Reconcile adjusted basis and net proceeds, then apply explicitly entered tax-rate scenarios without selecting brackets or special treatment.
A quick decision brief for this specific tool
Documented adjusted basis, gross proceeds, applicable selling costs, a separately determined capital-loss offset, and user-entered federal, state/local, and NIIT scenario rates
Net proceeds, gain/loss, offset used, modeled taxable gain, combined entered rate, modeled tax, and after-tax proceeds
Basis/proceeds arithmetic followed by multiplication at explicitly entered scenario rates; the tool does not select holding period, brackets, eligibility, or netting treatment
Choose your path
Reconcile adjusted basis and net proceeds, then apply explicitly entered scenario rates without deciding capital-gain eligibility, brackets, special treatment, or filing outcomes.
Compare proceeds with a documented adjusted basis and transaction costs.
Enter basis, gross proceeds, applicable selling costs, and any separately determined loss offset.
Can reproduce gain/loss arithmetic and identify missing basis records before modeling rates.
Test an advisor- or software-supplied combined rate assumption.
Enter federal, state/local, and NIIT rates separately and compare one sourced scenario at a time.
Does not mistake the rate inputs for tax brackets selected by the tool.
Recognize when simple arithmetic is insufficient.
Review Schedule D, basis, and special-rule boundaries before using any tax output.
Escalates wash sales, recapture, collectibles, home/stock exclusions, installment sales, crypto lots, or carryovers to current analysis.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Subtract entered selling costs from gross proceeds, then subtract documented adjusted basis to obtain the arithmetic gain or loss.
Gain or Loss = Gross Proceeds − Selling Costs − Adjusted BasisApply the entered loss offset only up to the positive gain, then multiply the remainder by the combined user-supplied scenario rates.
Modeled Tax = max(0, Gain − Loss Offset Used) × Combined Entered RateThe calculator does not determine holding period, rate-band stacking, netting order, carryovers, NIIT eligibility, recapture, exclusions, reporting adjustments, or state rules.
Records + current Schedule D analysis → applicable treatmentUpdated: August 2026
Use transaction records and documented basis before testing any tax rate.
→ Gain before any entered loss offset: $7,250
Enter only an offset already supported by current records or tax analysis.
→ The offset used cannot exceed the positive gain
When net proceeds are below adjusted basis, the tool reports the arithmetic loss and zero modeled tax.
→ Loss remains visible; deductibility and carryover are not inferred
Start with documented adjusted basis, gross proceeds, and applicable selling costs. Any loss offset and federal, state/local, or NIIT rate is a user-supplied scenario—not a bracket or eligibility decision made by this page.