What must be filed within the Texas notice-of-appeal extension window?

Establish the original notice deadline from the actual appeal branch, event and legally applicable adjustments.

Identify the trial court for the notice and the proper appellate court for the extension motion.

Prepare both filings and the reasonable explanation and identifying information required by Rule 10.5(b).

1. Establish the original notice deadline from the actual appeal branch, event and legally applicable adjustments.
2. Exclude the actual triggering event and count every intermediate calendar day under Rule 4.1(a). Do not import the Civil Rules’ short-period exclusion into appellate computation. A signing, rendition, filing or ruling date must be established from its own actual record. Add fifteen days to the independently established original notice deadline. Do not add fifteen days directly to judgment signing or treat the resulting window as an automatic extension.
3. Apply Rule 4.1 and establish the actual clerk calendar.
4. Complete the required act in the correct court.

Rule 4.1(a) moves a final Saturday, Sunday or legal holiday to the next eligible day. Rule 4.1(b) separately extends a filing period when the proper clerk is closed or inaccessible during regular hours on the final day, until the next open and accessible day. Preserve the required proof. The encoded Texas holiday calendar covers 2026 through 2028; it does not know additional local closure or system failure.

Fictitious example

Fictitious facts. The applicable original notice deadline is independently established; both required filings are prepared within the measured window. The established input date is August 2, 2027. No additional closure, order, bankruptcy suspension or unmodeled timetable restart applies.

Fictitious facts with the stated appeal classification and actual event independently established. No additional closure, order, disputed eligibility or unmodeled restart is assumed.

Extension requires two acts and court discretion

Rule 26.3 permits the appellate court to extend time when the notice is filed in the trial court and a Rule 10.5(b) motion is filed in the appellate court within fifteen days after the applicable notice deadline. Neither calculation nor one filing proves an extension was granted.

The motion has specific contents

Rule 10.5(b)(2) requires the filing deadline, facts reasonably explaining the need, trial court, judgment or order date, case number and case style. The general motion provisions remain separately applicable.

The two destinations differ

Rule 26.3(a) specifies filing the notice in the trial court. Rule 26.3(b) specifies filing the extension motion in the appellate court. Preserve both actual filing confirmations.

Trial-court electronic filing is separate

Civil Rule 21(f)(5) supplies the covered trial-court electronic transmission boundary. An appellate clerk’s filing rule does not replace the trial-clerk destination required by Rule 25.1.

• The calculator does not decide appealability, disputed classification, the merits, entitlement to relief or sufficiency of a filing.
• The consolidation date does not establish applicability of every historical amendment. Read the actual governing edition and orders.

• Establish the original notice deadline from the actual appeal branch, event and legally applicable adjustments.
• Identify the trial court for the notice and the proper appellate court for the extension motion.
• Prepare both filings and the reasonable explanation and identifying information required by Rule 10.5(b).
• Rule 26.3 permits the appellate court to extend time when the notice is filed in the trial court and a Rule 10.5(b) motion is filed in the appellate court within fifteen days after the applicable notice deadline. Neither calculation nor one filing proves an extension was granted.
• Rule 10.5(b)(2) requires the filing deadline, facts reasonably explaining the need, trial court, judgment or order date, case number and case style. The general motion provisions remain separately applicable.
• Rule 26.3(a) specifies filing the notice in the trial court. Rule 26.3(b) specifies filing the extension motion in the appellate court. Preserve both actual filing confirmations.
• Civil Rule 21(f)(5) supplies the covered trial-court electronic transmission boundary. An appellate clerk’s filing rule does not replace the trial-clerk destination required by Rule 25.1.
• File the written notice with the trial court clerk under Rule 25.1(a). Include the required court, case, party and judgment information under 25.1(d). Rule 25.1(e) separately requires service on the relevant parties and delivery to each responsible court reporter at or before filing. For covered trial-court electronic filing, Civil Rule 21(f)(5) ordinarily uses transmission to the service provider before midnight in the court time zone, with its specified-time, holiday and leave-order exceptions. Preserve filing and service receipts. Rule 25.1(a) addresses a notice mistakenly filed with the appellate court, but the prescribed destination remains the trial court. Separately file the Rule 10.5(b) extension motion with the appellate clerk. File with the proper appellate clerk. Under Rule 9.2(c)(4), ordinary electronic filing occurs on transmission to the filing party’s service provider before midnight in the court’s time zone, subject to a specified time of day, weekend or holiday transmission and a required leave order. Attorneys in civil cases must electronically file subject to Rule 9.2(c)’s stated exceptions. Preserve confirmation and seek appropriate court relief for technical failure under 9.2(c)(5). Rule 9.5 separately requires timely service on all parties, ordinarily their lead counsel, and proof of service; appellate records outside original proceedings have their stated service exception. A qualifying mailed filing under 9.2(b) requires timely deposit or delivery and receipt within ten days after the filing deadline. Those ten days do not permit late deposit.