Every year, during tax season, millions of investors open their tax summary and find a number they weren't expecting. Sometimes in their favour. Often not. And in most cases, the reason is the same: they didn't know exactly which investments they were supposed to declare.
Your tax return isn't just about employment income. If you have money invested — even in a modest index fund or a handful of shares — there are things the tax authority expects you to report. Some appear automatically in pre-filled forms. Others don't.
The two categories that confuse most people
Tax systems generally split investment income into two buckets, and mixing them up is the most common mistake:
Income from capital (interest and dividends):
- Dividends from stocks and shares
- Interest from savings accounts, bonds, or fixed deposits
- Coupon payments from fixed income
- Returns from certain insurance savings products
Capital gains and losses:
- Selling shares (the difference between what you paid and what you received)
- Redeeming investment funds or ETFs
- Selling cryptocurrency
- Real estate crowdfunding when you receive a return on your capital
The distinction matters because both are taxed differently, and the rules for offsetting losses against gains vary between them.
What you always need to declare
Dividends and interest
If a stock you hold paid dividends during the year, those dividends are taxable income. The same applies to interest from savings accounts, term deposits, or corporate bonds.
Most domestic banks and brokers apply withholding tax at source and report it automatically. But if your broker or bank is based abroad, that withholding may not appear in your pre-filled return. You'll need to add it manually.
Gains from funds, ETFs, and shares
Every time you sell an investment at a profit, you realise a capital gain. Tax is due on the difference between your sale price and your purchase price, including commissions on both sides.
One rule that catches many people out: switching between funds counts as a sale. Moving from one fund to another, even within the same platform, is a taxable event in most jurisdictions. The same applies to crypto-to-crypto swaps.
If you also have losses, they can often offset your gains. And if your losses exceed your gains, many tax systems let you carry them forward for several years. Most investors don't take advantage of this simply because they don't have the records.
Cryptocurrency
Every sale, swap, or conversion of crypto is a taxable event. It doesn't matter whether you sold to fiat or swapped Bitcoin for Ethereum: the moment you exit a position, you've realised a gain or loss.
What's not taxable: just holding crypto. As long as you don't sell or exchange it, there's no realised gain to declare.
Many countries now have specific reporting requirements for large crypto holdings kept on foreign exchanges. Check whether you need to file a separate informational form — failing to do so can result in significant penalties even if no tax is owed.
What most people forget
Foreign accounts and assets
If you hold accounts, shares, or any financial assets abroad above a certain threshold, you may be required to declare them on a separate informational form — even if you owe no additional tax. These declarations are often overlooked precisely because they don't trigger a payment, but the penalties for missing them can be severe.
Real estate crowdfunding and peer-to-peer lending
Platforms generating returns through property investments or loans create taxable income. Depending on the structure — equity participation vs. loan — the returns may be classified as capital gains or income from capital.
Many of these platforms have limited or no reporting obligations to tax authorities. Your pre-filled return will likely be blank in this section. The responsibility to include it is yours.
Pension withdrawals
If you withdrew from a pension or retirement account during the year, that money typically doesn't receive the same favourable tax treatment as investment gains. In many systems, pension withdrawals are taxed as employment income, which can push you into a higher bracket and affect your overall rate. It's one of the most financially significant decisions many people make without modelling the tax impact first.
Life and savings insurance products
Certain insurance-linked savings products have their own tax treatment, sometimes with advantageous rates if you meet specific holding periods. If you redeemed one during the year, it's worth checking how it should be classified before assuming it works like a regular investment.
Why your pre-filled return isn't enough
Pre-filled tax returns pull in data that third parties have reported: domestic banks, local brokers, platforms with mandatory reporting obligations. But there are common situations where that data doesn't arrive or arrives incomplete:
- Foreign brokers (Interactive Brokers, Trading 212, eToro, etc.)
- Crypto exchanges headquartered outside your country
- Crowdfunding platforms without mandatory reporting obligations
- Investments held through overseas accounts
In all these cases, it's your responsibility to include the information. The pre-filled form won't flag what's missing.
How to stay on top of it without the annual headache
The problem most investors face isn't a lack of willingness to declare correctly. It's not having the data organised when the time comes. Searching for purchase prices from three years ago across emails, exchange transaction histories, and PDFs from different brokers is exactly as painful as it sounds — and entirely avoidable.
What actually makes the difference:
- Record each investment when you make it, not when you have to declare it: asset type, date, purchase price, quantity, platform.
- Log every sale as it happens: sale price, commissions, resulting gain or loss.
- Keep everything in one place, regardless of where the asset is actually held.
If you have this information ready in January, tax season becomes a thirty-minute review rather than a day of digital archaeology.
LeVaultly as your starting point
In LeVaultly you can log each investment with its type, name, ticker, broker, quantity, and current value. It's not a tax tool and it's not a substitute for a tax adviser — but it is the place where your entire portfolio is visible at a glance, across every platform and broker you use.
When next tax season arrives, instead of opening four apps and digging through old emails, you'll open LeVaultly and have the complete picture: what you hold, what you sold during the year, and where everything is.