v3.25.4
Net fee and commission income - Summary of total fees in scope of IFRS 15 Revenues from Contracts with Customers (Details) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Fee and commission income [abstract]      
Total revenue from contracts with customers £ 9,707 £ 9,349 £ 8,569
Other non-contract fee income 172 137 139
Fee and commission income 9,879 9,486 8,708
Fee and commission expense (3,326) (3,215) (3,247)
Net fee and commission income 6,553 6,271 5,461
Transactional      
Fee and commission income [abstract]      
Total revenue from contracts with customers 3,809 3,800 3,692
Advisory      
Fee and commission income [abstract]      
Total revenue from contracts with customers 1,054 1,058 903
Brokerage and execution      
Fee and commission income [abstract]      
Total revenue from contracts with customers 1,978 1,709 1,763
Underwriting and syndication      
Fee and commission income [abstract]      
Total revenue from contracts with customers 2,757 2,688 2,079
Other      
Fee and commission income [abstract]      
Total revenue from contracts with customers 109 94 132
Operating segments | Barclays UK Corporate Bank      
Fee and commission income [abstract]      
Total revenue from contracts with customers 575 551 527
Other non-contract fee income 26 25 28
Fee and commission income 601 576 555
Fee and commission expense (96) (95) (102)
Net fee and commission income 505 481 453
Operating segments | Barclays UK Corporate Bank | Transactional      
Fee and commission income [abstract]      
Total revenue from contracts with customers 462 448 433
Operating segments | Barclays UK Corporate Bank | Advisory      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Operating segments | Barclays UK Corporate Bank | Brokerage and execution      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Operating segments | Barclays UK Corporate Bank | Underwriting and syndication      
Fee and commission income [abstract]      
Total revenue from contracts with customers 102 92 82
Operating segments | Barclays UK Corporate Bank | Other      
Fee and commission income [abstract]      
Total revenue from contracts with customers 11 11 12
Operating segments | Barclays Private Bank and Wealth Management      
Fee and commission income [abstract]      
Total revenue from contracts with customers 535 484 375
Other non-contract fee income 0 0 1
Fee and commission income 535 484 376
Fee and commission expense (40) (38) (34)
Net fee and commission income 495 446 342
Operating segments | Barclays Private Bank and Wealth Management | Transactional      
Fee and commission income [abstract]      
Total revenue from contracts with customers 30 33 32
Operating segments | Barclays Private Bank and Wealth Management | Advisory      
Fee and commission income [abstract]      
Total revenue from contracts with customers 344 319 251
Operating segments | Barclays Private Bank and Wealth Management | Brokerage and execution      
Fee and commission income [abstract]      
Total revenue from contracts with customers 158 129 89
Operating segments | Barclays Private Bank and Wealth Management | Underwriting and syndication      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Operating segments | Barclays Private Bank and Wealth Management | Other      
Fee and commission income [abstract]      
Total revenue from contracts with customers 3 3 3
Operating segments | Barclays Investment Bank      
Fee and commission income [abstract]      
Total revenue from contracts with customers 5,585 5,302 4,707
Other non-contract fee income 146 112 110
Fee and commission income 5,731 5,414 4,817
Fee and commission expense (1,258) (1,127) (1,253)
Net fee and commission income 4,473 4,287 3,564
Operating segments | Barclays Investment Bank | Transactional      
Fee and commission income [abstract]      
Total revenue from contracts with customers 336 336 327
Operating segments | Barclays Investment Bank | Advisory      
Fee and commission income [abstract]      
Total revenue from contracts with customers 710 739 652
Operating segments | Barclays Investment Bank | Brokerage and execution      
Fee and commission income [abstract]      
Total revenue from contracts with customers 1,820 1,580 1,674
Operating segments | Barclays Investment Bank | Underwriting and syndication      
Fee and commission income [abstract]      
Total revenue from contracts with customers 2,655 2,596 1,997
Operating segments | Barclays Investment Bank | Other      
Fee and commission income [abstract]      
Total revenue from contracts with customers 64 51 57
Operating segments | Barclays US Consumer Bank      
Fee and commission income [abstract]      
Total revenue from contracts with customers 2,727 2,661 2,603
Other non-contract fee income 0 0 0
Fee and commission income 2,727 2,661 2,603
Fee and commission expense (1,858) (1,855) (1,765)
Net fee and commission income 869 806 838
Operating segments | Barclays US Consumer Bank | Transactional      
Fee and commission income [abstract]      
Total revenue from contracts with customers 2,727 2,661 2,603
Operating segments | Barclays US Consumer Bank | Advisory      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Operating segments | Barclays US Consumer Bank | Brokerage and execution      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Operating segments | Barclays US Consumer Bank | Underwriting and syndication      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Operating segments | Barclays US Consumer Bank | Other      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Head Office      
Fee and commission income [abstract]      
Total revenue from contracts with customers 285 351 357
Other non-contract fee income 0 0 0
Fee and commission income 285 351 357
Fee and commission expense (74) (100) (93)
Net fee and commission income 211 251 264
Head Office | Transactional      
Fee and commission income [abstract]      
Total revenue from contracts with customers 254 322 297
Head Office | Advisory      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Head Office | Brokerage and execution      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Head Office | Underwriting and syndication      
Fee and commission income [abstract]      
Total revenue from contracts with customers 0 0 0
Head Office | Other      
Fee and commission income [abstract]      
Total revenue from contracts with customers £ 31 £ 29 £ 60