Once the books are rightly rejected, how much guesswork is the Assessing Officer allowed in a best judgment assessment?
The assessee's books were rejected for defects including the absence of a stock register and the income was estimated. The Supreme Court upheld the rejection and confirmed that some guesswork is inevitable in a best judgment assessment, but the estimate must be honest and must bear a reasonable nexus to the available material and the circumstances of the case.
Decided by the Supreme Court (Supreme Court of India — S.B. Sinha and Markandey Katju, JJ. (judgment delivered by Katju, J.)) on 2006-12-14, reported as (2007) 288 ITR 10 (SC); [2007] 158 Taxman 71 (SC); Civil Appeal No. 5809 of 2006 (arising out of SLP (C) No. 1779 of 2005). It bears on section 144, section 145(3) of the Income Tax Act 1961, in Assessment & Scrutiny matters.
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The assessee, a gems dealer, maintained accounts that did not permit verification of the trading results; in particular no quantitative stock record was kept and there were other defects in the books. The Assessing Officer rejected the book results and made a best judgment estimate of income, which was substantially sustained in appeal. The assessee complained that the estimate was arbitrary and that a lower figure ought to have been adopted. The matter reached the Supreme Court on the legality of the estimate.
Where the accounts are unreliable the officer is entitled to reject them and to estimate. In a best judgment assessment there is necessarily some degree of guesswork, but the officer must make an honest estimate and the figure adopted must have a reasonable nexus to the available material and the circumstances of the case. An assessee whose own default made a precise computation impossible cannot complain merely because the estimate is higher than it would like.
Section 144 is a machinery for arriving at a figure when the assessee's own records will not yield one, so exactness is not the standard; reasonableness is. The obligation on the officer is therefore twofold: he must first have a lawful basis for discarding the books, and he must then anchor the estimate in material rather than in impulse. The Court declined to reduce the estimate because the defects were the assessee's doing and no material was produced to show the rate adopted was without foundation. That balance is what keeps s.144 from being either a rubber stamp for the return or a licence to assess at will.
It is well settled that in a best judgment assessment there is always a certain degree of guess work. No doubt the authorities concerned should try to make an honest and fair estimate of the income even in a best judgment assessment, and should not act totally arbitrarily, but there is necessarily some amount of guess work involved in a best judgment assessment, and it is the assessee himself who is to blame as he did not submit proper accounts.
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Handle my notice → Ask a CA on WhatsAppThe assessee's books were rejected for defects including the absence of a stock register and the income was estimated. The Supreme Court upheld the rejection and confirmed that some guesswork is inevitable in a best judgment assessment, but the estimate must be honest and must bear a reasonable nexus to the available material and the circumstances of the case. This was decided by the Supreme Court (Supreme Court of India — S.B. Sinha and Markandey Katju, JJ. (judgment delivered by Katju, J.)) and bears on section 144, section 145(3) of the Income Tax Act 1961. It is reported as (2007) 288 ITR 10 (SC); [2007] 158 Taxman 71 (SC); Civil Appeal No. 5809 of 2006 (arising out of SLP (C) No. 1779 of 2005). If it applies to you, the first step is this: Attack the rejection of books first: if s.145(3) is not validly invoked, the estimate has no foundation.
The assessee, a gems dealer, maintained accounts that did not permit verification of the trading results; in particular no quantitative stock record was kept and there were other defects in the books. The Assessing Officer rejected the book results and made a best judgment estimate of income, which was substantially sustained in appeal. The assessee complained that the estimate was arbitrary and that a lower figure ought to have been adopted. The matter reached the Supreme Court on the legality of the estimate. The matter was decided on 2006-12-14 by the Supreme Court (Supreme Court of India — S.B. Sinha and Markandey Katju, JJ. (judgment delivered by Katju, J.)). On those facts the Supreme Court held as follows. Where the accounts are unreliable the officer is entitled to reject them and to estimate. In a best judgment assessment there is necessarily some degree of guesswork, but the officer must make an honest estimate and the figure adopted must have a reasonable nexus to the available material and the circumstances of the case. An assessee whose own default made a precise computation impossible cannot complain merely because the estimate is higher than it would like.
Section 144 is a machinery for arriving at a figure when the assessee's own records will not yield one, so exactness is not the standard; reasonableness is. The obligation on the officer is therefore twofold: he must first have a lawful basis for discarding the books, and he must then anchor the estimate in material rather than in impulse. The Court declined to reduce the estimate because the defects were the assessee's doing and no material was produced to show the rate adopted was without foundation. That balance is what keeps s.144 from being either a rubber stamp for the return or a licence to assess at will. In the words reproduced by the source cited on this page: "It is well settled that in a best judgment assessment there is always a certain degree of guess work. No doubt the authorities concerned should try to make an honest and fair estimate of the income even in a best judgment assessment, and should not act totally arbitrarily, but there is necessarily some amount of guess work involved in a best judgment assessment, and it is the assessee himself who is to blame as he did not submit proper accounts."
It was decided by the Supreme Court on 2006-12-14 and is reported as (2007) 288 ITR 10 (SC); [2007] 158 Taxman 71 (SC); Civil Appeal No. 5809 of 2006 (arising out of SLP (C) No. 1779 of 2005). Binding on every court and authority in India. A Supreme Court decision binds every assessing officer, every Commissioner (Appeals), every bench of the Income Tax Appellate Tribunal and every High Court in India. An officer who declines to follow it is acting contrary to law, and that refusal is itself a ground of appeal. On section 144, section 145(3), the practical question is whether the facts of your own notice match the facts of this case closely enough for the same rule to apply.
It cuts both ways and is cited by both sides. Where the accounts are unreliable the officer is entitled to reject them and to estimate. In a best judgment assessment there is necessarily some degree of guesswork, but the officer must make an honest estimate and the figure adopted must have a reasonable nexus to the available material and the circumstances of the case. An assessee whose own default made a precise computation impossible cannot complain merely because the estimate is higher than it would like. It arises in Assessment & Scrutiny matters, on section 144, section 145(3) of the Income Tax Act 1961, and was decided by Supreme Court of India — S.B. Sinha and Markandey Katju, JJ. (judgment delivered by Katju, J.). Before relying on it, read the source linked on this page and check whether it has since been distinguished, overruled or overtaken by an amendment to the Income Tax Act. In practice the steps that follow from it are these. Ask the officer to state, in the order, the material and comparables from which the estimated rate is drawn. Put your own past history, audited results and industry data on record before the estimate is made, not after. Argue nexus, not sympathy: show the adopted figure is disconnected from any material rather than merely high. Where the defect is curable (for example a missing stock register), reconstruct and file quantitative details during the assessment.
Still good law. Separate check: still cited as the leading contemporary Supreme Court authority on estimation after rejection of books in current commentaries on s.144 under both the 1961 Act and the 2025 Act; no overruling or amendment displacing it was found. That finding was checked against a published source, which is linked on this page, on 2026-08-19. Checking whether an authority still stands matters as much as knowing what it held: a decision may be overruled on one point and survive on another, or the provision it interprets may have been amended since. Read the source and the editor's note on this page before relying on it in a reply to an Assessing Officer or in an appeal.
Where the accounts are unreliable the officer is entitled to reject them and to estimate. In a best judgment assessment there is necessarily some degree of guesswork, but the officer must make an honest estimate and the figure adopted must have a reasonable nexus to the available material and the circumstances of the case. An assessee whose own default made a precise computation impossible cannot complain merely because the estimate is higher than it would like.
TaxSphere, “Kachwala Gems v JCIT”, https://taxnotice.vittsphere.com/caselaw/case/kachwala-gems-v-jcit-honest-estimate/ (validity last checked 2026-08-19)
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The officer rejected my books without giving reasons and added half my interest receipts as concealed income for five years. Can he do that?
The officer rejected my books and then simply picked a figure, and the appellate authority enhanced it without saying why. Can an estimate be made like that?
The officer rejected my books and made a best-judgment assessment because I kept no stock register. Is that enough on its own to reject?
The Assessing Officer has disallowed forty per cent of my client's purchases on an estimate, but has not rejected the books. Is that open to him?
