How to track your spending in Spain

Spain is one of the few places where standard personal finance advice applies almost as written: a single currency, stable prices, and open banking that genuinely works. That changes what's worth doing.

Here the problem isn't reconstructing information that doesn't exist. It's the opposite: there's too much of it, and it's disorganised.

PSD2 exists, and it still isn't enough

European regulation requires banks to expose your transactions through APIs, and the apps that connect to them work. That's a real advantage over half of Latin America.

What the connection still doesn't solve is the same as everywhere, and it's worth knowing before assuming that connecting the bank finishes the job:

• Cash doesn't show up. An ATM withdrawal is one line; the six expenses it turned into are none.
• The merchant sets your category. What arrives is the registered business name, which often looks nothing like the place's actual name, and it lands wherever the algorithm guesses. You correct it either way.
• A shared expense arrives entirely as yours. You paid for dinner for six: the bank reports the full amount, and only you know that five sixths of it isn't yours.

The sensible approach here is to use the connection if it helps and still keep a place where you do the classifying. The detail is in tracking without connecting a bank.

Bizum: convenient, and the biggest hole in your records

Bizum gets used for everything informal — dinner, a joint gift, the weekend rental — which is exactly why it's where personal and shared spending get most tangled.

Two rules that sort it out:

A Bizum you're paid back is not income. If you paid €120 for dinner and get €100 back, your expense was €20. Logging it as a €120 expense and €100 of income inflates both columns and ruins the category average.

A Bizum to a friend isn't your expense if it's their share. It's a settlement.

Both are solved by tracking shared money as shared — with a balance — rather than as loose expenses and income. It's in shared expenses, and for the flat you share, in splitting with roommates.

If you're autónomo

Two things that are quite different from the rest of the region:

The monthly social security fee is a predictable fixed cost. It goes in as recurring, like rent. It isn't a monthly surprise.

Quarterly VAT does surprise people, and shouldn't. It's the most expensive mistake in self-employment here: the VAT you charged sits in your account and looks like yours for three months. It isn't. Set it aside every time you invoice, not as the quarter approaches. The mechanics are in irregular income, and the account split in separating personal and work expenses.

The advantage of stable prices

It's real and worth using: here a budget built on three months of data holds for a year, not for a quarter. You can recalculate once or twice a year instead of every three months.

That makes the 50/30/20 rule work better than in much of the region. With one caveat: in Madrid or Barcelona rent alone can take a large share of the 50% for needs, and there the rule goes back to being a structure rather than a target.

In one line

Use the bank connection if it helps, but do your own classifying and don't leave cash out; track shared Bizums as a balance rather than as expenses and income; and set VAT aside every time you invoice, not when the quarter arrives.

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Shared expenses with no cap, 60+ currencies, and the numbers explained.