December isn't just about holidays—it's your last chance to optimize this year's taxes. Once January 1st arrives, most opportunities are gone. Use this checklist to ensure you've maximized deductions, ensured compliance, and set yourself up for a smooth filing season.
Review Your Income and Expenses
Gather all income statements, invoices issued and received, bank statements, and receipts for business expenses. Ensure everything is categorized correctly and matches your records. Look for anything miscategorized or missing.
Discrepancies found now are much easier to resolve than during an audit.
Maximize Retirement Contributions
Contributions to supplementary pension insurance are deductible up to 24,000 CZK annually. If you haven't maxed out, make additional contributions before December 31 to claim them on this year's return.
This is free money in tax savings—don't leave it on the table.
Review Investment Gains and Losses
If you sold investments this year, calculate your capital gains or losses. Consider tax-loss harvesting—selling losing positions to offset gains—before year-end if it makes sense for your portfolio.
Work with a financial advisor on this; the tax implications can be significant.
Complete Charitable Donations
Donations to registered charities can be deducted if they exceed 2% of your taxable income or 1,000 CZK (whichever is higher). Complete donations before December 31 and ensure you obtain proper receipts that meet legal requirements.
Update Personal Information
Did anything change this year? Marital status, address, new dependents, bank details? Report relevant changes to the Financial Administration. These affect tax credits and how you file.
A new child means significant tax benefits—but only if properly claimed.
Check Your VAT Obligations
If your turnover approached or exceeded 2 million CZK, prepare for VAT registration. Review whether voluntary registration makes sense for your business going into the new year.
Don't be caught off guard by mandatory registration requirements.
Organize Your Documentation
Create organized folders for income, expenses, receipts, contracts, and correspondence. Digital backup of all documents ensures nothing is lost. Keep records for at least three years (ten is safer).
A few hours organizing now saves days of stress at filing time.
Review Your Business Structure
For business owners: does your current structure (sole proprietor, LLC) still make sense? Changes to business structure should generally be made before year-end for maximum benefit in the coming year.
Plan for Next Year's Advances
If this year's tax exceeded 30,000 CZK, calculate and prepare for quarterly advance payments next year. Set aside funds now to avoid cash flow problems when payments come due.
Knowing what's coming lets you plan rather than scramble.
Schedule Your Tax Advisor Consultation
Book early appointments for January or February to review your situation and prepare for filing season. Advisors get very busy as deadlines approach—getting in early means better availability and more time for thorough review.
This is especially important if your situation changed significantly this year.