TIBMX Fees and Costs — Thornburg Investment Income Builder Fund, Class R5
Data updated: 2026-08-24
The net expense ratio is 1.02% (1.09% before fee waivers). There are no sales loads or redemption fees. In fiscal 2025 the fund paid $8.9M in broker commissions, 0.0590% of average net assets, and portfolio turnover was 28%.
TIBMX Fees and Expenses
Annual operating expenses and sales charges of TIBMX. Prospectus, as of August 20, 2026.
| Annual operating expenses | |
|---|---|
| Management fee | 0.69% |
| 12b-1 fee | 0.00% |
| Other expenses | 0.37% |
| Gross expense ratio | 1.09% |
| Fee waiver | −0.07% |
| Net expense ratio | 1.02% |
| Sales charges | |
|---|---|
| Max front load | 0.00% |
| Max deferred load | 0.00% |
| Redemption fee | — |
| Expense limitation in place (N-CEN) | Yes |
| Fees waived or reduced during the year | Yes |
| Waived fees subject to recoupment | Yes |
TIBMX Costs Over Time
On $10,000 invested in TIBMX, assuming 5% a year before costs, total costs come to $674 over 5 years, cutting the return by 1.13% a year. Illustration, not a forecast: it assumes today's net expense ratio throughout (a fee waiver may end).
| $10,000 invested | Sell after 1 year | Sell after 3 years | Sell after 5 years |
|---|---|---|---|
| Value before costs | $10,500 | $11,576 | $12,763 |
| Fund expenses (net expense ratio 1.02%) | $107 | $334 | $579 |
| Trading costs (broker commissions) | $6 | $19 | $33 |
| Lost growth on money paid in costs | $0 | $17 | $62 |
| Total costs | $113 | $371 | $674 |
| Value after costs | $10,387 | $11,206 | $12,089 |
| Impact on return, per year | 1.13% | 1.13% | 1.13% |
TIBMX Trading Costs
Brokerage costs reported on SEC Form N-CEN for the fiscal year ending September 30, 2025.
- Explicit cost rate (commissions ÷ average net assets): 0.0590%
- Total broker commissions: $8.9M
- Bought from dealers (principal trades, not a cost): $5.2B
- Portfolio turnover (prospectus): 28%
- Securities lending: none during the year
TIBMX Agency Brokers
Commissions paid.
| Broker | Amount | Share |
|---|---|---|
| SG Americas Securities, LLC | $1.6M | 24.73% |
| BofA Securities, Inc. | $813K | 12.52% |
| Morgan Stanley & Co. LLC | $664K | 10.23% |
| J.P. Morgan Securities LLC | $647K | 9.97% |
| Barclays Capital Inc. | $619K | 9.53% |
| UBS Securities LLC | $470K | 7.24% |
| BNP Paribas Securities Corp. | $457K | 7.04% |
| Goldman Sachs & Co. LLC | $414K | 6.37% |
| Citigroup Global Markets Inc. | $406K | 6.25% |
| Jefferies LLC | $397K | 6.11% |
TIBMX Dealer Counterparties
Securities bought directly from dealers (principal trades).
| Broker | Amount | Share |
|---|---|---|
| State Street Bank and Trust Company | $4.8B | 95.62% |
| BNY Capital Markets, LLC | $42.7M | 0.84% |
| Wells Fargo Securities, LLC | $38.7M | 0.76% |
| Barclays Capital Inc. | $30.0M | 0.59% |
| J.P. Morgan Securities LLC | $26.9M | 0.53% |
| Antares Capital Corporation | $19.9M | 0.39% |
| Goldman Sachs & Co. LLC | $17.0M | 0.34% |
| BofA Securities, Inc. | $16.2M | 0.32% |
| Citigroup Global Markets Inc. | $15.8M | 0.31% |
| Stonex Financial Inc. | $14.7M | 0.29% |
Thornburg Investment Income Builder Fund Share Classes
Net expense ratio and maximum front-end load of each share class, cheapest first.
| Ticker | Class | Net expense ratio | Front load |
|---|---|---|---|
| TIBOX | Class R6 | 0.83% | none |
| TIBIX | Class I | 0.91% | none |
| TIBMX | Class R5 | 1.02% | none |
| TIBAX | Class A | 1.15% | 4.50% |
| TIBGX | Class R4 | 1.27% | none |
| TIBRX | Class R3 | 1.52% | none |
| TIBCX | Class C | 1.90% | none |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.