Earn my first recurring customer
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Duty27
SaaS & Apps · built by James Frisch
Duty27 is a VAT calculation API for digital goods and services. Keep your Stripe account, keep your accountant, just get the VAT math right.
Where is the first-customer funnel breaking?
WHO THEY ARE TRYING TO REACHDevelopers and small engineering teams at SaaS and digital-product companies that sell to EU consumers and already run their own checkout (Stripe, Mollie, Klarna, or custom). They need correct per-country VAT on each sale, including B2B reverse-charge, but don't want a Merchant of Record taking a revenue cut.
PROBLEM IN CUSTOMER LANGUAGE"What VAT do I charge a customer in Germany vs France?" "Do I charge VAT if the buyer is a business with a VAT number?" "I crossed the €10,000 EU threshold, now what?" They sell digital products to EU buyers, and each country has its own rate, B2B sales follow different rules, and getting it wrong means owing tax out of their own pocket. They want the right VAT amount on every sale without learning EU tax law, and without handing a percentage of revenue to a Merchant of Record.
CURRENT OFFERGet a free API key (no credit card), send one API call with the country, date, and amount, and get back the correct VAT for that sale, including whether a validated business buyer qualifies for reverse charge. Plug it into the checkout you already run, with no change of payment processor and no revenue cut.
WHERE PEOPLE STOPCould not reach the target audience
What the founder has actually tried.
Each entry keeps the audience, offer, result and next move together so “no sales” can be diagnosed instead of guessed at.
Experiment 1Oct 2, 2026
Audience: Developers and small engineering teams at SaaS and digital-product companies that sell to EU consumers and already run their own checkout (Stripe, Mollie, Klarna, or custom). They need correct per-country VAT on each sale, including B2B reverse-charge, but don't want a Merchant of Record taking a revenue cut.
Offer: Get a free API key (no credit card), send one API call with the country, date, and amount, and get back the correct VAT for that sale, including whether a validated business buyer qualifies for reverse charge. Plug it into the checkout you already run, with no change of payment processor and no revenue cut.
Drop-off: Could not reach the target audience
Next: Message 10 developers who sell digital products to EU customers through their own checkout, with no link, and ask how they handle VAT today and what they do when a B2B buyer gives a VAT number. I'll look for the same words they use in my answers and note where they currently get stuck. Separately, I just put our OpenAPI spec and examples in a public GitHub repo and will watch whether signups come from it.
What is Duty27?
Duty27 is a VAT calculation API for digital goods and services. Keep your Stripe account, keep your accountant, just get the VAT math right.
From shipped to recurring revenue.
✓Built
✓Launched
First users
✓First experiment
First recurring customer
$100 MRR
$1K MRR
More SaaS & Apps founders.
Duty27: product, audience and early traction context.
Duty27 is listed in SkillChirp's SaaS & Apps category. This page documents the founder-reported stage, target customer (Developers and small engineering teams at SaaS and digital-product companies that sell to EU consumers and already run their own checkout (Stripe, Mollie, Klarna, or custom). They need correct per-country VAT on each sale, including B2B reverse-charge, but don't want a Merchant of Record taking a revenue cut.), current offer, traction bottleneck, experiments and progress toward recurring revenue. Club status is a discovery signal, not an investment recommendation or independent revenue verification.