How to track your spending in Uruguay

In Uruguay a lot of people live a month that happens in two currencies at once: rent and most of the big items are in dollars, while groceries, transport and daily life are in pesos.

Adding the two columns gives a number that doesn't exist. And picking one currency to view everything in is worse, because it means converting each expense in your head at a rate you half-remember.

The rule: log each expense in the currency you paid it in

It's counterintuitive, because the temptation is to normalise everything into pesos so you "know how much it is". The problem shows up a month later: if the conversion recalculates at today's rate, a closed month changes size every time you open it, and the history — the only thing that's useful for budgeting — stops being comparable.

What works:

• Log the amount in the currency you paid. 850 dollars of rent is logged as 850 dollars.
• Let the conversion lock to the day of the expense. It's a fact about the past, not an open question.
• Look at the total in whichever currency you think in, knowing it's a snapshot of that moment rather than an eternal truth.

The full reasoning is in tracking two currencies, and the mechanism in multi-currency.

Dollar expenses aren't really "fixed costs"

Rent of 850 dollars is fixed in dollars and variable in pesos. If your income is in pesos, that expense moves every month without you doing anything.

The practical consequence: the share of your income that goes to dollar-denominated costs is a number worth watching, and it's different from the amount. If it went from 35% to 41% in six months, that's the finding — the dollar figure didn't move.

It's worth reviewing quarterly, along with the rest of the budget. With this structure the 50/30/20 rule still helps, but the percentages get recalculated more often than in a single-currency country.

The VAT discount for paying by debit card

It's real money and it's easy to lose track of, because the discount appears afterwards rather than at the moment of paying.

Two ways to handle it, and both are fine as long as you're consistent:

1. Log the net amount — what it actually cost you — and forget the discount. It's the simplest and it reflects your month best.
2. Log the gross and the refund separately, if you want to be able to measure what came back over the year. It's more work and only worth it if you'll actually look at that number.

What doesn't work is mixing: some expenses net and some gross makes the category average meaningless.

The aguinaldo, twice a year

As elsewhere in the region, the trap is treating it as a good month. It's foreseeable income, and foreseeable income gets allocated before it arrives: expensive debt first, then the emergency fund, then the big expenses of the coming half-year, and whatever's left is spending.

In one line

Log each expense in its own currency and don't recalculate closed months, watch what share of your income goes to dollars rather than just the amount, be consistent about VAT refunds, and allocate the aguinaldo before it lands.

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