Related-party interest above thin-cap ratios is how ‘debt is cheaper than equity’ becomes non-deductible interest.
China thin-capitalisation rules restrict CIT deductions for interest on related-party financing beyond specified debt-to-equity style ratios (with sector nuances). Excess interest may be denied currently. Documentation of genuine debt and arm’s-length rates still matters alongside the ratio. This wiki is the thin-cap definition. TP documentation and related-party fees sit beside it when labelling payment as interest vs service. SAFE inbound capital rules are banking overlays for the cash itself.
4 questions before you choose the route.
This page identifies the right question and evidence. It does not determine the legal outcome on a reader’s facts.
Related-party debt identified?
Map loans.
DebtRatio test passed?
Compute.
RatioRate arm’s length?
TP overlay.
RateReally a service fee?
Character.
LabelWorking rule: Map the regulated role before marketing or launch in China.
The signal ledger.
These facts move the question beyond a label and into a product, money-flow and control analysis.
Bring a compact evidence docket—not a pitch deck.
Give a compliance team or counsel the operating facts that reveal the perimeter.
Questions people ask before they build.
Short answers for orientation. The right result can change with the service model and current rules.
Does thin-cap kill the loan legally?
It is mainly a deduction limitation for CIT, not automatic voiding of civil debt. Still model cash.
Where is TP docs?
Open /transfer-pricing-documentation-in-china.
Primary authorities
Reviewed sources support orientation, not a fact-specific assessment.