Your Dutch employer's HR team handles the 30% ruling. They don't touch your India-side compliance. The two have to be coordinated.

The 30% ruling is a Dutch tax break for incoming high-skilled migrants. Once the Belastingdienst (Dutch tax authority) approves the application your employer files for you, 30% of your gross salary is treated as a reimbursement of 'extraterritorial costs' — the imputed expenses of moving to and living in a foreign country. That 30% slice is tax-free.

The practical effect for an Indian engineer on a €100,000 gross salary: instead of paying Dutch income tax on the full €100k (which would hit progressive Dutch brackets reaching 49.5% at the top), you pay tax on €70k while €30k stays exempt. The effective tax rate drops by roughly 10-12 percentage points, depending on the bracket math.

This is genuinely valuable. It's also why every Indian recruiter mentions it in the first interview. The part recruiters don't mention: the 30% ruling is purely a Dutch-side benefit. It does nothing for the Indian source of your income — your NRO interest, your Indian mutual fund redemptions, your RSU tranches earned during India years that vest after you arrive in Amsterdam. All of that runs on a different system, with its own paperwork.

Eligibility for the 30% ruling has three core conditions. You must have been recruited from outside the Netherlands (the 'incoming' requirement), hold scarce expertise (typically demonstrated through an income threshold the Belastingdienst updates annually — €48,013 general and €36,497 for under-30s with a master's degree for 2026, rising again for 2027), and your employer must apply for the ruling on your behalf within four months of starting work.

For Indian tech workers on a Highly Skilled Migrant visa, the first two conditions are almost always met. Your engineering salary at Booking, ASML, ING, or Adyen will clear the income threshold. The third — the four-month employer application window — is what gets missed when HR teams are unfamiliar with Indian migrant cases.

The maximum duration was cut from 8 years to 5 years back in 2019 and has stayed at 5 years since. What's moved more recently is the percentage. The Rutte IV coalition legislated a step-down from 30% in years 1-2 to 20% in years 3-4 to 10% in year 5 ('30/20/10'). That step-down was reversed by the Senate's approval of the 2025 Tax Plan amendment on 17 December 2024 and never took practical effect. The current rule: 30% maintained through 2026, then a flat 27% from 1 January 2027 onward applying broadly across active rulings (narrow grandfathering preserves 30% for some pre-2024 grantees). Plan your salary structure assuming 5 years of benefit at 30% if you start by end-2026, or 27% if you start in 2027 or are absorbed into the flat-27% regime mid-ruling.

Until recently, holders of the 30% ruling could elect to be treated as 'partial non-residents' for Box 2 (substantial shareholding) and Box 3 (savings and investments) Dutch tax purposes — even though they were full residents for Box 1 (employment income). The election meant Indian mutual funds, NRO/NRE deposits, foreign brokerage accounts, and Indian property were not taxed under Dutch Box 3. For Indian engineers with substantial Indian asset bases, this was the single most valuable feature of the 30% ruling package.

That lever has been narrowed. The 2024 Dutch tax plan abolished the partial non-resident election for new applicants from 1 January 2025 onwards. Pre-2024 grantees who already held the election keep it under transitional rules through tax year 2026, but it ends for everyone from 1 January 2027.

For an Indian engineer arriving in Amsterdam in 2025 or later: the partial non-resident shield is no longer available. Your worldwide assets — including Indian mutual funds, NRO deposits, your Bengaluru flat's rental income — are now within scope of the standard Dutch tax framework, with Box 3 applying to your savings/investment holdings (subject to the post-2021 bridging law's actual-return rules). Indian rental income gets reported in Box 1 and worldwide tax is computed.

For pre-2024 grantees in their final transitional years (2025 and 2026): use the remaining window. Realise any planned Indian mutual fund exits, restructure brokerage holdings, and document the asset position carefully before the election expires on 1 January 2027.

Indian-source income is taxed at source in India regardless of your Dutch tax status. Your NRO FD interest faces India's default 30% TDS unless you've filed Form 10F + TRC with the bank, in which case it drops to the India-Netherlands treaty cap of 10% under Article 11. Your Indian mutual fund redemptions face AMC withholding at the statutory rate. Your Indian dividends face a flat 10% cap under Article 10(2) of the treaty for any Dutch beneficial owner (rate set by the original 1988 treaty itself; the lower MFN-based 5% rate that had been claimed in some prior years was rejected by the Indian Supreme Court's October 2023 ruling).

The 30% ruling has no effect on any of this. The two systems operate in parallel.

What makes the coordination matter: when you report your worldwide income in the Netherlands (mandatory if you're a Dutch tax resident for Box 1), the Indian-source income enters the calculation. The Belastingdienst applies the treaty's relief mechanism — typically the exemption-with-progression method for income that's already taxed in India under the treaty — to avoid double taxation. Without your Indian Form 10F + TRC + Form 16A trail, you can't substantiate the Indian withholding to the Belastingdienst and they default to taxing it fully in NL.

Three patterns we see repeatedly. First: treating the 30% ruling as the answer to everything. Engineers assume that because their Dutch tax is reduced, they don't need to do anything on the India side. They forget Form 10F. They forget the partial non-resident election. They forget Form 67 FTC for Indian-source income that ended up reported in NL. Each forgotten step is small in isolation; together they leak several lakh rupees per year for someone with substantial Indian holdings.

Second: vested RSUs from the Indian employer (or the Indian subsidiary of the Dutch employer) get treated as 100% Dutch-source because they vested in Amsterdam. The days-of-service split — covered in detail in our cross-border RSU/ESOP article — splits that vest by where you actually worked during the vesting period. The India portion remains India-source and is taxable in India.

Third: closing Indian bank accounts and selling Indian mutual funds 'because I'm settled in Amsterdam now'. The 30% ruling lasts 5 years. If you stay longer than that, you switch to full Dutch tax rates and the Indian assets that you sold prematurely (often at sub-optimal tax timing) can't be re-established cheaply. Most engineers should keep their Indian asset base intact for the full duration of the 30% ruling and re-evaluate at year 4 with a CA who handles both sides.

January-March: File your Dutch tax return (taxpayer-requested extension can push from 1 May to 1 September; a registered Dutch tax advisor enrolled in the Uitstelregeling scheme can extend the deadline further, often into the following year). If you're still in the pre-2024 transitional regime, make the partial non-resident election.

April-May: File Indian ITR-2 for the prior FY. As an Indian non-resident living in NL, claim treaty rates on NRO interest, dividends, and capital gains where Form 10F was on file with the deductor. NRIs do NOT file Form 67 — that form is restricted to Indian residents claiming credit for foreign tax paid. Your Indian-source income is taxed at India's treaty rate; relief for the Dutch side happens in the Dutch return via exemption-with-progression.

June-September: Refile Form 10F (or Form 41 from FY 2026-27) with your NRO bank to keep treaty rates flowing for the new financial year. Refresh your TRC from the Belastingdienst.

October-December: If you're approaching year 5 of the 30% ruling, plan the transition. Consider whether to redomicile back to India (the RNOR window math), stay in NL and absorb the higher tax (Box 3 will start biting once the partial non-resident election expires for everyone from 1 January 2027), or move to a third country (Singapore, UAE).

This rhythm catches the coordination points before they become refund cycles, condonation petitions, or notices. The 30% ruling is generous; what kills the benefit is the un-coordinated India side, not the Dutch side itself.