This is the bluntest timeline any state has published, and it is worth repeating exactly: the Department of Natural Resources says it cannot estimate when rebates will be available and that they may not be available until 2027 at the earliest and potentially as late as 2028. No other state on this site says anything like it. Treat Missouri's federal rebates as absent from your planning.
Which is, perversely, useful. A vague "coming soon" leads people to postpone a furnace replacement through another winter. A stated horizon two years out tells you to make the decision on today's economics instead — and a failing heating system is not something to nurse for two years on the promise of a rebate.
Missouri submitted its application in late 2024 and is still working through selecting an implementation contractor. Programme rules, eligibility and application mechanics are explicitly not finalised, so nobody — including any contractor who tells you otherwise — knows yet what will qualify.
That leaves your utility and the Department of Natural Resources' own financial assistance listings as the real options. Missouri's investor-owned utilities run their own efficiency programmes under state regulation, and those are unaffected by the federal delay.