A preliminary investigation before a public prosecutor typically takes about two to three months from a complete filing to resolution — sixty (60) calendar days is the standard deadline for the investigating prosecutor to resolve the case, extendible by up to thirty (30) more days for complex or capital cases, plus additional days for internal review before the resolution is released. Simple cases handled through the summary or expedited tracks can move faster.
A preliminary investigation before a city or provincial prosecutor is required for offenses punishable by at least six (6) years and one (1) day of imprisonment, and it rarely moves quickly. The investigating prosecutor has sixty (60) calendar days from the date the case is assigned to resolve it, extendible by another thirty (30) days for capital offenses, complex cases, counter-charges, consolidated complaints, or a change in the assigned prosecutor. Add the internal steps that follow — transmittal to the head of office, review, and promulgation — and a straightforward complaint can realistically take about two months from a complete filing to resolution, while a contested or complicated one can stretch past three months even before any motion for reconsideration is filed.
Which Rules Govern Preliminary Investigation Today
For decades, preliminary investigation before prosecutors was governed by Rule 112 of the Rules of Court. Since July 31, 2024, the procedure before public prosecutors nationwide has been governed by the 2024 Department of Justice-National Prosecution Service (DOJ-NPS) Rules on Preliminary Investigations and Inquest Proceedings, issued under DOJ Department Circular No. 015, Series of 2024. The Supreme Court has recognized that the affected provisions of Rule 112 are superseded by these DOJ-NPS Rules for preliminary investigations conducted at the prosecutor’s office level, so the timelines below reflect the current DOJ-NPS framework rather than the older Rule 112 schedule many practitioners still remember. One notable change worth knowing: the threshold for when a preliminary investigation is even required moved to offenses punishable by at least six (6) years and one (1) day, a higher bar than the four-years-two-months-and-one-day threshold used under the old rule.
Step-by-Step: How a Preliminary Investigation Unfolds
- 1. Filing of the complaint-affidavit. The complainant files a complaint-affidavit with supporting evidence at the Office of the City or Provincial Prosecutor, together with the required Investigation Data Form.
- 2. Docketing and assignment. The complaint is docketed and assigned to an investigating prosecutor once the record is complete.
- 3. Subpoena to the respondent. The investigating prosecutor issues a subpoena within five (5) calendar days of receiving the complete record, attaching the complaint-affidavit and evidence, and setting a submission date that is not more than thirty (30) days from the prosecutor’s receipt of the complaint.
- 4. Counter-affidavit. The respondent has at least ten (10) days from receipt of the subpoena to file a counter-affidavit and countervailing evidence.
- 5. Clarificatory hearing, if needed. If the prosecutor believes facts or issues need clarification, a hearing may be set within ten (10) calendar days after the counter-affidavit is submitted. This step is optional and used only when the written submissions leave real gaps.
- 6. Resolution. The investigating prosecutor must resolve the case — decide whether probable cause exists to charge the respondent in court — within sixty (60) calendar days from the date of assignment, extendible by up to thirty (30) additional days in capital offenses, complex cases, cases with counter-charges, consolidated complaints, or where the case is reassigned.
- 7. Internal review and promulgation. The resolution is transmitted to the head of the prosecution office within five (5) days, who must act on it within ten (10) days of receipt; the approved resolution is then promulgated within five (5) days.
- 8. Filing in court, or dismissal. If probable cause is found, an Information is filed in the proper trial court. If not, the complaint is dismissed, subject to the complainant’s remedies described below.
Faster and Slower Tracks
Not every complaint goes through the full regular process. Cases that qualify for summary investigation — generally less complex matters where the facts are largely undisputed or the evidence is straightforward — are meant to be resolved promptly upon receipt of the complete record, without waiting out the full sixty-day clock of a regular preliminary investigation. There is also an expedited preliminary investigation track for qualifying cases, which compresses the counter-affidavit period to a shorter window and moves toward resolution faster than the regular track. Which track applies is determined by the investigating prosecutor based on the nature of the offense and the state of the evidence, so two cases that look similar on paper can move at very different speeds.
If the Respondent Was Arrested Without a Warrant
Preliminary investigation is different from inquest. When a person is arrested without a warrant, the arresting officer brings the case to the prosecutor for inquest rather than a full preliminary investigation, and the inquest prosecutor is expected to resolve whether to file charges within the day, with transmittal to the head of office on the next working day. A person validly arrested without a warrant may ask in writing for a regular preliminary investigation instead of an inquest, but doing so ordinarily means remaining in custody, or posting bail if the offense is bailable, while the longer process runs its course.
What Happens if the Prosecutor Misses the Deadline
The sixty- or ninety-day resolution period is a rule of procedure, and prosecutors are expected to comply with it, but a delay beyond the deadline does not automatically dismiss the complaint or bar the filing of an Information. In practice, backlogged prosecution offices sometimes exceed these timeframes, particularly for complex financial, cyber, or multi-respondent cases. A party facing unreasonable delay can follow up in writing with the head of the prosecution office, and in extreme cases inaction may itself become the subject of a separate remedy, but there is no automatic dismissal simply because the sixty- or ninety-day mark has passed.
After the Resolution: Reconsideration and Appeal
A party unhappy with the resolution — whether the complainant whose case was dismissed or the respondent who was found chargeable — may file a motion for reconsideration with the same prosecution office within fifteen (15) days from receipt of the resolution. The motion is assigned to a prosecutor within three (3) days and should be resolved within thirty (30) days from assignment. Beyond reconsideration at the same office, a petition for review to the Department of Justice is generally available as a separate remedy, though its own timeline runs independently of the preliminary investigation clock described above.
Why the Process Takes as Long as It Does
Much of the length comes from how many hands touch a single case file. Between the initial docketing, the subpoena and waiting periods built in for the respondent’s defense, an optional clarificatory hearing, the investigating prosecutor’s own sixty-day clock, and the layered review by the head of office before anything is promulgated, a case that looks simple on the facts can still take the full stretch simply because each step has its own built-in waiting period. Prosecutorial caseloads add another layer — an investigating prosecutor typically carries many cases at once, so the sixty-day period is a ceiling on how long resolution should take, not a guarantee that a particular case will be worked on continuously from day one.
Practical Timeline to Expect
Putting the pieces together, a complainant or respondent in an uncomplicated case should reasonably expect a resolution within about two to three months of a complete filing — sixty days for the investigation itself, plus roughly two to three weeks for transmittal, review, and promulgation. Complex, multi-respondent, or capital cases can extend well past three months once the thirty-day extension is used, and a motion for reconsideration can add another one to two months on top of that. Cases handled through summary or expedited tracks move faster, but the exact pace still depends on how quickly the parties submit their affidavits and how heavy the prosecutor’s caseload is.
What Complainants and Respondents Can Do to Avoid Adding Delay
Because so much of the timeline is triggered by the completeness of what is filed, the single biggest thing either side controls is not giving the office a reason to pause the clock. A complaint-affidavit that already attaches every relevant document, clearly identifies each respondent, and includes the required Investigation Data Form is less likely to be returned for completion — and the sixty-day period only starts once the record is complete, so an incomplete filing effectively delays the whole process before it even begins. On the respondent’s side, filing the counter-affidavit within the period given, rather than waiting until the last possible day or requesting repeated extensions, keeps the case on the track it was assigned to rather than pushing it toward the discretionary extension reserved for complex matters. Keeping a personal log of each date — when the subpoena was received, when documents were submitted, when a resolution should reasonably be expected — also makes it far easier to spot an actual delay worth raising with the head of office, instead of guessing at where the case currently stands.
Frequently Asked Questions
How long does preliminary investigation take in the Philippines? The investigating prosecutor has sixty (60) calendar days from assignment to resolve a case, extendible by thirty (30) more days for complex or capital cases, so a resolution typically lands within two to three months after a complete filing, plus a few more weeks for internal review before it is released.
What offenses require a preliminary investigation? A preliminary investigation is required for offenses punishable by at least six (6) years and one (1) day of imprisonment; lesser offenses generally proceed through a different, shorter process rather than the full sixty-day preliminary investigation.
What if I was arrested without a warrant — do I still go through preliminary investigation? You go through inquest instead, which the prosecutor must act on within the day, though you may ask in writing for a regular preliminary investigation, usually while remaining in custody or on bail.
Can I still do something if the prosecutor’s resolution goes against me? Yes — you can file a motion for reconsideration with the same office within fifteen (15) days of receiving the resolution, and a petition for review to the Department of Justice is generally available as a further remedy.
This commentary is for general informational purposes only and does not constitute legal advice. For guidance specific to your situation, please consult a licensed attorney.
If you have questions about your rights or options under Philippine law, our firm is available to assist. You may reach us via Viber or WhatsApp, call us at 0995 433 5550, or send an email to vivasnobles@gmail.com. We look forward to hearing from you.