The naturalization timeline for applications filed in 2026 in Rotterdam is not fixed, but the IND generally works toward a decision in 9 to 12 months, and some cases take longer. The municipality of Rotterdam arranges the ceremony and forwards paperwork, but the IND makes the legal decision nationally. Your best move is to submit a complete application and react quickly to any follow-up requests.
Naturalization is a national process, not a city one. In the Netherlands, you apply through the IND, and in practice municipalities such as Rotterdam help with forms, document checks, and ceremonies. That means a long waiting list at Rotterdam's desk will not change the national target time. However, mistakes in your file will land your application at the back of the desk while the IND asks for corrections, so the timeline you can actually influence is the preparation time before you submit.
The standard conditions for most adults are at least five years of continuous legal residence, a current residence permit, proof of integration (usually the civic integration exam), and no serious criminal record or unpaid fines. Some residence permits, such as study years, may count only in specific situations, and a gap between permits can break the 5-year chain. If you have any doubt, the safest step is to request a free or low-cost legal consultation with a specialist in Dutch nationality law, or use the official IND cost calculator and eligibility tools. Do not rely on forum posts for eligibility questions because a small detail in your residence history can change the answer.
Practical next steps. First, list every address and residence permit you have held since you arrived, and compare it against the 5 year requirement. Second, gather your passport, birth certificate, proof of address, and integration exam certificate. Foreign documents may need legalisation and translation, and that can take months if you need to reach an embassy abroad. Third, submit your application as early as possible, but never with missing documents on purpose. The IND returns incomplete files more often than it grants a fast decision.
After submission, use your DigiD to check the status in the IND's online tracking tool, and keep the letters or emails from the IND in a folder. When the IND sends a request for more information, the deadline is strict. Missing it can stop the process. If the legal text in the letter is unclear, contact the IND before the deadline; asking a question does not count as missing the deadline.
Finally, when the IND approves the application, Rotterdam will send an invitation to a naturalization ceremony. The ceremony is the last step, and you must attend it within one year of the approval in order to receive your certificate. Local schedules vary, but this part is usually a matter of weeks to a few months. Be patient, but do not be passive: most delays happen when documents are incomplete or a request is ignored.