Material and Substantial Change Required Under Section 156.401(a-1) | In the Interest of S.W.R. and H.G.R. (2026)

In the Interest of S.W.R. and H.G.R., Children, 05-24-01237-CV, June 22, 2026.

On appeal from 256th Judicial District Court, Dallas County, Texas

Synopsis

When an agreed child-support order departs from the Chapter 154 guidelines, section 156.401(a-1) controls any later modification request and requires proof of a material and substantial change in the circumstances of the child or a person affected by the order. Before the three-year threshold in section 156.401(a)(2) is satisfied, a movant cannot obtain modification merely by showing the agreed support amount does not match the guideline calculation.

Relevance to Family Law

This opinion matters directly to Texas family-law litigators handling post-divorce modification practice, especially where the original decree incorporated a mediated or negotiated child-support amount above or below guideline support. The case reinforces that agreed deviations from Chapter 154 carry consequences: if the movant seeks modification before the three-year benchmark, the case rises or falls on evidence of a material and substantial change, not on a recalculation of guideline support alone. Strategically, this affects decree drafting, modification pleading, summary-judgment practice, and the evidentiary development of support claims in divorce and SAPCR litigation.

Case Summary

Fact Summary

The parents divorced in August 2020 under an agreed final decree that memorialized a mediated settlement agreement. The decree required Father to pay $2,300 per month in child support, later stepping down to $2,000 upon specified events affecting one of the children, plus $496.06 per month for 100% of the children’s health, dental, and vision insurance.

In February 2023, Father filed a petition to modify the parent-child relationship, seeking changes to conservatorship, possession, and child support. As to support, he alleged both that circumstances had materially and substantially changed and that the agreed support amount was not in substantial compliance with Chapter 154 of the Family Code.

Mother moved for summary judgment on the ground that there had been no material and substantial change in circumstances. The trial court granted the motion and dismissed Father’s claims with prejudice. On appeal, Father argued the trial court should have considered whether the agreed child-support obligation complied with the statutory guidelines and further contended the court granted relief broader than Mother requested.

Issues Decided

Whether a parent may modify an agreed child-support order that differs from the Chapter 154 guidelines, before the three-year mark, without proving a material and substantial change in circumstances.
Whether section 156.401(a-1), rather than section 156.401(a)(2), governs modification of an agreed support order that departs from guideline support.
Whether the trial court improperly granted summary judgment without addressing Father’s contention that the existing support order was not in substantial compliance with the statutory guidelines.
Whether Father’s failure to challenge the no-material-change basis for summary judgment was fatal on appeal.

Rules Applied

The Dallas Court of Appeals focused on Texas Family Code section 156.401. Two statutory pathways were material.

Under Texas Family Code section 156.401(a)(2), a support order may be modified if:
at least three years have elapsed since rendition or last modification, and
the monthly support amount differs by either 20% or $100 from the amount that would be awarded under the guidelines.
Under Texas Family Code section 156.401(a-1), when the parties agreed to a child-support amount that differs from the amount that would have been awarded under the Chapter 154 guidelines, the order may be modified only if the circumstances of the child or a person affected by the order have materially and substantially changed since rendition.

The court also relied on ordinary summary-judgment and appellate-preservation principles. Once Mother moved for summary judgment on the ground that no material and substantial change existed, Father needed either to raise a fact issue in response or challenge that ground effectively on appeal. His failure to do so left the trial court’s dispositive rationale intact.

Application

The opinion is a clean statutory sequencing case. Father attempted to frame his modification request around the proposition that the agreed support amount was outside Chapter 154’s guideline framework. But the court treated that proposition as insufficient by itself because the original order was not merely a support order; it was an agreed support order that departed from the guidelines. That distinction triggered section 156.401(a-1).

The timing mattered. The decree was signed in August 2020, and Father filed his modification action in February 2023. At oral argument, Father conceded he was not proceeding under section 156.401(a)(2) because three years had not yet elapsed. That concession effectively removed the only statutory route by which a guideline disparity alone might have supported modification.

Once section 156.401(a)(2) was out, the case narrowed to section 156.401(a-1). Under that subsection, the only route to modification was proof of a material and substantial change in circumstances since rendition of the agreed order. Mother’s summary-judgment motion attacked that element directly. Father did not file a response to the motion, and on appeal he did not challenge the trial court’s conclusion that no fact issue existed on material and substantial change. As a result, his appellate arguments about guideline noncompliance did not answer the dispositive statutory question.

The court therefore held that the trial court did not err by granting summary judgment on the modification claim without separately adjudicating whether the prior agreed amount substantially complied with Chapter 154. Before the three-year benchmark, and in the context of an agreed deviation, that issue did not independently authorize modification.

Holding

The court held that when parties agree to a child-support order that differs from the Chapter 154 guideline amount, section 156.401(a-1) governs a later modification request and requires proof that the circumstances of the child or a person affected by the order have materially and substantially changed since the order was rendered. In that procedural posture, the movant cannot avoid the statutory change-in-circumstances requirement by arguing only that the agreed support amount deviates from the guidelines.

The court further held that section 156.401(a)(2) was unavailable because the three-year period had not elapsed. Father’s concession on that point was significant, because it foreclosed reliance on the 20%/$100 guideline-difference test as an independent basis for modification.

Finally, the court held that Father’s failure to challenge the no-material-change basis for summary judgment was fatal to his appeal. Because Mother’s motion squarely raised the absence of a material and substantial change, and Father neither responded below nor attacked that ground effectively on appeal, the summary judgment was properly affirmed.

Practical Application

For practitioners, this case is a reminder that agreed support provisions should be drafted and litigated with modification consequences in mind. If your client negotiates a support number that intentionally departs from guideline support, that bargain may be difficult to revisit in the short term absent developed evidence of a material and substantial change. In practical terms, an above-guidelines obligor cannot simply return to court within three years and ask for a reset to guideline support because the original agreement now appears unfavorable.

This has immediate effects in several recurring contexts. In divorce cases resolved by MSA, counsel should create a record explaining why the deviation is appropriate and should advise the client that the order may not be easily modifiable before three years. In modification cases, the movant must lead with changed circumstances evidence: income changes, changes in the child’s needs, shifts in insurance costs, disability, employment loss, changes in possession affecting support, or other facts tied to persons affected by the order. For respondents, the case supplies a straightforward summary-judgment framework where the movant’s pleadings lean heavily on guideline disparity but the evidentiary record on changed circumstances is thin or undeveloped.

The opinion also underscores appellate discipline. If summary judgment is granted on the absence of a material and substantial change, the appellant must attack that ground directly. Arguments about guideline calculations, fairness of the original bargain, or generalized statutory noncompliance will not carry the appeal if they do not negate the dispositive basis of the judgment.

Checklists

Evaluate Which Modification Statute Actually Applies

Determine whether the existing child-support order was an agreed order.
Determine whether the agreed amount differs from the Chapter 154 guideline amount.
Calculate whether three years have elapsed since rendition or last modification.
If less than three years have elapsed, assess the case under section 156.401(a-1), not section 156.401(a)(2).
Do not assume a guideline disparity alone authorizes modification of an agreed order.

Build a Material-and-Substantial-Change Record

Identify the date of rendition of the existing support order.
Compare current circumstances to circumstances existing at rendition.
Develop evidence regarding:
changes in either parent’s income or earning capacity
changes in the child’s medical, educational, or special needs
changes in health-insurance availability or cost
changes in possession or caregiving allocation affecting support
remarriage, additional children, disability, or unemployment where legally relevant
Tie the evidence specifically to the statutory requirement that the circumstances of the child or a person affected by the order have materially and substantially changed.

Draft Modification Pleadings Strategically

Plead the correct statutory basis for modification.
If the original order was agreed and non-guideline, expressly plead facts supporting section 156.401(a-1).
Avoid pleading guideline noncompliance as though it were a stand-alone basis for pre-three-year modification.
Include factual allegations with enough specificity to survive early dispositive motion practice.
Align requested relief with the statutory pathway actually available.

Defend Against Weak Modification Claims

Examine whether the movant filed before the three-year mark.
Confirm whether the original support amount was the product of agreement.
Move for summary judgment if the movant lacks competent evidence of material and substantial change.
Frame the motion around the dispositive statutory prerequisite under section 156.401(a-1).
Force the movant to produce evidence comparing circumstances at rendition versus present circumstances.

Preserve and Present Error on Appeal

File a written response to any summary-judgment motion attacking the change-in-circumstances element.
Attach competent summary-judgment evidence creating a fact issue.
On appeal, challenge every independent ground supporting the judgment.
Do not rely exclusively on arguments that the support amount deviates from Chapter 154 if the trial court’s ruling rests on lack of changed circumstances.
Use oral-argument concessions carefully; conceding the inapplicability of section 156.401(a)(2) may effectively narrow the case to a single dispositive issue.

Counsel Clients During Settlement

Explain that a negotiated support amount above or below guideline support may be harder to modify before three years.
Document the business and family reasons for the deviation.
Consider whether stepped support, insurance allocations, and other support components may later become pressure points.
Discuss future modification risk before finalizing the MSA.
Avoid creating unrealistic payment terms that invite early modification litigation without a viable statutory basis.

Citation

In the Interest of S.W.R. and H.G.R., Children, No. 05-24-01237-CV, 2026 WL ___ (Tex. App.—Dallas June 22, 2026, no pet.) (mem. op.).

Full Opinion

Read the full opinion here

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