v3.26.3
Shareholder Report
 12 Months Ended
Jul. 31, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Legg Mason Partners Income Trust
Entity Central Index Key 0000764624
Entity Investment Company Type N-1A
Document Period End Date Jul. 31, 2026
Shareholder Report Annual or Semi-Annual annual shareholder report
Class A  
Shareholder Report [Line Items]  
Fund Name Western Asset Income Fund
Class Name Class A
Trading Symbol SDSAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Income Fund for the period August 1, 2025, to July 31, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class A
$99
0.97%
[1]
Expenses Paid, Amount $ 99
Expense Ratio, Percent 0.97%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2026, Class A shares of Western Asset Income Fund returned  4.64%. The Fund compares its performance to the Bloomberg U.S. Universal Index, which returned 3.02% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
High-yield credit positioning
↑
Structured product positioning
↑
Emerging markets positioning
Top detractors from performance:
↓
Rates positioning
Use of derivatives and the impact on performance:
The Fund utilized Treasury futures, options, and swaps to manage duration, yield curve positioning, and credit exposure. In aggregate, these derivatives detracted from performance.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2026
 
1 Year
5 Year
10 Year
Class A
4.64
2.15
3.38
Class A (with sales charge)
0.63
1.27
2.93
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. Universal Index
3.02
0.00†
1.74
[2]
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 317,357,105
Holdings Count | $ / shares 531
Advisory Fees Paid, Amount $ 1,669,259
Investment Company Portfolio Turnover 67.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$317,357,105
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
531
Total Management Fee Paid
$1,669,259
Portfolio Turnover Rate
67%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [3],[4]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, Western Asset Management Company Ltd. ceased to serve as a subadviser to the Fund.
This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Western Asset Income Fund
Class Name Class C
Trading Symbol LWSIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Income Fund for the period August 1, 2025, to July 31, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class C
$174
1.71%
[5]
Expenses Paid, Amount $ 174
Expense Ratio, Percent 1.71%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2026, Class C shares of Western Asset Income Fund returned  3.87%. The Fund compares its performance to the Bloomberg U.S. Universal Index, which returned 3.02% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
High-yield credit positioning
↑
Structured product positioning
↑
Emerging markets positioning
Top detractors from performance:
↓
Rates positioning
Use of derivatives and the impact on performance:
The Fund utilized Treasury futures, options, and swaps to manage duration, yield curve positioning, and credit exposure. In aggregate, these derivatives detracted from performance.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2026
 
1 Year
5 Year
10 Year
Class C
3.87
1.41
2.65
Class C (with sales charge)
2.89
1.41
2.65
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. Universal Index
3.02
0.00†
1.74
[6]
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 317,357,105
Holdings Count | $ / shares 531
Advisory Fees Paid, Amount $ 1,669,259
Investment Company Portfolio Turnover 67.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$317,357,105
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
531
Total Management Fee Paid
$1,669,259
Portfolio Turnover Rate
67%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [7],[8]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, Western Asset Management Company Ltd. ceased to serve as a subadviser to the Fund.
This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C1  
Shareholder Report [Line Items]  
Fund Name Western Asset Income Fund
Class Name Class C1
Trading Symbol SDSIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Income Fund for the period August 1, 2025, to July 31, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class C1
$150
1.47%
[9]
Expenses Paid, Amount $ 150
Expense Ratio, Percent 1.47%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2026, Class C1 shares of Western Asset Income Fund returned  4.13%. The Fund compares its performance to the Bloomberg U.S. Universal Index, which returned 3.02% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
High-yield credit positioning
↑
Structured product positioning
↑
Emerging markets positioning
Top detractors from performance:
↓
Rates positioning
Use of derivatives and the impact on performance:
The Fund utilized Treasury futures, options, and swaps to manage duration, yield curve positioning, and credit exposure. In aggregate, these derivatives detracted from performance.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2026
 
1 Year
5 Year
10 Year
Class C1
4.13
1.70
2.95
Class C1 (with sales charge)
3.15
1.70
2.95
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. Universal Index
3.02
0.00†
1.74
[10]
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 317,357,105
Holdings Count | $ / shares 531
Advisory Fees Paid, Amount $ 1,669,259
Investment Company Portfolio Turnover 67.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$317,357,105
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
531
Total Management Fee Paid
$1,669,259
Portfolio Turnover Rate
67%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [11],[12]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, Western Asset Management Company Ltd. ceased to serve as a subadviser to the Fund.
This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class I  
Shareholder Report [Line Items]  
Fund Name Western Asset Income Fund
Class Name Class I
Trading Symbol SDSYX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Income Fund for the period August 1, 2025, to July 31, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class I
$68
0.66%
[13]
Expenses Paid, Amount $ 68
Expense Ratio, Percent 0.66%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2026, Class I shares of Western Asset Income Fund returned  4.97%. The Fund compares its performance to the Bloomberg U.S. Universal Index, which returned 3.02% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
High-yield credit positioning
↑
Structured product positioning
↑
Emerging markets positioning
Top detractors from performance:
↓
Rates positioning
Use of derivatives and the impact on performance:
The Fund utilized Treasury futures, options, and swaps to manage duration, yield curve positioning, and credit exposure. In aggregate, these derivatives detracted from performance.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2026
 
1 Year
5 Year
10 Year
Class I
4.97
2.43
3.69
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. Universal Index
3.02
0.00†
1.74
[14]
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 317,357,105
Holdings Count | $ / shares 531
Advisory Fees Paid, Amount $ 1,669,259
Investment Company Portfolio Turnover 67.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$317,357,105
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
531
Total Management Fee Paid
$1,669,259
Portfolio Turnover Rate
67%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [15],[16]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, Western Asset Management Company Ltd. ceased to serve as a subadviser to the Fund.
This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class IS  
Shareholder Report [Line Items]  
Fund Name Western Asset Income Fund
Class Name Class IS
Trading Symbol WAGIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Income Fund for the period August 1, 2025, to July 31, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class IS
$62
0.60%
[17]
Expenses Paid, Amount $ 62
Expense Ratio, Percent 0.60%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended July 31, 2026, Class IS shares of Western Asset Income Fund returned  5.03%. The Fund compares its performance to the Bloomberg U.S. Universal Index, which returned 3.02% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
High-yield credit positioning
↑
Structured product positioning
↑
Emerging markets positioning
Top detractors from performance:
↓
Rates positioning
Use of derivatives and the impact on performance:
The Fund utilized Treasury futures, options, and swaps to manage duration, yield curve positioning, and credit exposure. In aggregate, these derivatives detracted from performance.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended July 31, 2026
 
1 Year
5 Year
10 Year
Class IS
5.03
2.49
3.77
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. Universal Index
3.02
0.00†
1.74
[18]
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Aug. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 317,357,105
Holdings Count | $ / shares 531
Advisory Fees Paid, Amount $ 1,669,259
Investment Company Portfolio Turnover 67.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$317,357,105
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
531
Total Management Fee Paid
$1,669,259
Portfolio Turnover Rate
67%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*,† (% of Total Investments)
image
 [19],[20]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, Western Asset Management Company Ltd. ceased to serve as a subadviser to the Fund.
This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change to the Fund since August 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[2]
† Amount represents less than -0.005%.
[3]
* Does not include derivatives, except purchased options, if any.  
[4]
† Certain categories may represent less than 0.1%.
[5]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[6]
† Amount represents less than -0.005%.
[7]
* Does not include derivatives, except purchased options, if any.  
[8]
† Certain categories may represent less than 0.1%.
[9]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[10]
† Amount represents less than -0.005%.
[11]
* Does not include derivatives, except purchased options, if any.  
[12]
† Certain categories may represent less than 0.1%.
[13]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[14]
† Amount represents less than -0.005%.
[15]
* Does not include derivatives, except purchased options, if any.  
[16]
† Certain categories may represent less than 0.1%.
[17]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[18]
† Amount represents less than -0.005%.
[19]
* Does not include derivatives, except purchased options, if any.  
[20]
† Certain categories may represent less than 0.1%.