The fee layer: what a sponsor fee compounds to over time
Where the running cost of a listed product is taken from, how it erodes coins per share, and what sits alongside the headline rate.
A listed product charges a sponsor fee expressed as an annual percentage of assets. It is accrued daily and, in most spot products, paid by selling a small quantity of the holdings, which means the fee is never invoiced to the holder and never appears as a line on a statement. It shows up instead as a slow decline in the quantity of the asset each share represents. Over long horizons that decline is the dominant difference between the wrapper and the asset.
Where the money comes out
The trust holds only the asset. It has no cash income, no coupon and, in most designs, no staking reward, so the only way to pay a bill is to sell part of what it holds. Each day the administrator accrues one day's share of the annual rate against net asset value, and periodically the sponsor directs the sale of enough of the asset to settle the accrual. Coins per share therefore falls monotonically. The share price still tracks the asset, because net asset value per share moves with price, but it tracks a slowly shrinking quantity of it.
A unified fee is common: the sponsor takes one number and pays the custodian, the administrator, the auditor, the trustee, the index provider and the legal costs out of it. That makes cross-product comparison of the headline rate meaningful, but it also means the rate can be, and often is, waived or reduced for a promotional period, sometimes on the first tranche of assets or for the first months after launch. A waiver that expires is a change in the compounding rate, not a change in the product.
What a rate compounds to
The arithmetic is a geometric decay. Ignoring the difference between daily and annual accrual, the quantity of the asset retained per share after a number of years is approximately the annual retention rate raised to that number of years. The illustrative table below shows the fraction of the original coins per share that survives, for hypothetical annual rates chosen only to show the shape of the curve. These are not the rates of any live product.
| Illustrative annual fee | After 1 year | After 5 years | After 10 years | After 20 years |
|---|---|---|---|---|
| 0.15% | 99.85% | 99.25% | 98.51% | 97.04% |
| 0.25% | 99.75% | 98.76% | 97.53% | 95.12% |
| 0.75% | 99.25% | 96.31% | 92.76% | 86.05% |
| 1.50% | 98.50% | 92.72% | 85.97% | 73.91% |
| 2.00% | 98.00% | 90.39% | 81.71% | 66.76% |
Two features of the table are worth stating plainly. The differences look trivial in year one and are not trivial in year twenty, because the erosion applies to a shrinking base and never reverses. And the difference between two products is the difference in these numbers, not the difference in the headline rates: a gap of a percentage point per year is close to a fifth of the position over two decades.
The costs that sit beside the headline rate
The sponsor fee is the visible layer. Total cost of ownership includes several others, and their relative size depends on how long a position is held and how it is traded.
- The bid-ask spread in the shares, paid on the way in and on the way out. On a product with modest volume this can exceed a year of the sponsor fee in a single round trip.
- Brokerage commissions or platform charges, which are outside the product entirely.
- Execution cost inside the trust under a cash creation model, where the trust rather than the authorized participant buys and sells the asset, and the resulting slippage is borne by all holders.
- Tracking difference from the timing of the reference window, which is not a fee but shows up in the same place.
- Any drift between the exchange price and net asset value at the moment of trading, which is the premium or discount question.
For a proof-of-stake asset there is a further item that does not appear in any fee table. A product that does not stake forgoes the network reward that a direct holder could earn, and that forgone amount is economically indistinguishable from an additional annual charge. Its size can be read from nominal staking yield, and its meaning is clearer after subtracting supply growth, which is what real staking yield does. Where a product does stake, the reward is usually shared between holders and the sponsor, and the sharing ratio matters as much as the fee. Staking inside a wrapper also introduces the liquidity and slashing considerations covered elsewhere on this site.
Comparing the wrapper with direct holding on cost alone
Direct holding is not free either, and the honest comparison sets both sides out. Direct costs include trading fees at the venue where the asset is bought, on-chain transfer fees visible as average transaction fee, hardware for cold storage, and any charge for a third-party custody arrangement. The uncosted items are larger: the operational work of key management, the tail risk of key loss, and the record keeping needed to reconstruct a transaction history. A wrapper converts those into a fee and a counterparty. Which arrangement costs more depends on size, horizon and how the holder values operational effort, and the calculation differs for every reader.
Fee comparisons across live products, including waiver status, sit on the ETP pages, and aggregate assets in the channel are tracked as ETP assets under management. The next page in this track examines what the custodian behind those products actually does, which is where a large part of the fee goes.