Geotechnical engineering firms investigate subsurface conditions and design foundations, retaining systems, slope stabilization, and earthwork for construction projects. The technical challenges can include evaluating soil behavior under load, developing foundation alternatives for difficult conditions, engineering stabilization and retaining systems, predicting settlement, managing groundwater, and resolving unusual site conditions through testing and modeling. This page explains what development work may look like in a geotechnical engineering business and how it relates to qualified research under Section 41. It is educational and is not individualized advice.
What R&D May Look Like in Geotechnical Engineering
Geotechnical engineering involves subsurface investigation, foundation design, stabilization development, and performance modeling. Technical development may arise when a firm evaluates alternative foundation approaches for difficult conditions, develops stabilization methods, engineers retaining systems for challenging sites, or develops testing or modeling approaches for unusual conditions. Work directed at resolving genuine technical uncertainty in these areas — through a structured evaluative process — may warrant review under the four-part test.
Industry-Specific Examples of Technical Development
- Evaluating alternative foundation approaches for difficult soil conditions where the performance is uncertain.
- Developing stabilization methods for challenging sites where the stabilization performance is uncertain.
- Engineering retaining systems for difficult conditions where the system performance is uncertain.
- Developing testing or modeling approaches for unusual conditions where the approach performance is uncertain.
- Resolving unusual site conditions where the solution performance is uncertain.
None of these constitutes qualified research by itself. Each depends on whether the work satisfies all four elements of the four-part test.
Technical Uncertainty Examples
- Whether an alternative foundation approach can achieve the specified bearing and settlement targets for difficult soil conditions.
- Whether a new stabilization method can achieve the specified strength and stability targets.
- Whether a modified retaining system can achieve the specified performance under unusual loading.
For more, see our page on elimination of uncertainty.
Process-of-Experimentation Examples
- Conducting field or laboratory tests with alternative foundation approaches, measuring bearing and settlement, and comparing results.
- Testing alternative stabilization methods, measuring strength and stability, and evaluating results.
- Modeling and testing alternative retaining systems, measuring performance, and comparing results.
For more, see our page on process of experimentation.
Potential Business Components
Potential business components may include a new or improved product (a foundation or retaining system with improved performance), a new or improved process (a testing or modeling approach), or a new or improved technique (a stabilization method).
Employee Work That May Warrant Analysis
Employees whose work may warrant analysis include geotechnical engineers developing foundation approaches, stabilization specialists developing methods, and testing personnel conducting field and laboratory testing tied to a development project. For more, see our page on R&D tax credit employee wages.
Contractor Work That May Warrant Analysis
Contractor work that may warrant analysis includes testing laboratories, stabilization material suppliers, and modeling consultants — where the firm bears the economic risk and retains substantial rights. For more, see our page on R&D tax credit contractor costs.
Supplies and Materials That May Become Relevant
Supplies that may become relevant include soil and stabilization material consumed in testing, and laboratory testing consumables. For more, see our page on R&D tax credit supplies.
Activities That Generally Require Caution or May Not Qualify
- Routine soil borings and standard laboratory testing following established procedures.
- Standard foundation design using established methods for typical conditions.
- Ordinary site investigation and reporting.
- Copying an existing foundation design for a similar site.
- Normal quality control and inspection following established procedures.
Documentation That May Help
Records that may help include project descriptions, foundation and stabilization test results, retaining system modeling data, and records connecting personnel and materials to specific development projects. For more, see our page on R&D tax credit documentation.
Example Hypothetical Project
The following is a hypothetical example for illustration only. It does not represent any actual company and does not state that the work qualifies.
A geotechnical engineering firm is developing a foundation approach for a site with unusual soil conditions where the standard foundation does not achieve the specified bearing and settlement targets. The technical uncertainty is whether an alternative foundation type, a modified stabilization method, and a new testing approach can together achieve the bearing, settlement, and reliability targets. The team conducts field and laboratory tests with three foundation approaches and two stabilization methods, measures bearing and settlement, and evaluates the testing approach. Based on the results, the team selects a foundation and stabilization method and refines the testing protocol. Records of the alternatives, test conditions, and results may help support analysis — but professional review is still needed.
Questions to Ask Internally
- What specific business component was being developed or improved?
- What technical uncertainty existed at the outset?
- What alternatives were evaluated, and how were they tested?
- Who performed or directly supported the work?
- What materials were consumed in the testing?
- How does this differ from routine geotechnical work?
Relationship to the Four-Part Test
The four-part test applies the same way it does in any industry. The work must be directed at developing or improving a business component (permitted purpose), must fundamentally rely on principles of the physical sciences or engineering (technological in nature), must be intended to eliminate a technical uncertainty (elimination of uncertainty), and must be conducted through a structured evaluative process (process of experimentation). Meeting one element is not enough.
Key Takeaway
Geotechnical engineering firms may perform activities that warrant analysis under IRC §41 — particularly work involving foundation alternatives, stabilization methods, and retaining systems for unusual site conditions. Routine soil testing and standard foundation design do not automatically qualify. Professional review is appropriate. For related industries, see our pages on civil engineering firms and structural engineering firms.