Tax evasion Study Guide

📖 Core Concepts Tax evasion – illegal, intentional actions (e.g., under‑reporting income, overstating deductions, bribery) to reduce tax liability. Tax avoidance – lawful use of tax rules to lower the tax bill; still “non‑compliance” but legal. Tax gap – the difference between taxes that should be collected (true liability) and taxes actually collected. Gross tax gap components – non‑filing gap, under‑reporting gap, under‑payment (remittance) gap. Allingham‑Sandmo model (1972) – a risk‑averse taxpayer chooses how much income to hide, balancing detection probability, penalty severity, and personal risk aversion. Motivational drivers – financial gain, risk tolerance, perceived unfair exchange of taxes ↔ public services. --- 📌 Must Remember Evasion vs. avoidance: Evasion = illegal, avoidance = legal. Tax gap formula: $$\text{Gross Tax Gap} = \text{True Tax Liability} - \text{Taxes Remitted on Time}$$ Key determinants in the Allingham‑Sandmo model: Probability of detection (\(p\)) – higher \(p\) → less evasion. Severity of punishment (\(F\)) – higher fines/imprisonment → less evasion. Risk aversion (\(\gamma\)) – more risk‑averse → less evasion. Empirical correlates of higher evasion: higher tax rates, higher unemployment, higher income/wealth, dissatisfaction with government. Common evasion tactics: under‑invoicing, mis‑declaring quantity, mis‑describing HS codes, using shell companies, smuggling, under‑reporting VAT sales. Enforcement tools: privatized tax collection, tax farming, audits, criminal penalties (fines + imprisonment). --- 🔄 Key Processes Allingham‑Sandmo decision Taxpayer estimates undeclared income \(U\). Calculates expected utility: \(EU = (1-p)U^{1-\gamma} + p(1-F)U^{1-\gamma}\). Chooses \(U\) that maximizes \(EU\). Tax gap measurement Step 1: Estimate true liability (tax returns, third‑party data). Step 2: Subtract taxes actually paid on time → gross gap. Step 3: Disaggregate into non‑filing, under‑reporting, and under‑payment components. Customs duty evasion workflow Importer declares value/quantity → customs applies duty → If under‑invoicing or mis‑describing → duty paid < true amount → evasion. Tax farming Government pays lump‑sum to private collector → collector keeps all collected revenue → bears evasion risk → incentivizes aggressive enforcement. --- 🔍 Key Comparisons Tax evasion vs. tax avoidance Evasion: illegal, concealed; Avoidance: legal, transparent. Under‑filing gap vs. under‑reporting gap Under‑filing: taxpayer fails to file a return at all. Under‑reporting: taxpayer files but reports too little income or sales. Customs duty evasion vs. smuggling Duty evasion: falsified paperwork but goods still pass customs. Smuggling: goods move covertly, no customs declaration at all. --- ⚠️ Common Misunderstandings “All tax non‑compliance is illegal.” – Avoidance is lawful; only deception = evasion. “Higher penalties automatically stop evasion.” – Effectiveness depends on detection probability and risk aversion together. “Only individuals evade taxes.” – Corporations often engage in sophisticated avoidance; high‑wealth individuals use shell companies to evade. “Tax gap = only under‑reporting.” – It also includes non‑filing and late/under‑payment gaps. --- 🧠 Mental Models / Intuition “Detect‑Punish‑Risk” triangle – Visualize evasion as a triangle where each corner (probability of detection, severity of punishment, taxpayer risk aversion) pulls the taxpayer toward compliance. Reduce any side → more evasion. “Hidden income = secret stash” – Imagine the taxpayer’s undeclared income as money hidden in a vault; the chance of the vault being opened (audit) and the cost if caught (fine) determine how much they store. --- 🚩 Exceptions & Edge Cases Low‑rate jurisdictions – Even with low detection probability, very low penalties may still deter evasion if public compliance sentiment is strong. Privatized enforcement – May increase detection in high‑profit sectors but can create “tax farming” incentives that over‑collect or target easy wins. Shell companies – Legal if properly disclosed; illegal when used to conceal true owners or income. --- 📍 When to Use Which Assessing compliance risk → Use probability of detection and penalty severity as primary levers; if either is low, focus on risk‑aversion interventions (e.g., education, public service messaging). Measuring tax gap → Apply the gross gap formula and then break down into its three components; choose the component analysis that matches available data (e.g., third‑party reporting for under‑reporting). Choosing enforcement tool → High‑value, low‑volume sectors → Tax farming (lump‑sum incentive). Broad‑based consumer taxes → Audits & criminal penalties. Resource‑constrained agencies → Privatized collection for targeted arrears. --- 👀 Patterns to Recognize “Under‑invoicing + high duty rate” → Likely customs duty evasion. “Shell company + offshore ownership” → Red flag for income‑tax evasion. “Rising tax rates + political dissatisfaction” → Predictable spike in evasion rates. “Non‑filing + high‑income individuals” → Large contribution to the non‑filing gap. --- 🗂️ Exam Traps Distractor: “Tax avoidance is illegal.” – Wrong; it is legal. Distractor: “The tax gap only measures unreported income.” – Wrong; it also includes non‑filing and under‑payment. Distractor: “Higher penalties alone guarantee compliance.” – Wrong; detection probability and risk aversion matter too. Distractor: “Smuggling is just a form of customs duty evasion.” – Wrong; smuggling bypasses customs declaration entirely. Distractor: “All high‑income taxpayers evade taxes.” – Over‑generalization; many comply or use avoidance strategies. ---