IBDS vs TBIL: Differences, Returns & Fees
IBDS's duration was 0.8 years on Jul 31, 2026 and TBIL's 0.2 on May 31, 2026; IBDS charges 0.10% to TBIL's 0.15%. Net assets: $4.0bn on Oct 20, 2026 for iShares iBonds Dec 2027 Term Corporate ETF, and $7.6bn on Oct 19, 2026 for F/m US Treasury 3 Month Bill Fund.
IBDS costs 0.05 points a year less; their one-year returns differ by 0.4 points; TBIL is 1.9 times larger.
| IBDS | TBIL | |
|---|---|---|
| Expense ratio | 0.10% | 0.15% |
| Net assets, as of Oct 19, 2026 | $4.0bn | $7.6bn |
| Total return, 1 year | +3.3% | +3.7% |
| What it tracks | not read by ETFIQ | Bloomberg US Treasury Bellwether 3M Total Return USD Unhedged Index (I00087US) |
| Holdings in common | report dates differ | |
Holdings in common uses holdings dated May 31, 2026 and Jul 31, 2026.
IBDS and TBIL are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IBDS follows not read by ETFIQ and TBIL follows Bloomberg US Treasury Bellwether 3M Total Return USD Unhedged Index (I00087US).
- Number of holdings. IBDS holds 647 positions and TBIL holds 1.
- One-year total return (similar). Over 1 year to Oct 20, 2026 IBDS returned +3.3% and TBIL +3.7% with distributions reinvested, a gap of 0.4 points.
Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.
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On the same fields
IBDS and TBIL on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About IBDS
IBDS tracks an index. Over the year to Oct 20, 2026 it returned +3.3% with distributions reinvested. The prospectus expense ratio is 0.10% a year.
About TBIL
TBIL tracks an index. Over the year to Oct 20, 2026 it returned +3.7% with distributions reinvested. The prospectus expense ratio is 0.15% a year.
Questions people ask
- Which returned more over the last year, IBDS or TBIL?
- In the year to Oct 20, 2026, with distributions reinvested, IBDS returned +3.3% and TBIL +3.7%.
- Which is cheaper, IBDS or TBIL?
- IBDS is cheaper, by 0.05 percentage points a year. That is about $5 on $10,000 held for a year. Fees come from each fund's prospectus.
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ETFIQ, IBDS against TBIL, data as of Oct 20, 2026. https://etfiq.com/compare/any/ibds-vs-tbil
ETFIQ. (Oct 20, 2026). IBDS against TBIL. Retrieved from https://etfiq.com/compare/any/ibds-vs-tbil
[IBDS against TBIL (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/ibds-vs-tbil)
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