Solana is taking another swing at tightening its monetary policy. Two governance proposals, SIMD-0550 and SIMD-0553, are advancing through the network’s voting process this week, and together they represent the most aggressive tokenomics overhaul Solana has attempted since the failed SIMD-0228 vote in early 2025.
What SIMD-0550 and SIMD-0553 actually do
SIMD-0550, submitted on June 2, 2026, by Helius engineer lostintime101, doubles the annual disinflation rate from 15% to 30%. Solana’s inflation rate currently decreases by 15% each year, slowly grinding down toward a terminal rate. At the current pace, reaching that terminal rate takes roughly 5.7 years. SIMD-0550 would compress that timeline to about 2.8 years. By accelerating the decay curve, the proposal would eliminate approximately $1.5 billion in future SOL emissions over six years.
SIMD-0550 has already cleared a meaningful hurdle. The proposal has been promoted for a formal Solana Governance Proposal vote, with Anza reviewers signaling near-approval through GitHub comments posted between June 10 and 14. Firedancer’s sign-off remains pending, which is the last major technical checkpoint before the broader validator community weighs in.
