During its lifetime, McStas efforts have been supported through several European Union RTD and JRA programmes, plus several instrument development projects for facilities.
| Project | Program type | Funding period |
| XENNI | RTD (EU FP4) | February 1st 1996 - January 31st 2000 |
| Cool Neutrons | RTD (EU FP4) | May 1st 1998 - April 30th 2001 |
| SCANS | RTD (EU FP5) | March 1st 2000 - February 29th 2004 |
| MCNSI | JRA in NMI3 (EU FP6) | 2004 - 2006 |
| MCNSI7 | JRA in NMI3/FP7 (EU FP7) | 2006 - 2008 |
| NMI3-II/FP7 outreach project | JRA in NMI3/FP7 (EU FP7) | 2012 - 2016 |
| ISIS TS2 EU project | Infrastructure project in (EU FP6) | 2006-2009 |
| Instrument simulations for the ESS design update | Danish in-kind project toward the ESS | 2009-2012 |
| Secondment of P Willendrup from DTU for supporting instrument simulations for the ESS | Integral part of the ESS DMSC | 2014-2022 |
| SINE2020 | Part of WP3 and WP8 (EU H2020) | 2016 - 2019 |