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 Short Duration High Income Fund
Class Name Class A
Trading Symbol SHIAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Short Duration High 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.
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
$98
0.95%
[1]
Expenses Paid, Amount $ 98
Expense Ratio, Percent 0.95%
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 Short Duration High Income Fund returned 5.46%. The Fund compares its performance to the Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index, which returned 4.96% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Issuer selection within multiple sectors, including technology, transportation and communications.
↑
Opportunistic allocation to structured products.
↑
Opportunistic allocation to emerging markets.
Top detractors from performance:
↓
Industry allocation, driven mainly by an overweight to transportation and an underweight to energy.
↓
Quality positioning contributed to relative performance, but the effect of credit derivatives resulted in an overall negative contribution during the reporting period.
↓
Issuer selection within multiple sectors, including real estate investment trusts (REITs), basic industry and banking.
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
5.46
4.50
5.27
Class A (with sales charge)
3.11
4.04
5.03
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index
4.96
5.02
5.56
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.
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 $ 581,787,132
Holdings Count | $ / shares 411
Advisory Fees Paid, Amount $ 2,967,308
Investment Company Portfolio Turnover 61.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$581,787,132
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
411
Total Management Fee Paid
$2,967,308
Portfolio Turnover Rate
61%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [2]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Western Asset Short Duration High Income Fund
Class Name Class C
Trading Symbol LWHIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Short Duration High 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.
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
$169
1.65%
[3]
Expenses Paid, Amount $ 169
Expense Ratio, Percent 1.65%
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 Short Duration High Income Fund returned 4.51%. The Fund compares its performance to the Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index, which returned 4.96% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Issuer selection within multiple sectors, including technology, transportation and communications.
↑
Opportunistic allocation to structured products.
↑
Opportunistic allocation to emerging markets.
Top detractors from performance:
↓
Industry allocation, driven mainly by an overweight to transportation and an underweight to energy.
↓
Quality positioning contributed to relative performance, but the effect of credit derivatives resulted in an overall negative contribution during the reporting period.
↓
Issuer selection within multiple sectors, including real estate investment trusts (REITs), basic industry and banking.
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
4.51
3.76
4.53
Class C (with sales charge)
3.53
3.76
4.53
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index
4.96
5.02
5.56
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.
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 $ 581,787,132
Holdings Count | $ / shares 411
Advisory Fees Paid, Amount $ 2,967,308
Investment Company Portfolio Turnover 61.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$581,787,132
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
411
Total Management Fee Paid
$2,967,308
Portfolio Turnover Rate
61%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [4]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C1  
Shareholder Report [Line Items]  
Fund Name Western Asset Short Duration High Income Fund
Class Name Class C1
Trading Symbol SHICX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Short Duration High 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.
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
$169
1.65%
[5]
Expenses Paid, Amount $ 169
Expense Ratio, Percent 1.65%
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 Short Duration High Income Fund returned 4.51%. The Fund compares its performance to the Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index, which returned 4.96% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Issuer selection within multiple sectors, including technology, transportation and communications.
↑
Opportunistic allocation to structured products.
↑
Opportunistic allocation to emerging markets.
Top detractors from performance:
↓
Industry allocation, driven mainly by an overweight to transportation and an underweight to energy.
↓
Quality positioning contributed to relative performance, but the effect of credit derivatives resulted in an overall negative contribution during the reporting period.
↓
Issuer selection within multiple sectors, including real estate investment trusts (REITs), basic industry and banking.
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
4.51
3.96
4.79
Class C1 (with sales charge)
3.53
3.96
4.79
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index
4.96
5.02
5.56
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.
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 $ 581,787,132
Holdings Count | $ / shares 411
Advisory Fees Paid, Amount $ 2,967,308
Investment Company Portfolio Turnover 61.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$581,787,132
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
411
Total Management Fee Paid
$2,967,308
Portfolio Turnover Rate
61%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [6]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name Western Asset Short Duration High Income Fund
Class Name Class R
Trading Symbol LWSRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Short Duration High 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.
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 R
$143
1.40%
[7]
Expenses Paid, Amount $ 143
Expense Ratio, Percent 1.40%
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 R shares of Western Asset Short Duration High Income Fund returned 4.98%. The Fund compares its performance to the Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index, which returned 4.96% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Issuer selection within multiple sectors, including technology, transportation and communications.
↑
Opportunistic allocation to structured products.
↑
Opportunistic allocation to emerging markets.
Top detractors from performance:
↓
Industry allocation, driven mainly by an overweight to transportation and an underweight to energy.
↓
Quality positioning contributed to relative performance, but the effect of credit derivatives resulted in an overall negative contribution during the reporting period.
↓
Issuer selection within multiple sectors, including real estate investment trusts (REITs), basic industry and banking.
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 R
4.98
4.03
4.86
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index
4.96
5.02
5.56
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.
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 $ 581,787,132
Holdings Count | $ / shares 411
Advisory Fees Paid, Amount $ 2,967,308
Investment Company Portfolio Turnover 61.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$581,787,132
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
411
Total Management Fee Paid
$2,967,308
Portfolio Turnover Rate
61%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [8]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class I  
Shareholder Report [Line Items]  
Fund Name Western Asset Short Duration High Income Fund
Class Name Class I
Trading Symbol SHIYX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Western Asset Short Duration High 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.
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
$72
0.70%
[9]
Expenses Paid, Amount $ 72
Expense Ratio, Percent 0.70%
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 Short Duration High Income Fund returned 5.72%. The Fund compares its performance to the Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index, which returned 4.96% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Issuer selection within multiple sectors, including technology, transportation and communications.
↑
Opportunistic allocation to structured products.
↑
Opportunistic allocation to emerging markets.
Top detractors from performance:
↓
Industry allocation, driven mainly by an overweight to transportation and an underweight to energy.
↓
Quality positioning contributed to relative performance, but the effect of credit derivatives resulted in an overall negative contribution during the reporting period.
↓
Issuer selection within multiple sectors, including real estate investment trusts (REITs), basic industry and banking.
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
5.72
4.77
5.55
Bloomberg U.S. Aggregate Index
2.71
-0.40
1.35
Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Constrained Index
4.96
5.02
5.56
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.
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 $ 581,787,132
Holdings Count | $ / shares 411
Advisory Fees Paid, Amount $ 2,967,308
Investment Company Portfolio Turnover 61.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of July 31, 2026)
Total Net Assets
$581,787,132
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
411
Total Management Fee Paid
$2,967,308
Portfolio Turnover Rate
61%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of July 31, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [10]
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]
* Does not include derivatives, except purchased options, if any.  
[3]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[4]
* Does not include derivatives, except purchased options, if any.  
[5]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[6]
* Does not include derivatives, except purchased options, if any.  
[7]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[8]
* Does not include derivatives, except purchased options, if any.  
[9]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[10]
* Does not include derivatives, except purchased options, if any.