| Cover | Mar. 29, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 29, 2024 |
| Entity File Number | 814-01334 |
| Entity Registrant Name | PALMER SQUARE CAPITAL BDC INC. |
| Entity Central Index Key | 0001794776 |
| Entity Tax Identification Number | 84-3665200 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 1900 Shawnee Mission Parkway |
| Entity Address, Address Line Two | Suite 315 |
| Entity Address, City or Town | Mission Woods |
| Entity Address, State or Province | KS |
| Entity Address, Postal Zip Code | 66205 |
| City Area Code | 816 |
| Local Phone Number | 994-3200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | PSBD |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
