Summ Review (Formerly CryptoTaxCalculator)

Summ is best for multi-asset or high-volume traders

Because it integrates with so many platforms, Summ may be ideal for investors who trade using multiple exchanges, wallets and on-chain protocols. It also supports complex transactions like DeFi activity, NFTs and high-frequency trades.

What’s more, if you’re behind on your taxes, Summ supports unlimited tax years — meaning you can easily catch up on past-due filings. If your trading activity spans the crypto ecosystem and generates thousands of transactions, Summ can help streamline your tax reporting.

Summ’s plans

Summ offers a free trial that allows you to import your transactions and access basic features, including:

• Smart suggestion and auto-categorization engine
• Portfolio tracking
• DeFi and NFT support

However, if you’d like to generate tax reports (that’s probably what you need, after all), you must sign up for a paid plan.

What we like about Summ

Summ positions itself as software for serious crypto traders. Here’s where it stands out.

• Thousands of integrations. Summ offers over 3,500 integrations, beating out many competitors by a mile, including CoinLedger and CoinTracker, which both top out at around 500–600.
• Extensive data support. Summ can import data from exchanges, wallets and blockchains, and supports DeFi activity, staking, airdrops and other complex transactions.
• Top-tier customer service. Customer feedback for Summ consistently praises its customer support reps, who are expertly trained to resolve issues quickly.
• Generates detailed, accountant-friendly reports. Users can export tax reports compliant with IRS-standard forms — like Form 8949 and Schedule D — and share them with accountants or software like TurboTax.
• Smart categorization and automation. The platform provides automated suggestions and categorization for imported data, reducing manual work when classifying complex transactions.
• Backed by reputable investors. The company has funding from notable investors like Coinbase Ventures and AirTree, which signals institutional confidence in the product’s development and longevity.
• Up-to-date resource center. Many crypto companies leave their educational resources untouched for years, but Summ regularly publishes new guides, with several new articles already live in 2026.
• Unlimited tax year support. Need to catch up on your crypto taxes? Summ generates reports for as many prior tax years as you need, so you’re never stuck trying to piece together your old trading activity.
• Official tax partner of major platforms. Summ is the official tax partner of Coinbase and MetaMask, which says a lot about its credibility and integration within the crypto ecosystem.

Where Summ falls short

While Summ has a lot to offer, there are a few drawbacks to consider before signing up.

• No free tax reports. While Summ offers a free plan, tax reporting and some advanced features only unlock with a paid plan.
• Not beginner-friendly. Some users claim that the interface can be confusing for newer traders, especially when reconciling a high volume of transactions or learning the workflow for the first time.
• Limited value for low-volume traders. While Summ’s higher-tier plans are competitive, other platforms, like Koinly, offer more advanced features on their entry plans for roughly the same cost.

Is Summ legit?

Summ is headquartered in Sydney, Australia, and was first founded in 2018 as CryptoTaxCalculator (CTC). In 2025, it rebranded as Summ — a short form of the word summation, representing a sum of all parts.⁽¹⁾

Summ partners with major crypto exchanges, including Coinbase and Binance, and works with tax software brands like TurboTax. It supports DeFi, NFTs, and over 300,000 cryptocurrencies and integrates with over 3,500 exchanges, wallets, and more to generate tax reports for its users.

As of the time of writing, we cannot find any news reports of a breach, hack or lawsuit against Summ, which is a rare find in the crypto space.

However, while Summ can integrate with your crypto trading and generate tax reports, it’s always up to you to ensure your taxes are properly reported.

How to sign up for Summ

Signing up for Summ is a straightforward process, but how many steps it takes depends on whether you want access to tax reports.

1. Create a Summ account with your email, crypto wallet, exchange account or Apple ID. You do not need to provide a credit card or payment method up front.
2. Select your country.
3. Connect and sync your wallets or exchange accounts. From here, you can use Summ as an overview dashboard of all your accounts in one place.
4. Choose a paid plan if you want to generate tax reports.
5. Submit your payment method.

Customer experience

Summ’s Better Business Bureau (BBB) page is pretty empty — no reviews, one complaint and a B+ rating based on its length of operations. However, its Trustpilot page is more robust. Nearly 700 reviews rate it 4.6 out of 5 stars, with over 91% of customers giving it the highest possible rating.

Positive reviews praise the easy integration and customer service. In fact, most positive reviews highlight how helpful and speedy its representatives are at resolving issues. Negative reviews claim the software is a bit expensive and that the UI is overly complicated.

Sentiment is similar on Reddit. Users there say it’s easy to generate the right tax reports and that customer service is provided by human experts who resolve problems quickly. Most of the “complaints” are about the limitations of crypto exchanges in providing the correct information to the software, not Summ itself.

Compare Summ to other platforms

Compare similar platforms by starting price, transaction limit and supported exchanges. SelectGo to site to sign up for an account.

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Starting price	Transaction limit	Supported exchanges	Automatic generated tax forms
Accointing	$49	100 to 50,000	284 exchanges	IRS Form 8949	View details Compare product selection Compare	loading
E-file	$20.99			Form 1040	View details Compare product selection Compare	loading
TaxSlayer	$22.95			Schedule 1, Form 1099, IRS Form 8949, Schedule D, Schedule C, Schedule SE, Form 1040	Go to site View details Compare product selection Compare	loading
Crypto Tax Calculator	$49	100 to 100,000	Over 500 integrations	Schedule 1, IRS Form 8949	View details Compare product selection Compare	loading
ZenLedger	$0	Unlimited	400+ exchanges	Schedule 1, IRS Form 8949, Tax Loss Harvesting, Schedule D	View details Compare product selection Compare	loading

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