Conference fees
| EUR | BGN equivalent | |
| 1. Participation with 1 report - published in MDPI Engineering Proceedings |
360 / 320* | 704.10 / 625.87* |
| 2. Participation with 2 reports - published in MDPI Engineering Proceedings |
510 / 470* | 997.47 / 919.24* |
| 3. Participation with 1 report - published in Proceedings of TU-Sofia (ISSN 2738-8549) |
180 / 85* | 352.05 / 166.25* |
| 4. Participation with 2 reports - published in Proceedings of TU-Sofia (ISSN 2738-8549) |
215 / 120* | 420.50 / 234.70* |
| 5. Participation with 2 reports - one published in MDPI Engineering Proceedings and one in Proceedings of TU-Sofia (ISSN 2738-8549) |
390 / 350* | 762.77 / 684.54* |
| 6. Co-authors and participants without reports1 | 150 | 293.37 |
| 7. Companion of a participant2 | 100 | 195.58 |
| 8. Reports by students and PhD students3 | отстъпка 50% | |
* For the online participants, the papers will be presented via an online video call and broadcast live for all conference participants.
1 Regardless of the number of co-authorships and the publication issue, co-authors pay EUR 150 (BGN 293.37), given that the full publication fee for the respective report is already paid by another co-author. Each author can be a co-author in up to 2 papers for MDPI Engineering Proceedings and 2 for Proceedings of TU-Sofia.
2 A participant companion is a family member who is not a co-author and does not participate in the scientific events of the conference. The fee includes welcome cocktail and official dinner.
3 Discount for papers in which all authors are students or PhD students with age not greater than 35. All co-authors who participate on-site pay the regular co-author fee.
Accoding to Article 15 of the Law on the Introduction of the Euro in the Republic of Bulgaria, the fees are indicated both in EUR and BGN (official exhange rate: 1 EUR 1 = BGN 1.95583).
Bank Accounts
Eurobank Bulgaria AD
BIC: BPBIBGSF
IBAN (EUR): BG98 BPBI 7940 1446 1397 01
Recipient: Technical University of Sofia - Technologies EOOD
VAT (ID) number: BG 130 506 225
Reason: BulTrans-2026 [Author Name]
Please replace [AuthorName] with the name of an author.