Year-End Tax Planning Checklist

Why Year-End Planning Matters

The Dutch tax system has several date-sensitive triggers that make December an important planning month. Financial decisions made before December 31 can significantly reduce your tax bill for both the current and upcoming year.

Key dates to keep in mind:

• December 31 — Last day to make charitable donations, pension top-ups, and other deductible payments for the current tax year
• January 1 — Box 3 measurement date. Your asset values on this single day determine your entire year's wealth tax
• March 1 — Tax filing opens for the previous year
• May 1 — Tax filing deadline (extensions available)

Year-End Tax Action Calendar

When	Action	Why It Matters
Oct 1–31	Check jaarruimte (pension deduction space)	Opening a lijfrente account takes time
Nov 1–15	Review toeslagen income estimates	Avoid large repayment demands
Nov 15–30	Plan Box 3 reduction (pre-purchases, mortgage pre-pay)	Jan 1 balance determines full year's wealth tax
Dec 1–15	Execute charitable donations (ANBI)	Must be received by Dec 31 to deduct this year
Dec 15–31	Make lijfrente contribution + final purchases	Payment must be processed before year-end
Jan 1	Screenshot all bank/investment balances	Box 3 measurement date — exact figures needed
Feb	Collect jaaropgaaf + WOZ-beschikking	Needed for tax return filing from March 1

Box 3 Timing Strategies

Box 3 tax is based on your assets on January 1. This creates opportunities:

Reduce assets before January 1

1. Make large purchases — Buy a new car, furniture, electronics, or other personal items before year-end. Personal possessions are not Box 3 assets.
2. Prepay your mortgage — An extra mortgage payment reduces your savings (Box 3) and increases your equity in your home (Box 1, not Box 3).
3. Pay invoices early — Pay upcoming bills, insurance premiums, or subscriptions before January 1.
4. Make charitable donations — Double benefit: reduces Box 3 balance and may be tax-deductible.

What NOT to do

• Don't take on unnecessary debt — While debts reduce your Box 3 base, the interest cost usually exceeds the Box 3 tax savings.
• Don't make investment decisions purely for tax reasons — Selling investments incurs transaction costs and may not be optimal for your portfolio.

Deductions Before December 31

These deductions must be paid before December 31 to count for the current tax year:

Deduction	Requirement	Typical Savings
Charitable donations (giften)	To ANBI/SBBI-registered charities; total > 1% of income (min €60)	~37% of amount donated
Periodic gifts (periodieke giften)	5-year commitment via notarial deed; no threshold	~37% of amount donated
Alimony payments	Payments to former spouse	37–49.5% of amount paid
Specific medical expenses	Unreimbursed expenses above threshold	Varies

Pension Top-Up (Lijfrente)

If you have unused pension deduction space (jaarruimte), you can make a tax-deductible contribution to a lijfrente (annuity pension product) before December 31:

• Jaarruimte: The maximum pension contribution you can deduct, calculated based on your income and existing pension accrual
• Reserveringsruimte: Unused jaarruimte from the previous 7 years can be carried forward
• Deduction rate: Reduces Box 1 taxable income, saving you 37–49.5% depending on your bracket

Example:

• Available jaarruimte: €5,000
• Contribution to lijfrente: €5,000 before December 31
• Tax saving (at 37.56% rate): ~€1,878

30% Ruling Year-End Review

If you have the 30% ruling, review these items before year-end:

1. Check the expiration date — If your ruling expires in the current year, ensure your final paycheck correctly applies it. Your employer should stop the 30% deduction from the expiration month.
2. Accelerate equity vesting — If you have RSUs or stock options scheduled for after the ruling expires, discuss accelerated vesting with your employer. Vesting while the ruling is active saves ~15% on each vesting event.
3. Review partial non-resident status — If you opted for partial non-resident status (Box 3 exemption on foreign assets), confirm this still benefits you. If you bought Dutch property and have a mortgage interest deduction, you may be better off as a full resident.
4. Budget for next year — If the ruling drops from 30% to 27% (2027 transition), or expires entirely, your net income will decrease significantly. Plan accordingly.

Toeslagen Income Check

Before year-end, verify your toeslagen income estimates:

1. Log in to Mijn Toeslagen — Check that your estimated income matches your actual income for the year
2. Adjust for bonuses — If you received a bonus or salary increase, update your estimate to avoid a large repayment demand next year
3. Check for eligibility changes — If your income changed significantly, you may newly qualify or have lost eligibility for certain toeslagen
4. Report household changes — New partner, child, or housing change? Update immediately

Fiscal Partner Optimization

If you have a fiscal partner, year-end is the time to review your allocation strategy:

• Box 3 asset allocation — Decide how to split savings and investments between partners. Use the double exemption (€118,714 combined) to maximum effect.
• Deduction allocation — Plan whether mortgage interest and donations should be allocated to the higher-earning partner for maximum tax benefit.
• Heffingskortingen transfer — If one partner has little income, the unused algemene heffingskorting can be transferred. Verify this will be applied on your tax return.

Documents to Collect

Gather these documents before year-end (or immediately after) for a smooth tax filing in March:

Document	Source	Needed For
Jaaropgaaf (annual income summary)	Employer (received in February)	Box 1: Employment income
Bank statements (Jan 1 balances)	Your bank	Box 3: Bank savings
Investment portfolio value (Jan 1)	Broker / bank	Box 3: Investments
Foreign account balances (Jan 1)	Foreign banks/brokers	Box 3: Foreign assets
Mortgage annual statement	Bank / mortgage provider	Box 1: Interest deduction
WOZ-beschikking	Municipality (received in February)	Eigenwoningforfait
Donation receipts	Charities (ANBI/SBBI)	Box 1: Deductions
Medical expense receipts	Healthcare providers	Box 1: Specific deductions
Pension/lijfrente contribution proof	Pension provider	Box 1: Pension deduction
RSU/stock option vesting records	Employer / brokerage	Box 1: Equity income

Frequently Asked Questions

When should I start year-end tax planning?

Ideally in October or November, to give yourself time to make financial moves before December 31. Some actions — like opening a lijfrente account or setting up periodic gifts — may need to be arranged with financial institutions in advance, which takes time.

Can I reduce my Box 3 tax by spending money in December?

Yes. Box 3 is measured on January 1. Spending cash on major personal purchases, prepaying your mortgage, or making charitable donations before December 31 reduces your January 1 balance and thus your Box 3 tax for the entire year.

Is it worth making a donation just for the tax benefit?

Donations to registered charities (ANBI) are deductible if they exceed the threshold (1% of aggregate income, minimum €60). At a 36.97% deduction rate, a €1,000 donation effectively costs you ~€630. If you would donate anyway, the tax benefit is a bonus. You should not donate purely to save tax — the net cost is always positive.

What if my 30% ruling expires this year?

If your ruling expires in December, ensure your final paycheck correctly applies the ruling for all eligible months. Budget for significantly higher tax in the next year. Consider accelerating any RSU vesting or option exercises before expiration.

Do I need a tax advisor for year-end planning?

Not necessarily for straightforward situations. But if you have significant investments, equity compensation, a fiscal partner, or the 30% ruling ending soon, a one-time consultation (€200–€400) with an international tax advisor can save substantially more than it costs.