Imagine you're auditing Rajesh & Co. Pvt. Ltd. and you find ₹45,000 of expenses booked in the wrong head, a ₹2 lakh revenue figure that looks slightly aggressive, and a ₹90,000 depreciation error. Do these matter? Do you ask management to fix them? Do you modify your opinion? That's exactly what SA 450 tells you to do — it's your rulebook for what to do once you've found errors.
Misstatements come in three flavours. A factual misstatement has no room for debate — the invoice says ₹1,00,000 but the books say ₹1,10,000 (clearly wrong). A judgmental misstatement arises from accounting estimates or policy choices where management's judgement differs from yours (e.g., provision for doubtful debts). A projected misstatement comes from sampling — if you test 50 invoices and find errors in 5, you project that error rate across the full population. You must accumulate all three types throughout the audit in a schedule sometimes called the Summary of Unadjusted Differences (SUD).
Not every tiny error needs to go on that schedule. SA 450 allows you to set a 'clearly trivial' threshold — amounts so small that accumulating them would serve no purpose. This is not the same as materiality; clearly trivial is typically around 5–10% of overall materiality. Think of it as the filter at the bottom of your coffee cup — only the fine stuff passes through and gets ignored.
Once you've built your SUD, you communicate all uncorrected misstatements to management (and, if appropriate, those charged with governance) and ask them to correct the financial statements. If management corrects everything — great, clean opinion. If they refuse or partially correct, you must evaluate whether the remaining uncorrected misstatements are material, individually or in aggregate (watch out for offsetting misstatements — you cannot net a ₹5 lakh overstatement against a ₹5 lakh understatement just because they cancel out). If they are material, you modify your audit report. You also obtain written representations from management that they believe uncorrected misstatements are immaterial — this is a hard requirement under SA 450, not optional.