| Date | Player | From | To | Amount |
|---|---|---|---|---|
| 17 Aug 18 | Stephy Mavididi | Undisclosed | ||
| 17 Aug 18 | Undisclosed | |||
| 17 Aug 18 | Loan | |||
| 17 Aug 18 | Stephy Mavididi | Undisclosed | ||
| 17 Aug 18 | Loan | |||
| 12 Aug 18 | Stefano Sturaro | Loan | ||
| 10 Aug 18 | Andrea Favilli | Loan | ||
| 08 Aug 18 | Marko Pjaca | Loan | ||
| 02 Aug 18 | Leonardo Bonucci | 35000000 | ||
| 02 Aug 18 | Gonzalo Higuaín | Loan | ||
| 02 Aug 18 | Mattia Caldara | 35000000 | ||
| 01 Aug 18 | Idrissa Touré | Loan | ||
| 01 Aug 18 | Idrissa Touré | Loan | ||
| 27 Jul 18 | Pablo Moreno Chulilla | Undisclosed | ||
| 27 Jul 18 | Pablo Moreno Chulilla | Undisclosed | ||
| 26 Jul 18 | 20,000,000 | |||
| 16 Jul 18 | Cristiano Ronaldo | 105250000 | ||
| 16 Jul 18 | Cristiano Ronaldo | 105250000 | ||
| 12 Jul 18 | Alberto Cerri | Loan | ||
| 06 Jul 18 | Gianluigi Buffon | Free | ||
| 06 Jul 18 | Gianluigi Buffon | Free | ||
| 01 Jul 18 | Emre Can | Free | ||
| 01 Jul 18 | Kwadwo Asamoah | Free | ||
| 01 Jul 18 | Stephan Lichtsteiner | Free | ||
| 01 Jul 18 | Emre Can | Free | ||
| 01 Jul 18 | Stephan Lichtsteiner | Free | ||
| 27 Jun 18 | João Cancelo | 40400000 | ||
| 27 Jun 18 | João Cancelo | 40400000 | ||
| 08 Jun 18 | Mattia Perin | 12000000 | ||
| 08 Jun 18 | Douglas Costa | 40000000 | ||
| 08 Jun 18 | Douglas Costa | 40000000 | ||
| 04 Jan 18 | Marko Pjaca | Loan | ||
| 04 Jan 18 | Marko Pjaca | Loan |