Taxes & Insurance in Lake Forest

Lake Forest's tax picture carries a real, genuinely disclosed nuance: a comparatively lower property tax RATE than Illinois's own statewide median, but one of the highest dollar BILLS documented in this buildout, driven by very high home values.

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A genuinely lower rate, a genuinely higher bill

Lake Forest's median effective property tax rate runs 1.87% (Ownwell) -- below Illinois's own already-high statewide median (2.33%) -- yet its median annual bill ($16,682) is among the highest documented anywhere in this project's Illinois buildout, because that lower rate applies against genuinely very high home values.

Illinois's flat income tax and real retirement-income exemption

Illinois's statewide flat 4.95% income tax applies to wages in Lake Forest exactly as elsewhere in the state -- but Illinois taxes NONE of a retiree's Social Security, pension, or 401(k)/IRA income, a real, substantial benefit given Lake Forest's genuinely high senior population share (24.3%-26.7%, see the retiring topic page).

No Lake Forest-specific homeowners-insurance figure identified

This research pass did not find a Lake Forest-specific homeowners-insurance premium figure distinct from Illinois's statewide range ($2,402-$3,108/year, per illinois.js) -- disclosed as a gap. Lake Forest's genuinely high home values likely push actual premiums above this statewide range in practice; confirm a current, address-specific quote directly.

Key takeaways

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Last reviewed: 2026-08-25. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.