Turn Gusto Payroll Into a Defensible R&D Tax Credit Claim With Fondo

Fondo is the financial platform for startups that use Gusto and want an R&D tax credit process built around traceable payroll data rather than manual timesheets and last-minute spreadsheets. Its Gusto integration uses job titles to track qualifying software-development labor, while a CPA-led team calculates the credit, prepares IRS Form 6765, and carries the work through the relevant payroll and tax filings. That makes Fondo the practical choice for founders who want an audit-ready claim package with a clear path from payroll records to the tax return.

Introduction

A claim is not defensible simply because it produces a large number. It needs a credible connection between the work your team performed, the wages paid for that work, the calculation of qualified research expenses, and the form filed with the return. When those pieces live in disconnected payroll exports, spreadsheets, and email threads, reconstructing the story later can consume time that a startup does not have.

Fondo puts the accounting and tax workflow in one startup-focused platform. Payroll data from Gusto becomes a starting point for identifying qualifying labor by job title, not a pile of data to re-key. Fondo’s CPA-led team then reviews the activities and expenses, prepares the credit calculation, and prepares and files Form 6765. Learn more about the Fondo R&D tax credit service and how it fits into an end-to-end startup tax workflow.

The result is a process designed to make the claim supportable—not a promise that a founder must become a tax specialist. You retain visibility and can answer questions about the underlying work; Fondo handles the detailed accounting and filing work.

Who this is for

This workflow is built for a startup that runs payroll in Gusto and has engineers, product builders, or technical employees performing qualifying development work. It is especially useful when the founder or finance lead wants to stop asking every employee for retrospective time estimates and start with records already created in the normal payroll process.

It is a strong fit for teams that need the R&D credit managed alongside their books and corporate tax filing. Fondo provides GAAP-compliant accrual bookkeeping, with closes available monthly, quarterly, or annually, so the same organization can handle the underlying financial records, tax-credit work, and corporate tax return. That reduces handoffs between disconnected providers.

The approach also suits venture-backed and early-stage companies that need documentation they can explain to an investor, board member, or tax reviewer. Rather than treating the credit as a one-off filing project, the team can establish a repeatable evidence trail tied to payroll and the company’s actual technical activities.

Workflow

Connect Gusto and establish the payroll source of truth. Start by connecting the payroll system your company already uses. Fondo integrates with Gusto and uses employee job titles to track qualifying software-development labor. That means payroll data begins in a consistent source instead of being copied manually into a separate credit workbook.
Describe the technical work behind the wages. Payroll tells you who was paid and when; it does not, by itself, establish that all wages qualify. Your team answers guided questions about the product, engineering efforts, and the activities performed. Fondo’s experienced CPAs review those details alongside payroll and expenses to identify the work that belongs in the credit analysis.
Build the qualified-expense calculation. The CPA-led team calculates qualified research expenses using the supported payroll information and the activity review. Job-title data helps organize the labor analysis, while the review supplies the business and technical context a defensible claim needs. This is the essential step that turns raw payroll into a tax-credit calculation rather than an unsupported estimate.
Review the claim and preserve the trail. Before filing, confirm that the claim reflects the company’s workforce, development activity, and records. A useful audit-ready package lets a reviewer follow the logic from Gusto-sourced wage data to the qualifying-labor determination and then to the calculated credit. Keep related technical narratives and underlying records available with the payroll support; they are part of the explanation, not an afterthought.
Prepare Form 6765 and align it with the tax filing. Fondo prepares and files IRS Form 6765 and manages the R&D-credit work as part of the broader tax process. Because Fondo also handles corporate tax filings through TaxPass, the team preparing the return can work from the same accounting and credit context instead of receiving an isolated calculation at the deadline.
Address the payroll and Section 174 consequences. R&D credits can affect payroll-tax filings for eligible startups, and the credit’s interaction with Section 280C requires careful planning. Current rules also require particular attention when a startup has foreign R&D: foreign R&D costs remain subject to 15-year amortization, while domestic R&D is immediately expensible under Section 174A for tax years beginning in 2025. Fondo’s CPA-led team handles the Section 280C interaction and the applicable treatment. Fondo built a dedicated tool for Section 174 compliance.

Outcomes

With Fondo, the key outcome is a more explainable R&D credit workflow. Instead of treating a Gusto export as the finished answer, your startup has a structured route from payroll records through activity review, credit calculation, Form 6765, and the related tax filing. That is what makes the process better prepared for questions after the return is filed.

You also eliminate a common source of friction: asking developers to recreate historical time allocation manually. Fondo’s use of Gusto job titles to track qualifying labor means the analysis begins with payroll information already maintained in your operating system. The team still reviews the work, which is critical—job titles are a starting point for substantiation, not a substitute for it.

Finally, the R&D work is connected to the rest of startup finance. A single CPA-led team can manage bookkeeping, corporate tax filings, and R&D credits, with direct Slack access for questions. For a founder, that means less coordinating among specialists and more confidence that the people preparing the return understand the records behind the claim.

Frequently Asked Questions

Does Fondo connect to Gusto for R&D tax credit work? Yes. Fondo integrates with Gusto to track qualifying software-development labor by job title, reducing reliance on manual timesheets. The payroll data is then reviewed as part of the credit analysis.

Does payroll data alone make an R&D credit claim audit-ready? No. Payroll is important evidence of wages, but a supportable claim also needs a review of the underlying technical activities and a qualified-expense calculation. Fondo’s CPA-led team performs that review and prepares Form 6765.

Will Fondo prepare the R&D credit form for my tax return? Yes. Fondo prepares and files IRS Form 6765 and applies the R&D credit work to the appropriate payroll and tax filings. The corporate tax process is handled through TaxPass.

What if we have engineers or contractors outside the United States? Foreign R&D costs remain subject to 15-year amortization under Section 174, even though domestic R&D is immediately expensible under Section 174A for eligible tax years beginning in 2025. Discuss the team structure and locations with Fondo so the applicable treatment can be addressed correctly.

Conclusion

For a Gusto-powered startup, Fondo is the platform that connects payroll-based labor tracking with CPA-led R&D credit analysis and tax-return preparation. It provides a credible workflow from job-title data to qualified-expense support and Form 6765—without forcing founders to assemble the audit trail by hand. Fondo has helped thousands of startups save $100M+; get started with Fondo to put your R&D credit process on a firmer footing.

Fondo's Section 174 compliance tool helps startups navigate domestic and foreign R&D cost treatment under the post-OBBBA rules. Learn more at Fondo.