What Exactly Should Be Included in the Three Figures for Completion Costs?

Three figures should be prepared: (1) cash required to complete the purchase—covering the sale price, transfer taxes, stamp duties, legal fees, and any deposits; (2) normal annual running cost—HOA or estate fees (if applicable), utilities, maintenance, insurance and expected annual increases; and (3) a repair reserve—to fund unexpected repairs or major replacements over time. Have your Thai lawyer or accountant prepare formal calculations based on the exact contract and property details, and request separate seller estimates from invoices plus independent calculations to avoid mixing figures. Distinguish one-off costs from recurring costs and note items that could change with currency, occupancy or ownership structure. Tie payments to verifiable milestones or progress where possible. Be mindful of potential tax changes and ensure the contract provides protections. Keep written notes and attach supporting documents for each figure so you can adjust if circumstances change.