Solutions · Tax & Audit

Defensible tax positions, at engagement scale

Eligibility criteria, treaty logic and audit programmes made computable, so every position carries the reasoning that produced it.

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Policy artefacts

Criteria captured from the legislation, not from tribal memory
Evidence packs generated with every determination
Change control when guidance or rates move

3 accelerators3 case studies

Where it applies

Decisions made computable in tax & audit

R&D eligibility qualified against HMRC criteria before submission

Treaty and double-taxation positions resolved with a reviewable rationale

Gross-up and mobility calculations run consistently across jurisdictions

100% population testing in place of sampling, with severity-graded exceptions

Why Rainbird

Tax authorities are asking harder questions. Computable Policy ensures every claim and classification is backed by the reasoning that produced it, so your team can defend any position and your clients can trust the advice.

Accelerators

Every tax & audit accelerator

In testing means the graph exists and we are hardening the evals. In build means the decision is scoped and the model is in development.

Tax

UK-US Double Taxation Resolver

Resolve UK-US double taxation positions, from residence and treaty tie-breakers to foreign tax credit ordering, with a rationale a dual-qualified adviser could review.

In testing

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Tax

Global Mobility Payroll & Gross-Up Engine

Run iterative gross-up and gross-to-net calculations across jurisdictions, applying tax equalisation policy and social security logic with a full audit rationale.

In build

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Audit & Assurance

Lending File Audit & Assurance

Re-perform lending decisions against the policy and regulation in force at the decision date, enabling 100% population testing with severity-graded exceptions and audit-ready evidence packs.

In build

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Proof

Tax & Audit outcomes in production

Organisations that cannot afford a wrong decision.

BDO: One model behind every sustainability applicability decision

BDO's audit practice runs every sustainability applicability decision through Rainbird. One knowledge graph replaced multiple regulatory decision trees, giving consistent answers at scale with a full evidence trail behind every one.

Read the case study →Tax & Audit