Ana has invested 40,000 € in equipment and ends September with 7,500 € of VAT in her favour. She cannot ask for an ordinary quarterly refund in Q3: during the first three quarters any excess is left to be carried forward (in Spanish, "a compensar"). In the Modelo 303 for the fourth quarter she can choose between carrying it forward again or asking for a refund. The annual refund is claimed in that 303 for the last period, not through Modelo 390.
Carrying forward means using the balance later
When deductible input VAT exceeds the VAT you charged, the result is negative. If you tick "to be carried forward", the balance remains available to reduce positive results in later periods. It is neither an expense nor an automatic refund to your bank.
Example: in Q2 you build up 2,400 € in your favour. In Q3 the return, before offsetting, shows 1,500 € to pay. By applying part of the balance you pay nothing and 900 € remains pending. The trail must appear correctly in the boxes for amounts to be offset, applied and pending.
| Option | Effect | When it usually makes sense |
|---|---|---|
| Carry forward | Reduces future positive 303 returns | You expect to charge VAT soon |
| Annual refund | You ask for a bank payment | A stable balance and little VAT due in future |
| REDEME | Lets you claim monthly | Recurring balances and cash flow that matters |
Carrying forward avoids waiting for a refund and keeps things simple if the next quarter will be positive. But keeping for years a balance you never use up ties money down and means watching the legal time limit for exercising the right.
You can send the four 303 returns and the books through the self-employed form. The comparison has to be made on reconciled balances: if part of the credit comes from defective invoices or expenses with no right of deduction, it is not cash you can recover.
The annual refund is claimed in the 303
In the last period of the year (Q4 for those who file quarterly, month 12 for those who file monthly) you can ask for the excess to be refunded. You must tick the corresponding result and give an account held in an appropriate name. Modelo 390 summarises the year when it is compulsory, but it is not the channel that generates the claim.
Hacienda, the Spanish tax office, may check the refund before paying it. It commonly asks for the record books, purchase invoices, an explanation of the activity and evidence that the expenses serve transactions that carry a right of deduction. A large negative figure caused by investment is not irregular, but it has to be well documented.
If you claim a refund and then try to use the same balance to offset, you are doubling the right. That is why the close must reconcile what was claimed, what was applied and what is still pending.
Building a refund claim that holds up
Before ticking "to be refunded", generate the book of invoices received and link each significant amount of VAT to its invoice. Separate capital goods, ordinary expenses, imports, intra-Community acquisitions and reverse-charge transactions. Check that the supplier, tax number, date, base and VAT match.
Then connect those expenses with sales that are subject to VAT and not exempt. If you carry out exempt transactions or run separate sectors of activity, the pro rata rule may limit the amount. A formally correct invoice gives no right of deduction if the asset is used privately or for transactions without that right.
Ana, for instance, should keep the invoices for the equipment, proof of payment, contracts or orders that explain what it was bought for, and the date it was put into use. If the equipment counts as capital goods, later adjustments will also have to be followed.
Carrying forward does not avoid a later check
There is a belief that Hacienda only looks when money is claimed. A large refund can trigger an immediate check, but a balance carried forward is also examined when it reduces future tax. The documentation must be the same in both cases.
If you apply 7,500 € over several quarters and a later check rejects 2,000 €, the result can be unpaid tax, interest and, depending on the case, a penalty. Choosing to carry forward does not cure an incorrect deduction.
Track the time limit by origin
The right to offset should not be managed as a pot with no date. It is worth keeping a matrix by period: balance generated, applied, claimed and pending. That way you can see which part is getting close to the time limit and avoid carrying forward amounts that the software may still show but which already need specific analysis.
| Period of origin | Generated | Applied later | Pending |
|---|---|---|---|
| Q2 2025 | 3,000 € | 2,200 € | 800 € |
| Q3 2025 | 4,500 € | 1,000 € | 3,500 € |
The 303 shows aggregated balances, but your internal file must let you rebuild their age. A change of adviser or software is no excuse for losing that history.
Once the refund has been claimed
Keep the receipt and watch for electronic requests. Hacienda may ask for books or invoices and give you a deadline to answer; not replying can delay or reduce the refund. If the amount paid differs from the amount claimed, review the assessment and the deadlines to appeal before booking the difference as a loss.
When the refund reaches the bank, it is not income from the activity for profit purposes: it recovers a VAT balance. Record it against the relevant tax account so as not to inflate sales or distort Modelo 130, the quarterly income tax payment.
If part of the balance was the subject of an earlier check, keep the decision with the matrix. That way you avoid including rejected VAT again, or losing accepted adjustments, when the data moves to the next year.
What waiting really costs
Suppose you end Q3 with 12,000 € in your favour and expect to pay 2,000 € a quarter next year. If you carry it forward, you will recover the balance in economic terms by not paying for six quarters. If you claim it in Q4, you may get the cash sooner, although processing and a possible check take time.
The decision does not depend on the amount alone. Weigh up:
- expected sales and future VAT charged;
- investments that will keep generating negative balances;
- the need for financing and what it costs;
- the quality of your invoices and books;
- exempt transactions or a pro rata that limit the deduction;
- how old the balances are.
Before claiming, check that the VAT really is deductible. The treatment of a car, for example, requires separating the VAT presumption from the income tax criterion, as we explain in deducting the car.
REDEME: a refund every month in exchange for more obligations
The Registro de Devolución Mensual (REDEME), the monthly refund register, lets you claim the balance at the end of each month without waiting for December. It can be useful for exporters, heavy investment or businesses that systematically bear more VAT than they charge.
It is not a box that switches on when a one-off refund appears. It requires registering within the deadlines, filing monthly returns and keeping the books through the Suministro Inmediato de Información (SII), the immediate electronic supply of invoice records. That burden may not be worth it for an occasional small balance.
If you already chose the wrong option
If you ticked carry forward when you wanted a refund, or the other way round, the correction depends on timing. If the filing period has not yet ended, the correction can be requested under the procedure for the form. Once the period has ended, the scope for changing the option is narrower and should be analysed before filing another 303.
Do not confuse a balance carried forward with a return showing no activity. If you have paid VAT on purchases, see why the 303 is not a nil return. Nor should you confuse a client's failure to pay with input VAT: for the first there is a procedure for recovering VAT on bad debts.
At Salama Tax we can reconcile the balance and compare the time it takes to use it up against the annual refund or REDEME.