Quick answer
For a European Postdoctoral Fellowship, the researcher normally must not have resided or carried out their main activity in the country of the beneficiary for more than 12 months in the 36 months immediately before the call deadline. For a Global Postdoctoral Fellowship, the same mobility logic applies to the host organisation for the outgoing phase.
Applicants also normally need a PhD by the deadline and must remain within the MSCA Postdoctoral Fellowship research-experience limit, currently a maximum of eight years from the PhD award date after applying the exclusions allowed by the rules.
Official source: MSCA Postdoctoral Fellowships.
Eligibility should be solved before proposal writing
A surprising amount of proposal effort is wasted because applicants treat mobility as something to confirm later.
Check it first.
Create a dated timeline covering the 36 months immediately before the call deadline and record where the researcher:
- lived;
- worked;
- studied;
- carried out their main activity;
- had short stays that may or may not count under the detailed rules.
The question is not nationality. It is where the relevant activity took place during the reference period.
The 12-in-36 test
The practical calculation is simple in concept:
- identify the exact call deadline;
- count backwards 36 months;
- identify periods of residence or main activity in the destination country;
- calculate whether the total exceeds 12 months;
- check the current call documents for any applicable exceptions or special cases.
Do not rely on approximate statements such as “I moved recently” or “I was mostly abroad”. Eligibility needs a defensible timeline.
The eight-year research-experience limit is a separate test
The Postdoctoral Fellowship rules also set a maximum of eight years of research experience from the PhD award date, with specified periods that do not count towards the maximum.
The official MSCA page notes that years of experience outside research and career breaks are excluded, as are certain years of research in third countries for eligible researchers reintegrating to Europe. The detailed calculation should be done using the current guidance and self-assessment tool.
Mobility eligibility and research-experience eligibility are separate questions. Passing one does not imply passing the other.
Do not design the host around a technicality
Eligibility is binary. Host choice is strategic.
A host that satisfies the mobility rule but adds little to the project is rarely a strong proposal choice. Once eligibility is confirmed, the proposal still needs to answer:
- What capability does the host provide?
- Why is the supervisor appropriate?
- What will the researcher learn there?
- What knowledge will the researcher bring?
- What does the host enable that the current environment does not?
That is the difference between being eligible and having a convincing fellowship design.
Common eligibility mistakes
Counting from the wrong date
Use the actual call deadline and the exact reference period in the current call documents.
Treating nationality as mobility
MSCA mobility is based on residence/main activity, not simply citizenship.
Ignoring mixed periods
Research visits, employment changes, remote work and overlapping affiliations can make the timeline less obvious. Document them explicitly.
Confusing PhD defence and award dates
MSCA documents distinguish between having successfully defended a doctoral thesis for eligibility at deadline and the PhD award date used for parts of the research-experience calculation. Use the current wording carefully.
Starting the proposal before resolving eligibility
If eligibility is uncertain, resolve it with the official documents or the relevant National Contact Point before investing heavily in drafting.
A practical eligibility worksheet
Before starting the proposal, prepare a one-page record containing:
Researcher: full name
Target action: European PF or Global PF
Call deadline: exact date
Destination beneficiary / outgoing host: organisation and country
36-month reference period: start date to deadline
Time in destination country: itemised periods
Total counted months: calculated total
PhD defence date: date
PhD award date: date
Research-experience calculation: years/months
Excluded periods: evidence and basis
Eligibility source checked: Work Programme / Guide / official tool
This creates a record the researcher and host can both verify.
Where the mobility rule fits into proposal strategy
Mobility is an eligibility condition. The proposal then needs to make the mobility scientifically and professionally meaningful.
The strongest applications explain why moving to this particular environment changes the researcher's trajectory. The mobility rule gets the applicant through the door; the host-project-researcher fit helps make the application competitive.
Read the full MSCA Postdoctoral Fellowship guide.
Need a second eligibility check?
Arvacore can review the eligibility logic and then focus on the higher-value question: whether the proposed host, project and career-development plan form a coherent MSCA application.
Explore MSCA proposal support or request a fit check.
Independent guidance. Eligibility should always be confirmed against the current MSCA Work Programme, call page, Guide for Applicants and official tools.