Updated September 5, 2026. Quick answer: Wisconsin’s deferral is not run by the Department of Revenue at all; it is a WHEDA housing-finance-agency loan program capped at $3,525 a year, charging the prime rate plus 1%, and its statutory lien only outranks liens recorded after it, not your existing mortgage.
A WHEDA loan program, not a Department of Revenue deferral
Wisconsin’s property-tax deferral, Wis. Stat. §§234.621 through 234.626, is administered by the Wisconsin Housing and Economic Development Authority, not the Department of Revenue; the state’s separate homestead credit under chapter 71 is a different program entirely. Eligibility runs to homeowners 65 or older, or a qualifying veteran of any age, with household income no more than $20,000 in the year before applying, a figure the statute does not index for inflation and that has not moved since it was set. Existing liens and judgments on the home cannot exceed 33% of its assessed value, and the home must otherwise be owned free and clear. The maximum annual loan is the lesser of $3,525 or the actual taxes, assessments, and delinquency interest and penalties due; a cap that has been frozen since 2011.
Prime-plus-1% interest, and a lien that only outranks what comes after it
Deferred amounts bear interest at the prime lending rate reported in the Federal Reserve’s H.15 statistical release, plus one percentage point, reset by WHEDA’s executive director every October 15 for the following year’s loans; a market-linked rate, not a fixed statutory percentage. A statutory lien attaches to the home automatically on first disbursement, and WHEDA records a notice with the county register of deeds; the statute gives that lien priority only over liens that originate after the notice is recorded, and is silent on overriding a pre-existing mortgage. The lien is enforced the same way a construction lien is, and the participant carries no personal liability for any shortfall if a later sale does not cover the full balance.
When it comes due, and how to apply
The loan becomes due and payable on transfer of the dwelling (except to an approved co-owner), the death of the participant or the last surviving co-owner, discovery of a false statement in the application, condemnation, the participant no longer meeting the eligibility requirements, failure to maintain fire and casualty insurance naming WHEDA as lienholder, or the participant’s own voluntary election to repay early. Applications are due by June 30 of the year the taxes or assessments are payable, on WHEDA’s own forms naming every co-owner, and the participant must occupy the home more than six months of the year, with qualifying health-facility stays counted toward that residency requirement.
Wisconsin’s broader senior property-tax picture, covering exemptions, freezes and circuit-breaker credits, not just the deferral: property tax breaks for seniors in Wisconsin.
How every state’s programme compares: property tax relief for seniors by state. What a deferral means in general, and who it catches out: the property-tax deferral lien trap.
Statutory text read at each state’s own legislature, revisor, or revenue agency this session. General information, not tax or legal advice; rates, caps and thresholds change most years and a county or state agency retains the final say on your own application.