# Inter Weave – Frs-Fnrs (Belgium)

**Funder:** Fonds National de la Recherche (FNR)
**Consortium:** Required — bilateral (LU + BE)
**Frequency:** Annual
**Next round:** 2026-05
**Eligible countries:** LU
**Official call:** https://www.fnr.lu/funding-instruments/inter/
**Last verified:** 3 July 2026

## Eligibility & scope

WEAVE bilateral collaboration between Luxembourg and Belgium (FRS-FNRS). Luxembourg PI submits to FNR INTER; Belgian partner submits to FRS-FNRS. Higher research effort may be abroad. Max 1 proposal per LU-PI per agency per year. Luxembourg public research institutions eligible.

## Summary

Inter Weave, FRS-FNRS funds bilateral research collaborations between Luxembourg and Belgium, with a Luxembourg principal investigator submitting to FNR INTER and a Belgian partner submitting to FRS-FNRS in parallel. This call is designed to strengthen research partnerships across borders, with funding managed through each country's national research council. Researchers may allocate effort primarily to the foreign partner institution if justified scientifically.

## Who should apply

- Luxembourg principal investigators based at public research institutions
- Belgian research partners with complementary expertise and institutional backing
- Teams with a clear scientific rationale for transnational collaboration
- Researchers planning to submit one proposal per calendar year per funding agency

## Key dates

- Application deadline May or June 2026 (verify exact dates on FNR and FRS-FNRS websites)
- Bilateral submission required: Luxembourg PI submits to FNR INTER, Belgian partner submits to FRS-FNRS
- Annual call with next round expected May 2026

## Tips for applicants

- Coordinate timelines carefully: both Luxembourg and Belgian applications must be submitted and evaluated in sync, misalignment can derail funding approval on one side.
- Demonstrate scientific complementarity explicitly; the panel assesses whether the bilateral structure adds value or merely divides a single project.
- Budget allocation across borders must be clearly justified; if higher effort sits abroad, explain the methodological necessity in both submissions.

## Frequently asked questions

### What is Inter Weave, FRS-FNRS?

Inter Weave is a bilateral research collaboration call between Luxembourg and Belgium, requiring coordinated submissions from a Luxembourg PI to FNR INTER and a Belgian partner to FRS-FNRS.

### Who can be the principal investigator on an Inter Weave, FRS-FNRS project?

The principal investigator must be based at a Luxembourg public research institution and submit to FNR INTER; a Belgian partner with institutional affiliation submits to FRS-FNRS in parallel.

### Can I do most of my research outside Luxembourg on this call?

Yes, if scientifically justified, higher research effort may be conducted abroad; document the rationale in your proposal.

### How many proposals can I submit per year?

Maximum one proposal per Luxembourg PI per funding agency per calendar year.

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Source: [The Great Grantsby](https://grantsby.eu/grants/fnr-luxembourg-inter-weave-frs-fnrs-belgium-2026) — EU grant monitoring for academic researchers. Always verify details on the funder's website before applying.

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