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Regulatory Matters - Schedule of Regulatory Capital Amounts and Ratios (Details) $ in Thousands | Jun. 30, 2026 USD ($) | Dec. 31, 2025 USD ($)
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PCB Bancorp |  |
Actual |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 336,642 | $ 325,048
Common tier 1 capital (to risk-weighted assets), ratio | 0.1141 | 0.1146
Total capital (to risk-weighted assets), amount | $ 442,042 | $ 429,113
Total capital (to risk-weighted assets), ratio | 0.1498 | 0.1513
Tier 1 capital (to risk-weighted assets), amount | $ 405,783 | $ 394,189
Tier 1 capital (to risk-weighted assets), ratio | 0.1375 | 0.1389
Tier 1 capital (to average assets), amount | $ 405,783 | $ 394,189
Tier 1 capital (to average assets), ratio | 0.1189 | 0.1189
Minimum Capital Adequacy Requirement |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 132,770 | $ 127,663
Common tier 1 capital (to risk-weighted assets), ratio | 4.50% | 4.50%
Total capital (to risk-weighted assets), amount | $ 236,035 | $ 226,956
Total capital (to risk-weighted assets), ratio | 0.080 | 0.080
Tier 1 capital (to risk-weighted assets), amount | $ 177,026 | $ 170,217
Tier 1 capital (to risk-weighted assets), ratio | 0.060 | 0.060
Tier 1 capital (to average assets), amount | $ 136,460 | $ 132,582
Tier 1 capital (to average assets), ratio | 0.040 | 0.040
PCB Bank |  |
Actual |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 393,709 | $ 382,620
Common tier 1 capital (to risk-weighted assets), ratio | 0.1335 | 0.1349
Total capital (to risk-weighted assets), amount | $ 429,968 | $ 417,545
Total capital (to risk-weighted assets), ratio | 0.1458 | 0.1472
Tier 1 capital (to risk-weighted assets), amount | $ 393,709 | $ 382,620
Tier 1 capital (to risk-weighted assets), ratio | 0.1335 | 0.1349
Tier 1 capital (to average assets), amount | $ 393,709 | $ 382,620
Tier 1 capital (to average assets), ratio | 0.1154 | 0.1155
Minimum Capital Adequacy Requirement |  |
Common tier 1 capital (to risk-weighted assets), amount | $ 132,722 | $ 127,616
Common tier 1 capital (to risk-weighted assets), ratio | 4.50% | 4.50%
Total capital (to risk-weighted assets), amount | $ 235,950 | $ 226,873
Total capital (to risk-weighted assets), ratio | 0.080 | 0.080
Tier 1 capital (to risk-weighted assets), amount | $ 176,963 | $ 170,154
Tier 1 capital (to risk-weighted assets), ratio | 0.060 | 0.060
Tier 1 capital (to average assets), amount | $ 136,418 | $ 132,540
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 | $ 191,710 | $ 184,334
Common tier 1 capital (to risk-weighted assets), ratio | 6.50% | 6.50%
Total capital (to risk-weighted assets), amount | $ 294,938 | $ 283,591
Total capital (to risk-weighted assets), ratio | 0.100 | 0.100
Tier 1 capital (to risk-weighted assets), amount | $ 235,950 | $ 226,873
Tier 1 capital (to risk-weighted assets), ratio | 0.080 | 0.080
Tier 1 capital (to average assets), amount | $ 170,522 | $ 165,675
Tier 1 capital (to average assets), ratio | 0.050 | 0.050

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