Bitcoin follows a predetermined issuance schedule that halves its block subsidy every 210,000 blocks and aims to stop issuing new BTC at 21 million. Ethereum has no equivalent fixed supply cap in its current official guidance: validators receive newly issued ETH, while transaction base fees are burned. As a result, ETH’s total supply can rise or fall over time, depending on issuance and burns. A period when more ETH is burned than issued is deflationary for that period; it does not mean Ethereum has adopted a permanent cap.
What “supply” means in this comparison
Two different processes shape a cryptocurrency’s circulating supply: issuance, which creates new units under protocol rules, and destruction, which removes units. A supply schedule describes when and how issuance changes. Net supply change accounts for both issuance and destruction over a given period.
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That distinction matters because a falling issuance rate is not the same thing as a falling total supply. Bitcoin’s new issuance declines at defined block-height milestones, but the rule does not say the existing supply is destroyed. Ethereum’s new issuance also changes, and its fee-burning mechanism can offset or exceed issuance. A claim about either asset’s “inflation” or “deflation” needs to specify whether it means newly created units or the net change in total supply over a particular period.
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A useful way to read the two systems is to ask three questions separately: What creates new units? What changes the rate of creation? What removes units? Bitcoin’s subsidy schedule answers the first two with a block-height rule and recurring halvings. Ethereum’s supply accounting has an issuance side tied to proof-of-stake validation and a separate burn side tied to network activity. The difference is not simply “limited” versus “unlimited”; it is scheduled gross issuance versus variable net supply change.
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How Bitcoin’s fixed issuance schedule works
Bitcoin’s protocol ties the reward for mining a valid block—the block subsidy—to block height. The subsidy started at 50 BTC and is cut in half every 210,000 blocks. Bitcoin’s Developer Guide describes that interval as approximately once every four years, but the exact trigger is the block count, not a calendar date. Block production does not occur on a perfectly fixed schedule, so “every four years” is a useful shorthand rather than a promise about the date of a future change.
Each halving reduces the number of new BTC paid out per block. The issuance rate therefore declines in steps rather than staying level from year to year. Bitcoin.org describes issuance as declining predictably until it halts at 21 million BTC. That stated endpoint is what makes Bitcoin’s supply framework different from Ethereum’s current one: the subsidy changes according to a predetermined progression toward a stated limit.
The schedule governs new issuance, not the price of BTC or the amount of bitcoin that any individual can buy, sell, or hold. Nor does “fixed schedule” mean the same quantity is created each year. The protocol rule is a halving every 210,000 blocks; the calendar interval is approximate, and the quantity of new BTC per block falls at each milestone.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsBitcoin’s cited guidance describes declining issuance and the 21 million total; it does not describe a routine transaction-fee burn corresponding to Ethereum’s base-fee burn. The two systems therefore differ not only in how new units are created, but also in the supply-reduction mechanism described by their official materials.
For readers comparing the word “fixed,” the important point is that the Bitcoin rule fixes the sequence of subsidy reductions by block height. It does not mean each reduction happens on an exact anniversary, nor that the annual quantity issued stays constant between halvings. The 21 million figure is the stated total issuance endpoint, while the interval between changes is expressed as a count of blocks.
How Ethereum’s issuance and burn work
Validators issue ETH under proof of stake
Ethereum’s current issuance model is tied to proof-of-stake validation. Validators help secure the network and receive protocol rewards denominated in ETH. The amount issued depends on protocol rules and the total ETH staked, so it is not a single fixed amount per year comparable to a simple calendar schedule. More or less ETH can be issued as staking participation changes.
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The Merge, completed on September 15, 2022, replaced proof-of-work mining as the means of producing valid blocks. Ethereum’s official explanation puts it plainly: “Mining is no longer the means of producing valid blocks.” The change ended execution-layer issuance associated with mining; it did not end ETH issuance altogether. Validator issuance continued on Ethereum’s consensus layer.
This transition is why a before-and-after comparison can be useful, provided it is labeled carefully. The Merge removed the proof-of-work mining component of ETH issuance and left proof-of-stake validator issuance in place. It did not turn off issuance entirely, and it did not itself introduce the base-fee burn. The burn had already begun with the London upgrade in August 2021.
Base fees are burned
Ethereum also removes some ETH from supply by burning the base fee paid for transactions. This mechanism comes from EIP-1559 and began with the London upgrade in August 2021, before the Merge. A base-fee burn reduces the amount of ETH in existence; it does not set a maximum supply or guarantee that total supply will decline.
Ethereum’s supply guide also identifies validator penalties as a way ETH balances can be reduced. This is distinct from transaction-fee burning: the fee mechanism burns base fees, while penalties can reduce validator balances. Both are relevant to supply accounting, but neither creates a fixed terminal supply limit.
The burn side responds to network demand. When the base fees paid for transactions result in more ETH being burned, that increases the downward pressure on net supply for the period; when the burn is lower relative to validator issuance, supply may instead grow. That relationship is why burn estimates should be tied to an interval rather than treated as a permanent setting.
Net change depends on issuance and burn together
For any period, the useful conceptual comparison is the ETH issued to validators against the ETH burned in base fees, with balance-reducing penalties also part of the broader picture. If issuance exceeds destruction, total supply grows for that period. If destruction exceeds issuance, total supply shrinks. Network demand affects the amount burned, while staking participation affects issuance; because both can vary, Ethereum can be net inflationary at one time and net deflationary at another.
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That is why describing ETH simply as “inflationary” or “deflationary” without a timeframe can mislead. Those labels refer to observed net supply change over an interval, not a permanent promise about the protocol’s future supply path. A deflationary interval does not establish that ETH will always shrink, just as positive issuance does not establish that supply must grow during every interval.
In practical terms, the accounting has more than one line. A dashboard might show gross issuance, which answers how much ETH was created through validator rewards. It might show burns, which answer how much was removed through base fees. Or it might show net change, which combines the two over a selected period and may also account for balance reductions. Those figures answer different questions; a headline about just one of them is not enough to determine whether total supply rose or fell.
Bitcoin and Ethereum side by side
| Question | Bitcoin | Ethereum |
|---|---|---|
| Where new units come from | Block subsidy paid to miners under proof of work | Rewards to validators under proof of stake since the Merge |
| What changes issuance | The subsidy halves every 210,000 blocks, approximately every four years | Validator issuance depends on protocol rules and the total ETH staked |
| How supply can be reduced | The cited official sources describe declining issuance, not an equivalent routine fee burn | EIP-1559 base-fee burns; validator penalties can also reduce balances |
| Long-term supply framing | Bitcoin.org states a total issuance limit of 21 million BTC | Ethereum’s current official supply guides describe dynamic supply and no equivalent fixed maximum |
| Key distinction | Scheduled issuance declines at block-height milestones | Net supply change varies with validator issuance and ETH burned |
The table separates three ideas that are easy to conflate: the source of new coins, the rule that changes issuance, and the mechanism that may reduce supply. Bitcoin’s halving schedule directly changes the block subsidy. Ethereum’s staking issuance and base-fee burn are separate moving parts. Comparing only a single annual issuance figure would miss that structural difference.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchFor a like-for-like comparison, keep the trigger and endpoint distinct. Bitcoin’s exact issuance trigger is a block-height milestone, and its official endpoint is 21 million BTC. Ethereum issuance is tied to the amount of ETH staked under protocol rules, while the base-fee burn reflects network activity. The cited Ethereum guides describe no matching fixed terminal supply figure. Ethereum’s net supply can still decline in a given period, but that is an outcome of the balance between issuance and burn, not an equivalent preset endpoint.
What Ethereum’s post-Merge figures do—and do not—show
Ethereum.org’s issuance explainer, last updated June 6, 2026, provides a parameterized example rather than a live October 2026 rate. Under its stated assumption of about 14 million ETH staked, it compares approximately 13,000 ETH per day of issuance before the Merge with approximately 1,700 ETH per day of staking issuance afterward. The page says the exact amount varies with the total ETH staked, and the burn rate varies with network demand.
Under those assumptions, the page estimates an approximately 88.7% reduction in annualized issuance after the Merge, comparing a pre-Merge example of approximately 4.61% annualized issuance with approximately 0.52% post-Merge issuance. Those percentages describe the page’s example and assumptions; they should not be treated as timeless or as a current reading of supply growth. They also concern issuance, not the net change after burns.
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The Merge’s supply effect is therefore best understood as a change in one side of the accounting: it ended execution-layer mining issuance, leaving proof-of-stake validator issuance. The base-fee burn was already in place from August 2021. Whether ETH’s supply rises or falls in a later period still depends on issuance and destruction together.
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The example’s approximately 1,700 ETH per day is not a fixed post-Merge allowance. The stated assumption of about 14 million ETH staked is central to interpreting it, because Ethereum’s page says issuance changes with the amount staked. Nor does the approximately 88.7% reduction mean ETH’s total supply fell by that percentage: it compares annualized issuance under the page’s stated pre- and post-Merge assumptions. To assess net supply change, burns must be considered separately.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does Ethereum have a fixed supply like Bitcoin?
Ethereum’s current official supply materials describe a dynamic supply, not a fixed maximum equivalent to Bitcoin’s stated 21 million BTC limit. The fact that ETH has been net deflationary during a particular period would not create such a limit. A fixed cap is a rule establishing a terminal maximum; a burn mechanism is a process that removes units and can, under some conditions, outpace issuance.
This is also why a smaller issuance rate after the Merge should not be confused with a supply cap. Lower issuance means fewer new ETH are created under the relevant conditions. It does not say that issuance will necessarily stop at a particular total supply. Conversely, the absence of a fixed maximum in the cited Ethereum guidance does not mean supply must rise continuously: burns can reduce it over an interval.
The comparison is about current protocol mechanics as described in the cited official documentation, not a guarantee that either network’s rules can never change. It also does not establish how either asset’s price will behave. Supply design is one factor in a market, not a price forecast.
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When a dashboard, article, or social post says ETH is “deflationary,” check what period it measures and whether it compares issuance with burns. A net decrease over a chosen interval is a statement about that interval, not proof of a permanent trend. A claim about issuance alone may report new ETH created while leaving out ETH burned.
- Check the timeframe. Net supply change can differ from one interval to another as staking and network use change.
- Separate issuance from net change. Validator rewards create ETH; base-fee burns destroy ETH. A gross issuance figure alone does not answer whether total supply rose or fell.
- Check the assumptions behind estimates. Ethereum.org’s example rates depend on about 14 million ETH staked and are not live rates.
- Do not turn a block rule into a calendar guarantee. Bitcoin’s halving trigger is every 210,000 blocks; “roughly every four years” is an approximation.
- Do not infer a cap from a burn. A variable burn can offset issuance, but it is not the same rule as Bitcoin’s stated 21 million limit.
Ethereum.org’s supply guide names Ultrasound.money and Etherscan among tools for tracking ETH supply and issuance. Such trackers can help answer what happened over a selected period, but the interpretation still depends on whether the displayed metric is gross issuance, burns, or net supply change.
A careful reader can use a simple sequence when evaluating a claim: identify the period being measured; check whether the figure is gross issuance, ETH burned, or net supply change; then look at the assumptions behind any estimate, such as the amount staked. If the claim compares Ethereum with Bitcoin, check whether it is comparing issuance with issuance or net supply change with net supply change. Mixing those categories can make a variable outcome sound like a fixed rule.
Sources
- Bitcoin Developer Guide: Block Chain — subsidy and 210,000-block halving rule.
- Bitcoin.org FAQ — predictable declining issuance and the 21 million BTC endpoint.
- Ethereum: The Merge — Merge date and transition away from mining.
- Ethereum: How The Merge impacted ETH supply — issuance and burn explanation, including the parameterized figures last updated June 6, 2026.
- Ethereum: Understanding ETH Supply and Issuance — dynamic supply, issuance, burns, and tracking tools.
Frequently Asked Questions
Does Ethereum have a fixed supply like Bitcoin?
Ethereum’s current official supply guides describe dynamic supply and no fixed maximum equivalent to Bitcoin’s stated 21 million BTC limit. Validator issuance continues, and base-fee burns can reduce ETH supply over a period, but a burn mechanism is not a permanent supply cap.
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Can ETH become deflationary?
Yes. ETH is net deflationary over a period when the amount burned exceeds the amount issued, with validator penalties also relevant to supply accounting. That describes the measured interval; it does not guarantee that supply will keep shrinking.
What does Bitcoin’s “every four years” halving mean?
The exact Bitcoin rule is that the block subsidy is halved every 210,000 blocks. Approximately four years is a calendar shorthand, not a guaranteed date, because the trigger is block height.
Did The Merge stop ETH issuance?
No. The Merge on September 15, 2022 ended proof-of-work mining as the means of producing valid blocks and ended execution-layer issuance associated with mining. Proof-of-stake validator issuance continued on Ethereum’s consensus layer.
Are Ethereum’s post-Merge issuance figures current rates?
Not necessarily. Ethereum.org’s issuance explainer, last updated June 6, 2026, gives an example of about 1,700 ETH per day in staking issuance under an assumption of about 14 million ETH staked. The page says the exact amount fluctuates with total ETH staked, and burns also vary with network demand.
The Bottom Line
Bitcoin’s subsidy follows a block-based halving schedule toward a stated 21 million BTC limit. Ethereum combines proof-of-stake validator issuance with a variable base-fee burn, so ETH’s net supply can rise or fall depending on staking and network activity. A temporary net decline is not a fixed cap.
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