St Kitts vs Antigua Citizenship by Investment: 2026 Cost and Passport Comparison

If you are buying a Caribbean passport in 2026 and have narrowed it to these two, the decision is simpler than the marketing suggests. Antigua and Barbuda is the cheapest option for a family of four. St Kitts and Nevis is the more established name with a marginally stronger passport and no physical-presence obligation. Below the headline price, both programs now look more alike than ever, because the 2024 to 2026 regional reforms pushed all five Eastern Caribbean countries onto a shared rulebook. The choice comes down to family size, your tolerance for a travel requirement, and how much you value brand pedigree over raw cost.

The head-to-head

Both are donation-based routes. You make a non-refundable contribution to a government fund, pass due diligence, attend a mandatory interview, and receive citizenship for life that passes to future generations. Neither requires you to live in the country, with one important exception on the Antigua side that we cover below.

St Kitts and Nevis runs the older program, launched in 1984, and trades heavily on that pedigree. Its fund is the Sustainable Island State Contribution (SISC), with a floor of USD 250,000 that covers a single applicant or a family of up to four. Antigua and Barbuda, operating since 2013, uses the National Development Fund (NDF) with a floor of USD 230,000 that also covers a family of up to four. That USD 20,000 gap at the fund level is real, and it widens once you add government and due diligence fees, which is where most published comparisons mislead by quoting only the contribution.

Cost by family size

This is the part that actually decides most cases. The contribution is only the start. You also pay government processing fees, due diligence per adult, and passport issuance per person. Here is the realistic all-in picture for 2026, contribution plus core government fees.

Item	St Kitts and Nevis (SISC)	Antigua and Barbuda (NDF)
Program launched	1984	2013
Single applicant, contribution	USD 250,000	USD 230,000
Family of 4, contribution	USD 250,000	USD 230,000
Each extra dependent (under 18)	USD 25,000	included to 4, then USD 10,000 from 5th
Each extra dependent (18+)	USD 50,000	USD 10,000 from 5th
Government processing fee	approx USD 250 per applicant	USD 20,000 (family of 4)
Due diligence, main applicant	USD 10,000	USD 8,500
Due diligence, each dependent 16+	USD 7,500	varies by age, approx USD 2,000 to USD 5,000
Passport fee per person	approx USD 361	approx USD 300
Realistic all-in, single	approx USD 261,000	approx USD 259,000
Realistic all-in, family of 4	approx USD 290,000 to 300,000	approx USD 270,000 to 280,000
Processing time	4 to 6 months	6 to 14 months
Mandatory interview	Yes, applicants 16+	Yes, applicants 18+
Physical presence	None	5 days in first 5 years
Passport visa-free access	approx 156 to 162 destinations	approx 150 to 165 destinations

The pattern is clear. For a single applicant the two programs land within a few thousand dollars of each other, because Antigua’s lower contribution is partly eaten by its flat USD 20,000 processing fee. For a family of four, Antigua pulls meaningfully ahead, typically USD 20,000 to USD 25,000 cheaper all-in, because the family is bundled into one contribution and the per-head due diligence is lower. That family-of-four advantage is the single most important fact in this comparison, and it is why Antigua has historically been the value pick for larger families.

A note on the headline floors. Both countries sit on the regional CARICOM minimum of USD 200,000 agreed across the Eastern Caribbean. St Kitts and Antigua both chose to price above that floor, St Kitts at 250 and Antigua at 230, so neither is selling at the regulatory minimum. Treat any agent quoting below these numbers with suspicion.

Processing and the road to the passport

St Kitts is faster and more predictable. Expect citizenship in roughly 4 to 6 months under the current process, with a due diligence phase of three to four months. Antigua has historically been quick too, but real-world timelines in 2026 have stretched, with some applications running 6 to 14 months as the new regional regulator beds in. If speed matters, St Kitts has the edge.

Both now require a mandatory interview, a 2024 reform. St Kitts interviews applicants aged 16 and over, Antigua those 18 and over, conducted in person or by secure video. Both require an oath or affirmation of allegiance, reflecting that each is a Commonwealth realm under King Charles III. Both have rolled out biometric data collection, with St Kitts requiring enrolment for existing and in-process citizens by mid-2027.

The passport and access

The two passports are close to a tie. Both deliver visa-free or visa-on-arrival access to roughly 150 to 165 destinations, including the United Kingdom, the Schengen Area, Singapore, and Hong Kong. Published index numbers vary by source and by month, so do not over-weight a five-destination difference in a headline. Neither passport currently offers visa-free access to the United States, and both have faced heightened EU scrutiny over Schengen visa-free status, a watch item for any Caribbean program in 2026. St Kitts carries slightly more institutional recognition simply because it is the oldest program, which can matter at banking and account-opening stages.

Tax

Neither country taxes worldwide income, and neither imposes personal income tax, inheritance tax, or capital gains tax on non-residents who do not live there. Citizenship alone does not make you tax resident in either place, and it does not change your tax position at home. Where you actually owe tax depends on residency and your home country’s rules. Coordinate any tax planning with qualified counsel in your own jurisdiction before you rely on a Caribbean passport for tax purposes. This is not personal tax advice.

The one real lifestyle difference: Antigua’s 5-day rule

This is the deciding factor for some readers. Antigua and Barbuda requires you to spend at least 5 days physically in the country during your first 5 years of citizenship to keep your passport renewable. It is a light requirement, a single short visit satisfies it, but it is a requirement, and there is active discussion of raising it to 30 days under the regional reforms. St Kitts and Nevis imposes no physical presence requirement at all, ever. If you want a passport you may never need to set foot in to maintain, St Kitts is the cleaner answer. If a one-time five-day trip to a Caribbean island is no hardship, the rule is trivial and the cost saving wins.

Who each one suits

Choose Antigua and Barbuda if you are applying as a family of four or more and want the lowest realistic all-in cost, and a short qualifying visit does not bother you. The family bundling and lower per-head fees make it the value leader for households.

Choose St Kitts and Nevis if you want the fastest, most predictable process, zero presence obligation, and the reassurance of the oldest and most recognized Caribbean program, and you are willing to pay a modest premium for it. Single applicants and very small families will find the price gap negligible, which tilts the decision toward St Kitts on pedigree and speed.

For most single applicants, this is close enough that brand and processing speed should decide it, and that favors St Kitts. For most families of four, the money decides it, and that favors Antigua. Verify the current fee schedule with a licensed agent before committing, because the regional rules are still moving in 2026.