GBTC vs IBIT: what the fee gap hides about how each fund is built

GBTC charges an annual expense ratio of 1.50%. IBIT charges 0.25% on an ongoing basis, per CoinFeeds, BTC ETF Calc, Mezzi and Spark Money. Swan Bitcoin cites the same 0.25% figure, but its own article frames it as a promotional rate — “0.25% for the first 6 months or $5 billion” in assets, whichever came first — not a confirmed standing fee, so it isn’t counted among the four outlets confirming the ongoing rate. The fee gap is the number most comparisons stop at. It shouldn’t be the only one. The two funds hold the same asset, bitcoin, but they were built differently, they are taxed differently for existing holders, and the sources disagree on how their share creation actually works today.

Two different starting points

Shares of the Grayscale Bitcoin Trust date back to 2013, when the trust traded privately with accredited investors before moving to over-the-counter markets, according to CoinFeeds. Grayscale applied to convert it into a spot ETF in 2017 and the SEC denied the application; the trust had reached $1 billion in assets under management that same year, per CoinFeeds. Grayscale eventually sued the SEC, and a US court ordered the regulator to allow the conversion. GBTC became a spot bitcoin ETF on January 11, 2024, according to BTC ETF Calc, Mezzi and Spark Money — it converted an existing trust rather than launching a new fund.

IBIT took the other path. BlackRock’s iShares Bitcoin Trust launched as an ETF from day one on January 11, 2024, per BTC ETF Calc and Spark Money. It never traded over the counter and never carried the pricing quirks of a closed-end trust.

Swan Bitcoin’s own comparison, dated June 30, 2024 — nearly six months after GBTC’s ETF conversion — still describes GBTC as “a trust, not an ETF” that “trades over the counter (OTC)” and can trade “at significant premiums or discounts” to the bitcoin it holds. That characterization looks out of date at the time Swan published it: GBTC had already converted to an ETF structure by January 11, 2024, per BTC ETF Calc, Mezzi and Spark Money. This page flags the inconsistency rather than resolving it. It isn’t clear from the evidence whether Swan was describing GBTC’s pre-conversion behavior loosely, or simply hadn’t updated its structural description after the conversion took effect.

Mezzi, in an update dated July 2, 2026, gives a cleaner account of the same mechanism: before conversion, it says, GBTC traded at premiums or discounts to net asset value because it lacked a redemption program, and after the ETF conversion, the addition of a creation and redemption process brought the market price closer to NAV.

What the fee actually costs

BTC ETF Calc’s article text runs the fee gap through a simple example: on a $50,000 investment, GBTC’s 1.50% fee works out to $750 a year, against $125 a year for IBIT’s 0.25%, per the site’s worked example. The site also hosts a separate interactive fee calculator on the same page, which shows different totals — $728 in fees for GBTC against $124 for IBIT, for a $603 saving — over what the site labels a five-year horizon, without stating the investment amount those totals assume. The two figures on the same page describe different scenarios and shouldn’t be read as the same number. Mezzi, in the same July 2, 2026 update, runs a similar exercise and estimates that on a $50,000 investment held over five years, IBIT could save an investor roughly $603 in fees compared with GBTC, while GBTC’s fee would amount to approximately 0.0410 BTC in bitcoin terms over the same stretch. Spark Money, as of March 2026, widens the lens: on a $100,000 position held five years, the gap between GBTC’s 1.50% fee and Franklin Templeton’s EZBC at 0.19% exceeds $6,500 in cumulative cost, assuming a flat bitcoin price. Spark Money also states that GBTC still generates roughly $223 million a year in fee revenue as of March 2026 — more, it says, than every other spot bitcoin ETF combined, despite the fund’s outflows.

The tax trap

If the fee gap were the whole story, GBTC would have emptied out by now. BTC ETF Calc explains why it hasn’t: many GBTC holders bought in years ago at far lower prices, and selling now to move into a cheaper fund means realizing a capital gain. The site’s worked example: an investor who bought GBTC at $10 a share and sees it trading at $60 owes tax on a $50 gain per share if they sell. Often, BTC ETF Calc argues, that one-time tax bill outweighs years of fee savings from switching. Mezzi makes the same point in its July 2, 2026 update: existing holders with large unrealized gains may face a bigger cost from selling than from staying and absorbing the higher fee.

Grayscale’s answer was to spin off a second, cheaper fund rather than cut GBTC’s own fee. The Grayscale Bitcoin Mini Trust, ticker BTC, charges 0.15% — the lowest permanent fee among the funds cited by BTC ETF Calc, Mezzi, Swan Bitcoin and Spark Money. Existing GBTC holders received Mini Trust shares proportionally, according to BTC ETF Calc, which lets them shift into a lower-cost vehicle without triggering a taxable sale. Spark Money dates the Mini Trust’s launch to July 31, 2024, and says it was seeded with roughly 10% of GBTC’s bitcoin holdings at the time.

Creation and redemption: the sources disagree

Here the record gets genuinely unresolved. Spark Money, in its March 2026 comparison, states plainly that none of the original 11 spot bitcoin ETFs allow in-kind creation and redemption — meaning authorized participants settle all transactions in cash, not in bitcoin itself, which the site says introduces a small amount of tracking error against the spot price. But Bitcoin.com News, reporting on August 11, 2026, describes BlackRock actively expanding an in-kind conversion mechanism for IBIT specifically. The outlet reports that BlackRock’s head of digital assets, Robbie Mitchnick, said on Bloomberg Television that the minimum size for converting bitcoin directly into IBIT shares had been cut to $1 million from a prior $25 million threshold. Of the previous threshold, Mitchnick said: “It used to be $25 million.” Bitcoin.com News reports that Mitchnick has said BlackRock wants to eventually make in-kind conversion available “at any transaction size.”

Bitcoin.com News’s own account complicates a clean reading of that contradiction. The outlet states that regulators cleared BlackRock and other issuers to offer in-kind conversion on spot bitcoin ETFs “earlier in 2026” — after Spark Money’s March 2026 snapshot. It’s possible the two sources are describing different points in time rather than flatly disagreeing: Spark Money may have been accurate for the period it covered, and the rule may have changed afterward. But neither source pins down the exact date the mechanism became available, so this page cannot confirm which reading is correct. It states both accounts, attributed, and leaves the gap standing rather than picking one.

The practical stakes of that mechanism, per Bitcoin.com News: in-kind conversion lets an institution that already holds bitcoin move into IBIT shares without first selling for cash, which can avoid triggering a taxable event, and a lower minimum widens the pool of authorized participants who can arbitrage the fund’s price against its holdings.

The numbers that won’t line up into one picture

Because these sources were published at different points between 2024 and 2026, none of their asset or holdings figures can be read as a single current snapshot. The table below shows what each source reported, and when.

CoinFeeds also notes two one-off events that pressured GBTC’s price in early 2024: a US court allowed Gemini to sell 31.2 million GBTC shares, valued by CoinFeeds at $1.6 billion, and bankrupt exchange FTX was separately cleared to sell its stake in the trust. Neither figure carries a precise date in the CoinFeeds article beyond “the first few weeks of January.”

What this page does not tell you

• It cannot state either fund’s current assets under management, bitcoin holdings or cumulative outflow as one number. Every figure above was reported on a different date, by a different outlet, using its own methodology, spanning 2024 to 2026 — they are not a single trend line and should not be averaged or treated as current.
• None of the six sources used here is a primary document. There is no fund prospectus, SEC filing, or issuer fee disclosure in the evidence behind this page — the structural claims about how creation and redemption work rest on secondary reporting and third-party comparison tools, not on GBTC’s or IBIT’s own registration statements.
• The apparent contradiction between Spark Money’s claim that no spot bitcoin ETF allows in-kind creation and redemption, and Bitcoin.com News’s account of BlackRock expanding in-kind conversion for IBIT, may partly reflect a timing gap rather than a factual disagreement — but neither source dates the change precisely enough for this page to say so with confidence.
• CoinFeeds’s figures for GBTC’s price, its $14 billion-plus outflow total and its AUM are given without a specific calendar date beyond “as of this writing” — useful as a data point from whenever that article was written, not as a current figure.
• Nothing here is a recommendation to hold, sell or switch between these funds. The tax consequences of selling GBTC depend on an individual investor’s cost basis and circumstances, which none of these sources can assess for a specific reader.

Sources

Every fact above is attributed to one of these reports. Where they disagree, the article says so.

• TheCoinrise reference desk
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