Patent Filing in Bulgaria
File your PCT national phase application in Bulgaria with the Patent Office of the Republic of Bulgaria through AnalystIP, within 31 months from the priority date. Every requirement below is taken from the WIPO PCT Applicant's Guide and kept up to date by our team.
When is your national phase deadline in Bulgaria?
Enter the earliest priority date of your PCT application (or the international filing date if there is no priority).
Patent filing in Bulgaria: key facts
Reinstatement of rights permitted under the 'due care' criterion (Rule 49.6): written reasoned request within one month after the cause of delay ceases and no…
Filing fee reduced by 50% for patents and utility models if the applicant is the inventor, a State educational institution, an academic research organization…
20 years from the international filing date
Official fees for patent filing in Bulgaria
Filing in several countries? Compare fees with other countries →
Standard official fees (general)
From the WIPO PCT Applicant's Guide, updated Applicable as from June 26, 2026. Amounts in EUR. Your exact fees depend on your application: use the calculator above.
| Fee | Amount | Notes |
|---|---|---|
| Patents: Filing fee | EUR 20.45 | Due within the Article 22 or 39(1) time limit |
| Patents: Publication fee | EUR 35.79 | |
| Utility models: Filing fee | EUR 20.45 | Due within the Article 22 or 39(1) time limit |
Fee reductions: Filing fee reduced by 50% for patents and utility models if the applicant is the inventor, a State educational institution, an academic research organization, a budgetary organization, or a small or medium-sized enterprise. Patent fee reduced by 50% if the applicant declares readiness to license when entering the national phase.
National phase entry requirements
Time limit
31 months from the priority date (Article 22(3) and Article 39(1)(b); same for Chapter I and II)
Also available through the European Patent Office (31 months).
Translation
Under Article 22: description, claims (if amended, both as originally filed and as amended, plus any Article 19 statement), text matter of drawings, abstract. Under Article 39(1): description, claims, text matter of drawings, abstract; if amended, both as originally filed and as amended by the IPER annexes. If not filed within the time limit, the Office invites a complete translation within three months of the invitation.
Late entry and reinstatement
Reinstatement of rights permitted under the 'due care' criterion (Rule 49.6): written reasoned request within one month after the cause of delay ceases and no later than three months after the missed deadline
Agent and power of attorney
Required if the applicant is not resident in Bulgaria; any attorney or patent agent registered to practice before the Office may act
Special requirements of the office
- Instrument of assignment of the priority right if applicants are not identical (may be satisfied by a Rule 4.17 declaration)
- Instrument of assignment of the international application if the applicant changed after the international filing date
- Declaration concerning inventorship (may be satisfied by a Rule 4.17 declaration)
- Appointment of an agent if the applicant is not resident in Bulgaria
- Translation of the international application furnished in three copies
Other information
- Examination, grant, annual and other fees are listed in Annex BG.I
- Inventor's name and nationality must be stated; if not given within the time limit, the Office invites it within three months
- Claims fee based on claims at start of national phase
- Application published in Bulgarian 18 months after filing/priority date
- Fees payable in euro by bank transfer or at the Office
- Utility model may be sought instead of or in addition to a patent; conversion possible up to grant
Source: WIPO PCT Applicant's Guide, national chapter, updated Applicable as from June 26, 2026.
Patent filing in Bulgaria: questions
What is the deadline for PCT national phase entry in Bulgaria?
31 months from the earliest priority date.
Can I enter the national phase in Bulgaria after the deadline?
Reinstatement of rights permitted under the 'due care' criterion (Rule 49.6): written reasoned request within one month after the cause of delay ceases and no later than three months after the missed deadline
In which language must the application be filed in Bulgaria?
Bulgarian. Under Article 22: description, claims (if amended, both as originally filed and as amended, plus any Article 19 statement), text matter of drawings, abstract. Under Article 39(1): description, claims, text matter of drawings, abstract; if amended, both as originally filed and as amended by the IPER annexes.
Do I need a local patent attorney in Bulgaria?
Required if the applicant is not resident in Bulgaria; any attorney or patent agent registered to practice before the Office may act
Are there official fee reductions in Bulgaria?
Filing fee reduced by 50% for patents and utility models if the applicant is the inventor, a State educational institution, an academic research organization, a budgetary organization, or a small or medium-sized enterprise. Patent fee reduced by 50% if the applicant declares readiness to license when entering the national phase.
How much does patent filing in Bulgaria cost?
The cost is the official fees of the patent office plus professional fees. The standard official fees from WIPO are listed on this page; the calculator works out the exact official fees for your application (pages, claims, applicant type) after a quick email check, and our team sends a full quote on request.
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