framed reply.

Almost everything above is bookkeeping discipline viewed from the other side of the desk. Businesses that come through an audit cleanly are usually not the ones that prepared hardest for it. They are the ones whose records were already in order, and who simply had to hand them over.