Quick answer: exemption of $3,000,000, then a flat 13% up to $7.1M of taxable estate, climbing in steps to 16% above $10.1M. Run your own numbers in the Minnesota estate tax calculator.
The full bracket table, current law
A rate that climbed, then flattened at the bottom
Minnesota's entry rate has moved over the years — 9% in 2014, 10% in 2015-2016, 12% in 2017, and 13% for decedents dying in 2018 and thereafter, where it has stayed since. Unlike states that ease in at a low single-digit rate, Minnesota's very first dollar above the exemption is taxed at 13%.
An apportionment fraction for multi-state estates
The computed tax is multiplied by a fraction — the value of the Minnesota-situs gross estate (plus certain Minnesota-situs gifts) divided by the full federal gross estate — so a decedent with property spread across several states pays Minnesota tax only on the Minnesota-apportioned share. For a Minnesota resident with everything in-state, this fraction is simply 1.
Two narrow deductions, with a real recapture risk
Qualified small business property and qualified farm property can each receive a separate exclusion from the taxable estate — but if the qualified heir disposes of the property, or the business or farm stops qualifying, within three years of death, a recapture tax equal to 16% of the claimed exclusion becomes due six months after that disposition.
A local probate attorney can review your estate — many offer a free consultation.
Form M706 is due 9 months after death, the same deadline as the federal Form 706.