Sri Lanka
Ordinary self-employment income taxed on a progressive 6-36% scale after a LKR 1.8M tax-free threshold (effective April 2025), via quarterly self-assessment with no mandatory social contributions. Crypto is legal to hold but not usable for payment; USDC received is valued in LKR.
Self-employment / business or professional services income, ordinary income (not capital gains); self-assessment with quarterly instalments, expenses deductible.
Progressive from 1 April 2025: 0% up to LKR 1.8M relief, then 6 / 18 / 24 / 30 / 36% above LKR 4.3M. Effective ~6-36%.
No mandatory social security for a self-employed individual with no employees; EPF/ETF membership is voluntary.
Standard progressive self-assessment with quarterly instalments. A possible 15%-capped service-export foreign-income treatment is fact-specific and should be confirmed.
Not legal tender and cannot be used for payments (CBSL, reaffirmed Sept 2025), but holding/investing is not banned. IRD treats crypto as intangible property; USDC received is business income at LKR value, on general guidance.