SUI Inflation Analysis · August 2026 · Supply growing, projected to keep growing
Sui adds about 64.5M SUI to circulation over the next 90 days — roughly 40.2M from scheduled unlocks and 24.3M from the staking subsidy — while the Sui Foundation's stablecoin-funded buyback takes back only about 0.8M, and even that is handed back out rather than burned. The MrNasdog Pressure Framework reads +1.56% net forward, easing from +1.68% over the last 90 days as both the monthly release step and the subsidy shrink. SUI is capped at 10B total supply, but only about 41% of it circulates — the unlock calendar, not a protocol mint, is the whole story.
The verdict, in one paragraph
Over the last 90 days the MrNasdog Pressure Framework reads SUI at +1.68% net: about 69.1M SUI of new float against roughly 0.5M SUI of buy-side offset, on a circulating base of 4,074.5M SUI. Our supply monitor reads the same trailing window at +1.82%, a gap of about 0.14 percentage points — comfortably inside tolerance, so this build ships no monitor-gap chip and needs no reconciliation walk. The two agree for a structural reason: the Sui Foundation publishes its own month-by-month circulating-supply schedule, the broad market republishes that number verbatim, and the framework books the same series instead of inferring one. Looking forward, the framework reads +1.56% for the next 90 days. SUI is structurally inflationary on the active float — a hard-capped token whose supply can never shrink, releasing a shrinking but still relentless monthly tranche of previously locked coins.
Sell pressure: where new SUI comes from
Sell #2 — vesting unlocks — is the dominant row, at a net 42.1M SUI over the last 90 days across three monthly steps and about 40.2M SUI over the next three. Sui does not release locked supply in lumpy annual cliffs; it steps circulating supply up once a month on a published calendar that runs to 2030, drawing from the Community Reserve, the Mysten Labs treasury, the early-contributor allocation and the Series A and Series B investor tranches. The most important fact about that calendar is that the step got much smaller: the monthly increase ran at roughly 52M SUI through May 2026 and fell to roughly 22M SUI from June onward, easing further toward about 20.8M SUI by November. The cliff dates are what decide this row, and they were checked one by one against the window: Jun 1 2026 (+23.78M), Jul 1 2026 (+23.13M) and Aug 1 2026 (+22.20M) all land inside it and each contributes its full quantum, while May 1 2026 — the last of the big 52M SUI steps — falls 26 days outside and contributes nothing. A window opening less than four weeks earlier would have roughly doubled this row.
Sell #1 — protocol inflation — is the Sui staking subsidy, and on Sui it is a finite escrowed pool rather than an open-ended mint. Reading the Sui mainnet system state directly on-chain, the network distributes 282,430 SUI per epoch, and one Sui epoch is exactly one day. Crucially, that pool is readable at both ends of the window: it held about 269.9M SUI three months ago and about 242.9M SUI today, so the realised outflow was 27.0M SUI — identical to the scheduled quantum, because the protocol forces the distribution every epoch and no backlog can build up. The rate steps down 10% every 90 epochs by protocol rule — it stepped on Jul 16 2026, inside the last window, and steps again around Oct 14 2026, inside the forward one — and the pool has only about 242.9M SUI left in it — a little over two more years at the current rate. This is the part of SUI inflation that is genuinely mechanical, genuinely predictable, and genuinely disappearing.
Sell #3 — foundation and unscheduled unlocks — is zero on this build, but the overhang behind it is enormous. About 5,925.5M SUI remains outside circulation. The framework books nothing here because the scheduled portion releases through the same monthly calendar already counted in Sell #2, and no unscheduled Sui Foundation outflow was observed in the window. Sell #4 — long-term locked or bankruptcy — is zero by construction: Sui is a live project with no bankruptcy estate, no trustee distribution schedule and no court-ordered release affecting SUI.
Buy pressure: where new SUI goes
Buy #1 — programmatic buyback — is real but small. The Sui Foundation repurchases SUI on the open market every day, funded by yield earned on its stablecoin reserves. Its own published purchase ledger runs from Jun 22 2026 to Aug 23 2026 and records about 501K SUI bought for roughly $359K, averaging 8.4K SUI a day and near 9.3K lately, which projects to about 0.8M SUI forward. The catch is the destination: bought-back SUI is not burned and not held. It is reinvested into the Sui ecosystem as grants, developer programmes, liquidity incentives and validator support, so the coins flow straight back to the float and are tracked as a matching Sell #3 flow-back. The buyback is genuine open-market demand, but it is a redistribution loop, not a supply sink.
Buy #2 — protocol fee burn — is zero because Sui destroys nothing at all. Computation gas is paid straight through to validators and stakers, and storage fees flow into a permanent storage fund that spends only the returns on its capital, with deletion rebates refunded to users rather than destroyed. The recycling is provable rather than asserted: summed across all 90 epochs of the window, total staking rewards minus the staking subsidy equals total gas fees exactly, so every SUI paid in computation fees went back out to stakers and none was destroyed. Buy #3 — foundation buy — is zero beyond the buyback already counted: the Sui Foundation discloses no separate open-market accumulation programme. Buy #4 — new long-term lock — is zero, and Sui makes the reason unusually clear: on-chain total stake is about 7,185.1M SUI across 128 active validators, which exceeds circulating supply outright, because locked and unvested SUI can be staked before it vests. Staked SUI is therefore not removed float, a Sui delegator can withdraw at the next epoch — one day later — and no new fixed-size lockup was announced in the window.
Foundation and overhang
The team-controlled overhang on Sui is the largest single fact about SUI supply. Roughly 5,217.2M SUI — about 52% of total supply — sits in a tranche with no release calendar at all before 2030, controlled by the Sui Foundation and released at its discretion thereafter. Another 708.3M SUI is queued on the published monthly schedule between now and 2030, and the staking subsidy pool holds a further 242.9M SUI that drains at a protocol-fixed rate no one can accelerate. The Mysten Labs treasury, at about 1.6%of supply, releases inside the same monthly schedule. The buyback destination is the one opaque item: the Sui Foundation has not published a buyback wallet address, and the tokens are dispersed to ecosystem partners rather than parked, so it is monitored through the Foundation's own disclosure on a bi-weekly walk. The trigger is simple — if any of these balances falls between refreshes, the outflow enters Sell #3 at the next refresh, and the framework will book it as real sell pressure rather than potential.
How SUI compares to other capped Layer 1 chains
SUI belongs to a specific and often misread class: the hard-capped, fully-premined Layer 1. Total supply is fixed at 10B SUI and every coin was minted at genesis, so unlike an uncapped continuous-emission chain, SUI can never mint a coin that did not already exist. That sounds deflationary and is not. The measure that matters to a holder is the tradable float, and on Sui the float is only about 41% of the cap, with the rest arriving on a calendar. A halving-model chain with a hard cap issues new coins slowly but has essentially no locked overhang; Sui has no issuance in the strict sense but carries a 5,925.5M SUIoverhang that behaves exactly like issuance from the market's point of view.
Against an uncapped Layer 1 with a fee burn, the contrast is sharper still. Those chains mint continuously but destroy a share of every transaction fee, so heavy usage can push net supply negative. Sui has the opposite shape: no mint and no burn. Because there is no burn anywhere in the Sui design, network activity cannot reduce SUI supply no matter how high it goes — a Sui that processes ten times today's transactions still runs the same unlock calendar. The one genuinely favourable structural comparison is against a peer whose unlock schedule is still accelerating: Sui's monthly step is unambiguously in decline, from 52M SUI in May 2026 to about 20.8M SUI by November, and the staking subsidy shrinks 10%every 90 days on a rule no vote can reverse. SUI's inflation is high today and mathematically committed to falling.
What to watch in the next 90 days
Four dated items would move this reading. First, the monthly circulation steps on Sep 1 2026, Oct 1 2026 and Nov 1 2026, adding roughly 22M, 21.7M and 20.8M SUI respectively — if any step lands materially above its published figure, the schedule itself has changed. Second, the staking subsidy step-down around Oct 14 2026, which cuts the per-epoch distribution by 10% and is already priced into the forward column. Third, the Sui Foundation buyback ledger: it runs near 9.3K SUI a day today and scales with stablecoin reserves, so a large jump in reserve size would lift the only buy row on the page. Fourth, any Sui Foundation disclosure touching the post-2030 tranche — a decision to release any part of that 5,217.2M SUIearly is the single event that would change SUI's inflation profile rather than merely nudge it.
Summary
The MrNasdog Pressure Framework reads Sui (SUI) as structurally inflationary on the active float: +1.68% net supply growth over the last 90 days and +1.56% projected for the next, against a supply monitor reading of +1.82% — a 0.14 percentage point gap that needs no reconciliation. The mechanism is a published monthly unlock calendar plus a finite, escrowed staking subsidy, with a small stablecoin-funded buyback that recycles rather than removes. The key risk is the overhang: 5,925.5M SUI — most of it in a post-2030 tranche with no calendar — sits outside the float, and Sui has no burn of any kind, so supply can only ever go up. The ceiling is the one genuine comfort: total supply is capped at 10B SUI, every coin already exists, and both the monthly step and the subsidy are contractually shrinking.
MrNasdog Pressure Framework analysis of SUI, Metric 1 — Inflation. Data + explanation only. Not financial advice. Updated Aug 25 2026.