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Regulatory Matters - Schedule of Regulatory Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
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PCB Bancorp |  |
Actual |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 325,048 | $ 303,423
Common tier 1 capital (to risk-weighted assets), ratio | 0.1146 | 0.1144
Total capital (to risk-weighted assets), amount | $ 429,113 | $ 404,383
Total capital (to risk-weighted assets), ratio | 0.1513 | 0.1524
Tier 1 capital (to risk-weighted assets), amount | $ 394,189 | $ 372,564
Tier 1 capital (to risk-weighted assets), ratio | 0.1389 | 0.1404
Tier 1 capital (to average assets), amount | $ 394,189 | $ 372,564
Tier 1 capital (to average assets), ratio | 0.1189 | 0.1245
Minimum Capital Requirement |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 127,663 | $ 119,387
Common tier 1 capital (to risk-weighted assets), ratio | 4.50% | 4.50%
Total capital (to risk-weighted assets), amount | $ 226,956 | $ 212,243
Total capital (to risk-weighted assets), ratio | 0.080 | 0.080
Tier 1 capital (to risk-weighted assets), amount | $ 170,217 | $ 159,182
Tier 1 capital (to risk-weighted assets), ratio | 0.060 | 0.060
Tier 1 capital (to average assets), amount | $ 132,582 | $ 119,666
Tier 1 capital (to average assets), ratio | 0.040 | 0.040
PCB Bank |  |
Actual |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 382,620 | $ 363,786
Common tier 1 capital (to risk-weighted assets), ratio | 0.1349 | 0.1372
Total capital (to risk-weighted assets), amount | $ 417,545 | $ 395,606
Total capital (to risk-weighted assets), ratio | 0.1472 | 0.1492
Tier 1 capital (to risk-weighted assets), amount | $ 382,620 | $ 363,786
Tier 1 capital (to risk-weighted assets), ratio | 0.1349 | 0.1372
Tier 1 capital (to average assets), amount | $ 382,620 | $ 363,786
Tier 1 capital (to average assets), ratio | 0.1155 | 0.1216
Minimum Capital Requirement |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 127,616 | $ 119,340
Common tier 1 capital (to risk-weighted assets), ratio | 4.50% | 4.50%
Total capital (to risk-weighted assets), amount | $ 226,873 | $ 212,160
Total capital (to risk-weighted assets), ratio | 0.080 | 0.080
Tier 1 capital (to risk-weighted assets), amount | $ 170,154 | $ 159,120
Tier 1 capital (to risk-weighted assets), ratio | 0.060 | 0.060
Tier 1 capital (to average assets), amount | $ 132,540 | $ 119,636
Tier 1 capital (to average assets), ratio | 0.040 | 0.040
To Be Well Capitalized Under Prompt Corrective Provisions |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 184,334 | $ 172,380
Common tier 1 capital (to risk-weighted assets), ratio | 6.50% | 6.50%
Total capital (to risk-weighted assets), amount | $ 283,591 | $ 265,200
Total capital (to risk-weighted assets), ratio | 0.100 | 0.100
Tier 1 capital (to risk-weighted assets), amount | $ 226,873 | $ 212,160
Tier 1 capital (to risk-weighted assets), ratio | 0.080 | 0.080
Tier 1 capital (to average assets), amount | $ 165,675 | $ 149,545
Tier 1 capital (to average assets), ratio | 0.050 | 0.050

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