Marital Share of a Pension in an Illinois Divorce: the fraction as service continues
2026 law · reviewed September 7, 2026
| Years in the plan after the divorce | Marital fraction | Marital portion per month | Former spouse's share per month |
|---|---|---|---|
| 0 | 15/20 = 75% | $3,000 | $1,500 |
| 5 | 15/25 = 60% | $2,400 | $1,200 |
| 10 | 15/30 = 50% | $2,000 | $1,000 |
| 15 | 15/35 = 43% | $1,714 | $857 |
| 20 | 15/40 = 38% | $1,500 | $750 |
The example pension ($4,000 a month, 5 years in the plan before the marriage and 15 during it) with more or fewer years of service after the divorce, at a 50% share (reviewed September 7, 2026).
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