The inclusion ratio is the fraction of a distribution from an individual or trust that is subject to generation skipping transfer tax (GSTT). For example, if a lead trust distributes $1,000,000 to a "skip person" and the inclusion ratio is .40, the amount of the distribution that will be subject to GSTT is .40 x $1,000,000 or $400,000.
Life income plan payments: For life income plans that make distributions that are subject to GSTT, the inclusion ratio equals:
1 - (GSTT exemption used / (funding amount - charitable deduction))
For example, if the funding amount is $1,000,000, the charitable deduction is $400,000 and the GSTT exemption used is $500,000, the GSTT inclusion ratio is:
1 - ((500,000 / (1,000,000 - 400,000)) = 0.16667
Bequests and trust distributions: Computing the inclusion ratio for trust distributions can be complicated.
Lead unitrusts: IR = 1 - (GST exemption used / (principal placed in trust - gift tax deduction)).
Lead annuity Trusts: IR = (principal at termination - GST adjusted exemption) / principal at termination.
Regular irrevocable trusts: IR = 1 - (GST exemption used /principal placed in trust).
Bequests to individuals: IR = (bequest amount - estate tax on bequest -GSTT - GSTT exemption used) / bequest amount - estate tax on bequest - GSTT).
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