Moneros Gebührenmarkt: Wie XMR Transaktionsgebühren Wirklich Funktionieren

Introduction: A Different Kind of Fee Market

If you have ever used Bitcoin during a period of high demand, you know the pain of fee spikes. When blocks fill up, users bid against each other for limited space, and fees can surge from a few cents to tens of dollars in a matter of hours. This auction-based fee market is a direct consequence of Bitcoin's fixed block size limit, a design choice that prioritizes scarcity of block space over predictable transaction costs.

Monero takes a fundamentally different approach. Instead of a fixed block size with an auction for space, Monero uses a dynamic block size with a penalty-reward system that allows blocks to grow organically in response to demand while discouraging abuse. The result is a fee market that is more predictable, more user-friendly, and better aligned with the goal of being usable digital cash. This article explains how it works.

Dynamic Block Size: The Core Innovation

Median Block Size

At the heart of Monero's fee mechanism is the concept of the median block size. Monero calculates the median size of the last 100 blocks and uses this as the reference point for determining how large the next block can be. The current minimum median is 300 kB, meaning that even during periods of zero activity, blocks can be at least 300 kB in size.

The Penalty-Reward System

When a miner creates a block larger than the current median, they incur a penalty on their block reward. The penalty is proportional to the square of the difference between the block size and the median. Specifically, if a block is B bytes and the median is M bytes, the penalty is:

Penalty = BaseReward * ((B/M) - 1)^2

This quadratic penalty means that small increases above the median incur negligible penalties, while doubling the block size would cost the miner their entire block reward. The practical effect is that miners will only create larger blocks when the transaction fees from the additional transactions exceed the penalty, creating a natural equilibrium between supply and demand for block space.

How the Block Size Adapts

When demand for block space increases, users attach fees to their transactions. Miners include these transactions in blocks, increasing the block size above the median. As blocks grow, the median gradually increases over the next 100 blocks, allowing more space. When demand decreases, blocks shrink, the median decreases, and the system contracts. This adaptive behavior means that Monero can handle temporary surges in transaction volume without the extreme fee spikes that characterize fixed-size blockchains.

The 2x Hard Limit

There is one absolute constraint: no block can be larger than twice the current median. This prevents a single miner from creating an absurdly large block that would strain the network. At a median of 300 kB, the maximum block size is 600 kB. If sustained demand pushes the median to 1 MB, blocks can be up to 2 MB. This soft ceiling grows with genuine demand but prevents sudden shocks.

Fee Calculation: How Your Transaction Cost Is Determined

Fee Per Byte

Monero transaction fees are calculated on a per-byte basis. The fee rate depends on the current block size relative to the median. When blocks are below the median (plenty of space available), fees are at their minimum. As blocks approach and exceed the median, the fee rate increases to compensate miners for the penalty they incur.

Fee Priority Levels

Monero wallets typically offer four priority levels for transactions:

• Default (x1): Standard fee, suitable for most transactions. Typically confirmed within 2-20 minutes.
• Low (x1): Same as default in most implementations. Used when you are not in a hurry.
• Medium (x5): Five times the default fee. Provides faster confirmation during busy periods.
• High (x25): Twenty-five times the default fee. For time-sensitive transactions when the network is congested.

In practice, the vast majority of Monero transactions use the default fee and are confirmed in the next block. Unlike Bitcoin, where choosing a low fee during congestion can mean waiting hours or days, Monero's dynamic block size means there is almost always room in the next block for your transaction at the default fee rate.

Minimum Relay Fee

Monero enforces a minimum relay fee that transactions must meet to be propagated across the network. This prevents spam attacks where an adversary floods the mempool with zero-fee or near-zero-fee transactions. The minimum relay fee is set per byte and adjusts dynamically based on the current median block size. When the median is at its minimum (300 kB), the minimum relay fee is approximately 0.00002 XMR per kB, which translates to roughly 0.00003-0.00005 XMR for a typical two-output transaction.

Bulletproofs and Bulletproofs+: The Fee Reduction Revolution

The Size Problem

Monero's privacy features come at a cost: transactions are larger than Bitcoin transactions because they include ring signatures, stealth address data, and range proofs. Range proofs, which demonstrate that transaction amounts are non-negative without revealing the actual amounts, were particularly costly in the original RingCT implementation, adding several kilobytes per output.

Bulletproofs (2018)

In October 2018, Monero deployed Bulletproofs, a more efficient range proof system developed by Stanford researchers. Bulletproofs replaced the original Borromean ring signatures for range proofs and reduced their size by approximately 80%. This single upgrade dramatically reduced transaction sizes and, consequently, transaction fees. A typical two-output transaction shrank from approximately 13 kB to about 2.5 kB.

Bulletproofs+ (2022)

In August 2022, Monero deployed Bulletproofs+, an improved version that further reduced proof sizes by approximately 5-7% compared to the original Bulletproofs. While the improvement was smaller in absolute terms, it continued the trend of making Monero transactions lighter and cheaper. A typical two-output transaction now weighs approximately 1.5-2 kB.

Combined Impact on Fees

The combined effect of Bulletproofs and Bulletproofs+ has been transformative. In 2017, a typical Monero transaction fee was approximately 0.01 XMR. By 2026, a standard transaction fee is approximately 0.00003-0.00005 XMR, a reduction of over 99%. At current prices, this translates to a fraction of a cent per transaction, making Monero one of the cheapest cryptocurrencies to transact with.

Comparison with Bitcoin's Fee Market

Bitcoin: Auction Model

Bitcoin's fee market operates as a first-price auction. Users attach fees to their transactions, and miners select the highest-paying transactions to fill the fixed 1 MB (4 MW) block limit. During periods of high demand, this creates a bidding war where fees escalate rapidly. In December 2017, average Bitcoin transaction fees exceeded $50. In 2023, the Ordinals inscription craze pushed fees above $30 again.

The Bitcoin fee market has several characteristics:

• Highly volatile: Fees can change by orders of magnitude within hours
• Unpredictable: Users cannot know in advance what fee will be sufficient
• Exclusionary: During fee spikes, small transactions become economically impractical
• Fixed supply: Block space is artificially scarce, driving competition

Monero: Adaptive Model

Monero's fee market is fundamentally different:

• Relatively stable: Fees change gradually as the median block size adapts
• Predictable: Default fees are almost always sufficient for next-block confirmation
• Inclusive: Even the cheapest transactions can be confirmed quickly
• Elastic supply: Block space expands with demand, preventing acute scarcity

The Trade-off

Bitcoin supporters argue that fixed block sizes and high fees create a "fee market" that will sustain miner revenue as the block reward diminishes. Monero supporters counter that the dynamic block size achieves the same goal more efficiently: miners are compensated for larger blocks through fees, while the penalty system prevents abuse. The trade-off is that Monero's blockchain grows faster during periods of high demand, increasing storage requirements for node operators. However, as discussed in our guide to running pruned nodes on MoneroSwapper, pruning mitigates this concern.

Real Fee Data and Trends

Historical Fee Trends

Monero's transaction fees have been on a consistent downward trend thanks to protocol improvements:

• 2017 (pre-Bulletproofs): Average fee approximately 0.01 XMR
• 2019 (post-Bulletproofs): Average fee approximately 0.0002 XMR
• 2023 (post-Bulletproofs+): Average fee approximately 0.00005 XMR
• 2026 (current): Average fee approximately 0.00003-0.00005 XMR

Fee Stability During Network Events

Even during periods of elevated transaction volume, such as exchange delistings that trigger mass withdrawals or speculative trading surges, Monero fees have remained remarkably stable. The dynamic block size absorbs demand spikes by allowing blocks to grow, preventing the fee auctions that plague Bitcoin. The most significant fee increases observed on Monero have been on the order of 2-3x the baseline, compared to 100x or more on Bitcoin during comparable demand spikes.

The Future: Seraphis and FCMP++

Monero's upcoming protocol upgrades, including Seraphis (a new transaction protocol) and FCMP++ (Full-Chain Membership Proofs), will change the fee calculus again. Seraphis transactions are expected to be somewhat larger than current transactions due to increased ring sizes and additional privacy features. However, the FCMP++ approach eliminates the traditional ring signature in favor of a proof that references the entire output set, dramatically improving privacy while potentially changing the transaction size profile.

The Monero research community is actively working on optimizations to ensure that these privacy improvements do not significantly increase transaction costs. The dynamic block size mechanism will continue to absorb demand fluctuations regardless of individual transaction sizes.

Conclusion

Monero's fee market is one of its most underappreciated features. While much attention is paid to its privacy technology, the economic design that keeps fees low, stable, and predictable is equally important for Monero's mission as usable digital cash. The dynamic block size with its penalty-reward system elegantly balances the needs of users (affordable transactions), miners (fair compensation), and node operators (manageable blockchain growth). Combined with the dramatic efficiency gains from Bulletproofs+, Monero transactions in 2026 cost fractions of a cent and confirm reliably within minutes. For anyone using MoneroSwapper to acquire XMR, you can rest assured that moving your Monero around afterwards will cost virtually nothing.