DOT Inflation Analysis · October 2026 · Supply growing · projected to keep growing

Polkadot's supply is growing, and it will keep growing at the same pace for the next 90 days. The network minted 13.78M DOT in the 90 days to Oct 3 2026 and burned nothing that we can count, so DOT supply rose a net +0.81%, against +0.57% on our independent monitor. The pace is fixed by Polkadot's 2.1B DOT hard cap: about 55.9M new DOT a year until the next step down on Mar 14 2028.

The verdict, in one paragraph

Over the last 90 days DOT supply grew a net +0.81% of the 1.71B DOT in circulation, and the next 90 days are projected at the same +0.81%, because Polkadot issuance is a fixed drip that does not change until 2028. Our independent supply monitor reads +0.57% for the same window, a gap of 0.24 percentage points. That is inside our 0.5-point limit, so no warning chip is shown and both readings agree on the direction. Polkadot today is a capped chain that is still inflationary by design: new DOT comes in every day, and since the Treasury burn was switched off, almost nothing goes out.

Sell pressure: where new DOT comes from

Protocol inflation is the whole sell side. Polkadot mints 127.61 DOT every 72 seconds, which is about 153,132 DOT a day and 13.78M DOT over 90 days. We read the DOT total supply on Polkadot Asset Hub at both ends of the window: it rose by 13,781,937 DOT, within 63 DOT of what the mint pace predicts. The rate comes from Referendum 1710, the community vote that set the 2.1B DOT cap. On Mar 14 2026 it cut yearly issuance from about 120M DOT to about 55.9M DOT. Every two years the yearly amount resets to 13.14% of the DOT still left to mint under the cap.

Each drop of new DOT is split three ways, a split set by Referendum 1909 on Jun 29 2026: 45.2% goes to stakers, 22.6% to validators who lock their own DOT, and 32.2% to a reserve pool called the Dynamic Allocation Pool. All three shares are new coins, so all of them count as new supply, even the part that waits in the pool.

Vesting unlocks add 0. Polkadot has no team or investor unlock calendar left. About 20.74M DOT does sit in on-chain vesting locks, mostly grants that release slowly, but those coins are already counted as circulating, so a release only moves coins that are already in the float. Foundation and unscheduled unlocks add 0 for the same reason: the Polkadot Treasury and the reserve pool are both inside the circulating count. Long-term locks and bankruptcy add 0: no estate or trustee is paying DOT out, and the US funds that hold DOT bought their coins in the open market.

Buy pressure: where new DOT goes

The buy side is 0 this window. There is no programmatic buyback: no contract or treasury buys DOT back from the market. The protocol fee burn is also 0. Polkadot used to burn 1% of the Treasury every 24 days, but Referendum 1781 switched that off on Dec 7 2025, and transaction fees and validator penalties now flow into the reserve pool instead of being destroyed. DOT supply rose by the mint pace almost to the coin, which leaves no room for a burn on the main ledger.

One small burn is still live: the money Polkadot earns from selling blockspace (coretime) is burned. The latest sale sold 34 cores at about 10.6 DOT each, and with renewals the total stays under about 30K DOT per 90 days, less than 0.002% of supply. We can see it on one side only, so we do not count it. A Foundation buy is 0: no announcement or on-chain flow shows anyone buying DOT for a treasury. A new long-term lock is 0 too. About 891M DOT is staked, but staked DOT still counts as circulating, and since Jul 6 2026 nominators can unstake within two days, so staking takes nothing out of the float.

Foundation and overhang

Polkadot has no single foundation wallet that sells on a schedule. The pools that could move DOT are run by on-chain votes. The Polkadot Treasury holds 24.31M DOT, up from 23.36M DOT at the start of the window, because it took in more than it spent. The Dynamic Allocation Pool reserve holds 5.16M DOT, up from 0.70M DOT, as it collects its 32.2% share of new coins plus fees and penalties. About 20.74M DOT more sits in slow-release vesting locks.

All of these balances are already part of the 1.71B DOT circulating supply, so when governance spends them, the coins move inside the float and do not add new supply. We read both pools on-chain at every rebuild. If the Treasury or the reserve pool balance falls between refreshes, that outflow enters Sell #3 at the next refresh, and the same goes for any change that moves these pools outside the circulating count.

How DOT compares to other capped proof-of-stake chains

Polkadot sits between the two common models. Bitcoin has a hard cap of 21M BTC and cuts its new-coin reward in half about every four years, with no burn. Ethereum has no cap at all: it pays validators in new ETH every epoch and burns part of every transaction fee, so its supply can rise or fall. Polkadot now has a hard cap like Bitcoin, at 2.1B DOT, but pays its stakers like a proof-of-stake chain, and it steps issuance down every two years instead of every four.

The other difference is the burn. Many proof-of-stake chains offset some of their issuance by burning fees. Polkadot chose the opposite in 2025 and 2026: it kept fees and penalties inside a reserve pool that governance can spend, and it stopped the Treasury burn. That makes Polkadot's supply easy to forecast, close to a fixed line of about 153K DOT a day, but it also means demand for blockspace does nothing to shrink supply. At +0.81% per 90 days, DOT inflates faster than a halving chain late in its schedule, and much slower than Polkadot did before Mar 2026, when the pace was about twice as high.

What to watch in the next 90 days

The dotUSD vote. Referendum 1944, a native stablecoin for Polkadot, has been in its decision window since Sep 9 2026, and the window ends about Oct 7 2026. It would put Treasury DOT into a DOT and dotUSD pool. That DOT is already in the float, so it books 0 here.

Bringing the burn back. A draft wish for change posted on Aug 21 2026 asks to restore a Treasury burn of 0.5% per period and to cap the Treasury at 1.5% of circulating DOT. It is a draft, not a vote. If it passes, Buy #2 would turn on.

The reserve pool budget. Any new budget vote that changes the 45.2 / 22.6 / 32.2 split, or spends the 5.16M DOT reserve, would change who receives new DOT, though not how much is minted.

Burns for JAM blockspace. A wish for change passed on Aug 21 2026 asks to burn all DOT revenue from future JAMKB sales. No sales exist yet, and a vote for a keyless burn account was rejected on Sep 27 2026, so nothing is booked.

The next issuance step. The next cut comes on Mar 14 2028, outside this window. Until then, about 153,132 new DOT arrive every day.

Summary

DOT supply is growing at +0.81% per 90 days, from 13.78M DOTof new issuance and no counted burn, and our monitor agrees within 0.24 points. The mechanism is a fixed drip under Polkadot's 2.1B DOT hard cap, about 55.9M DOT a year until Mar 14 2028, split between stakers, self-staking validators and a governance reserve pool. The main risk is that the Treasury and reserve pool keep growing with no burn to offset them, so supply only goes one way. The ceiling is firm: Polkadot can never pass 2.1B DOT, and each two-year step mints less than the last.

MrNasdog Pressure Framework analysis of DOT, Metric 1 — Inflation. Data + explanation only. Not financial advice. Checked Oct 3 2026.