Published verdictRanking snapshot 3 November 2026
Koinly leads by 4 points
Koinly scores 4 points above Summ (formerly Crypto Tax Calculator), led by record portability.
Koinly #1 of 1181SUSumm (formerly Crypto Tax Calculator) #5 of 1177
Scores are out of 100; published scores fall within 41–99; a bar is empty at 41 and full at 99.Why, term by termKoinly leads on 1 of 4 published criteria; Summ (formerly Crypto Tax Calculator) on 1. The terms sum to the gap.
TermKoinlySumm (formerly Crypto Tax Calculator)WeightPoints
Complex transactions8/109/105.3−1.4for Summ (formerly Crypto Tax Calculator)−0.7 of 32
Record portability8/104/104.8+5.0for Koinly+2.6 of 32
Net of the terms+3.6
Reproduced gap+3.6
Published gapAfter score rounding and bounds — see the note below8177+4.0
Weight is in points of the 86-point weighted total. Points are score points of the gap between the two.
- Koinly's lead rests on lighter criteria: Summ (formerly Crypto Tax Calculator) is ahead on complex transactions, which carries more weight (22) than any criterion Koinly leads on (20).
KoinlyScore 81Names ten statutory forms across ten jurisdictions and ships Sweden's K4 in Skatteverket SRU upload format, but has no German form on any served page, supports only one of Rev. Proc. 2024-28's two allocation methods by its own admission, charges a per-country add-on to file in two places, and puts its 10-year report-access promise in the help centre while the contract reserves the right to delete inactive accounts with no refund.Strength: Named form output — 8/10Watch-out: Two, and the first costs money before it costs time. US buyers: paying does not by itself produce a filled 8949. "USA-specific reports like Schedule D and form 8949 require the 1099-DA flow to be completed. Without the information if you received the 1099-DA form or not, some of the fields cannot be filled." and "If you didn't complete the 1099-DA flow and download reports, some of them will be empty (1kb PDFs)" (https://support.koinly.io/en/articles/13791356-usa-uploading-1099-da-forms-to-koinly, re-loaded 2026-08-19). Now read that against the contract: "Refunds are not possible once you have downloaded any reports and must be made within 7 days of purchase. The refund reason must be related to a bug/issue within Koinly that we are unable to resolve within reasonable time." (https://koinly.io/legal/terms/, reached from https://koinly.io/terms/, loaded 2026-08-19, "Revised on Jan 2, 2026"). Downloading the empty 1kb PDF is itself the act that extinguishes the refund. Second: German and Austrian buyers get NO statutory form. The pricing FAQ names Germany among countries with "specialised tax reports" (https://koinly.io/pricing/), but the help centre's Localized Tax Reports list has no German entry — Germany appears only as a report LANGUAGE, and the countries article routes German filers to the generic artefact ("Our Comprehensive Tax Report is suitable for anyone looking to declare taxes - no matter which country.", https://support.koinly.io/en/articles/9489962-which-countries-does-koinly-calculate-taxes-for). No Anlage SO, no ELSTER handoff, no Austrian E1/E1kv and no FinanzOnline appears on any page loaded. A German filer pays for a Complete Tax Report written in German and transcribes it. And anyone filing in two countries pays the "Dual nationality" add-on again for each extra country, each tax year. THIRD, added in verification: the help centre's "Each yearly plan is valid for 10 years from the date of purchase" has no counterpart in the contract, which reserves the right to terminate "without any prior notice" on grounds including "Any extended periods of inactivity;", to delete "any and all related information, files, and any such content that may be associated with or inside your account, or any part thereof;", and states "If your account is terminated by Us, you will not be entitled to any refund of any monies spent on Koinly." A buyer who pays for a tax year and comes back in year four is relying on a help article, not on a term.Summ (formerly Crypto Tax Calculator)Score 77Produces real IRS Form 8949 / Schedule D / Schedule 1 PDFs autofilled with the filer's SSN, publishes a per-jurisdiction binding-method table with a documented Rev. Proc. 2024-28 migration, and documents all six awkward cases with product mechanisms — then rents the whole record back to you, because the terms grant access 'only for the duration that you continue to pay' and the only documented backup route itself requires an active subscription.Strength: Awkward case treatment — 9/10Watch-out: Three compounding surprises, all landing after the card is charged. (1) YOUR REPORTS ARE RENTED — THOUGH YOUR DATA IS NOT DELETED. Terms clause 5.2: "For recurring services, we grant you and your Authorised Users a right to access the relevant Services only for the duration that you continue to pay for the Service, subject to these Terms." The cancellation article is blunter: "Once your subscription expires, you will lose access to any paid features, including tax reports." Read the whole article, though, because the same page also says: "The data and integrations you have imported are retained and can still be reviewed on the Accounts and Transactions pages unless a refund is issued, which may result in their deletion." So the history stays visible; what dies is the ability to REGENERATE the filed report and to EXPORT anything. The documented escape hatch does not survive either: "Currently, the only way to back up your data in Summ (formerly Crypto Tax Calculator) is by exporting your Transaction report. This ensures you have a copy of your raw data outside the platform.", which requires an active subscription ("An active subscription is required to download reports for all years.") and whose nine columns carry no cost basis. Stop paying in year three and the 2025 return you already filed cannot be regenerated to defend an audit — even though you can still look at the transactions behind it. (2) AT $49 AND $99 YOU CANNOT CHANGE THE INVENTORY METHOD. The pricing page, fetched 2026-09-29, no longer names inventory methods by tier (the features that start at Investor ($249) are "Tax minimisation algorithm", "Tax loss harvesting", "Advanced reports" and "Audit report"), but the vendor's own pricing help article states the gate: "Additionally, tools like the Tax Loss Harvesting Tool, advanced inventory methods, and advanced reports are only available on Investor and Trader Plans." The US default is Highest In First Out, so a US filer on Rookie or Hobbyist is locked into HIFO — a method that materially changes the tax owed — and the fix costs $200 more rather than a settings click. (3) UK FILERS WITH DEFI FACE A ONE-WAY DOOR: "Please note that, currently, the Bridge and Swap categories are not supported if you choose HM Revenue and Customs as your inventory method. If you use other inventory methods (e.g., First In First Out or Average Cost), you can use these categories but will not be able to switch back to HM Revenue and Customs." The method that actually binds under UK law is unavailable to anyone who has bridged or swapped, and leaving it is irreversible. Worse, the escape is paywalled: "In Summ (formerly Crypto Tax Calculator), we provide three inventory methods if your country setting is the UK. The HM Revenue and Customs method is available for all paid subscriptions. We also provide the First In First Out and Average Cost inventory methods for users on the Investor and Trader plans." — so a UK filer on Rookie ($49) or Hobbyist ($99) has HMRC as their only method and therefore cannot use the Bridge or Swap categories at all. Lesser but real: the pricing page, fetched 2026-09-29, no longer lists smart contract transactions by tier, but the vendor's help centre puts them above the $49 tier: "Certain features, such as smart contract transactions, require a subscription to the Hobbyist Plan or higher."