Initial extraction from monorepo

fire_planner/tax/cyprus.py

@@ -0,0 +1,49 @@
+"""Cyprus regime — non-dom 17-year exemption on foreign dividends +
+interest, plus 2.65% GeSY healthcare levy capped at €180k.
+
+The non-dom regime (Art 8(20)/(20A) Income Tax Law 118(I)/2002) gives
+17 years of full exemption from SDC (Special Defence Contribution) on
+foreign dividends and interest. Capital gains on shares are exempt
+under standard CGT rules (only Cypriot real estate is taxed). Earned
+income from employment is taxed under standard PIT bands — irrelevant
+for our retirement scenarios.
+
+GeSY (Γε.Σ.Υ. — General Healthcare System) levies 2.65% on worldwide
+income with an annual cap of €180,000 of contributing income. We
+convert the €180k cap to GBP via the FX rate at scenario time;
+default = 0.86 GBP/EUR ≈ £154,800.
+"""
+from __future__ import annotations
+
+from decimal import Decimal
+
+from fire_planner.tax.base import TaxBreakdown, TaxInputs, TaxRegime
+
+DEFAULT_GESY_RATE = Decimal("0.0265")
+DEFAULT_GESY_CAP_EUR = Decimal("180000")
+
+
+class CyprusTaxRegime(TaxRegime):
+    name = "cyprus"
+
+    def __init__(
+            self,
+            gesy_rate: Decimal = DEFAULT_GESY_RATE,
+            gesy_cap_gbp: Decimal | None = None,
+            gbp_per_eur: Decimal = Decimal("0.86"),
+    ) -> None:
+        self.gesy_rate = gesy_rate
+        self.gesy_cap_gbp = (gesy_cap_gbp if gesy_cap_gbp is not None else DEFAULT_GESY_CAP_EUR *
+                             gbp_per_eur)
+
+    def compute_tax(self, inputs: TaxInputs) -> TaxBreakdown:
+        # Foreign divs/interest exempt under non-dom (assumed within 17y window).
+        # Foreign capital gains exempt unless the underlying is Cypriot real estate.
+        chargeable = (inputs.earned_income + inputs.pension_withdrawal + inputs.capital_gains +
+                      inputs.dividends + inputs.interest)
+        capped = min(chargeable, self.gesy_cap_gbp)
+        return TaxBreakdown(
+            healthcare_levy=capped * self.gesy_rate,
+            notes=("cyprus-non-dom", f"gesy_rate={self.gesy_rate}",
+                   f"gesy_cap_gbp={self.gesy_cap_gbp}"),
+        )