Inter-head adjustment: set off a loss under one income head against another after intra-head adjustment, subject to statutory exclusions. Inter-head adjustment allows a taxpayer, after completing intra-head adjustments, to set off a loss under one head of income against income under another head in the same year. Restrictions include prohibition on setting off speculative business losses against other heads (with limited reciprocal treatment), prohibition on setting off capital gains losses and losses against lottery/gambling winnings, exclusion of race horse ownership losses, exclusion of losses from certain specified businesses with special tax treatment, and disallowance of setting business or professional losses against salary income.