IRPF / IS
Mining: the right tax classification from day one
“We determine whether your activity qualifies as a business activity, how to declare the income and how to document your operations.”
Crypto Mining Tax in Spain
Legal advice on crypto mining tax for individuals and companies. We analyze your case to establish the correct tax classification under personal income tax (IRPF) or corporate income tax (IS), the VAT (IVA) treatment where applicable, the valuation of rewards, the deductibility of expenses (electricity, equipment, depreciation) and the documentary traceability you need to respond to the Spanish Tax Agency (Hacienda). If you have already mined and need to put previous tax years in order, we give you a regularization plan.
Expenses
Deductible expenses and equipment depreciation
“We organize electricity, hardware, maintenance and depreciation using defensible criteria and evidence.”
Valuation
How to value rewards and transactions
“We set the valuation method, dates and records to avoid inconsistencies in gains and losses.”
Regularization
A plan for previous tax years
“If you have already mined without declaring it, we propose a regularization and supporting documents to reduce your risk.”
What we review in crypto mining tax
Business activity or another type of income?
We determine how mining is taxed in your case: registration, obligations, books and records, and the criteria for allocating income to each tax period.
VAT and related services
We analyze whether or not the activity is subject to VAT and how to document your operations correctly to avoid errors in periodic returns.
Electricity, equipment and depreciation
We organize deductible expenses: power consumption, hardware, maintenance, cooling, rent and depreciation, with supporting documents.
Value of rewards and transactions
We set the valuation method, date/time, exchange rate and records so that income and future gains/losses reconcile.
Information returns and wealth tax
Where applicable, we review your reporting obligations (custody, balances, wallets, exchanges) and how to prepare documents for a tax audit.
Regularization and defense
If you have already mined without declaring it, we design a year-by-year regularization, rebuilding the data, with a strategy to reduce your risk.
Timing and record-keeping for crypto mining
In crypto mining tax, what matters most is consistency: when rewards are obtained, how they are valued, which expenses are deducted and what evidence proves it. Without this, any review gets complicated.
Reward log: date, asset, amount and value in euros (price source) at the time each reward is obtained.
Expenses and invoices: electricity, hardware and ancillary services, with receipts and allocation criteria.
Depreciation: a depreciation schedule and evidence of the equipment’s acquisition cost.
Wallets and exchanges: traceability of addresses, transactions and conversions so that balances and returns reconcile.
Regularization: if tax years are missing, we rebuild the data and propose a plan organized by year.
Crypto and compliance: tax + risk prevention
In crypto mining projects, tax obligations often overlap with requests for traceability and source of funds when dealing with banks or third parties. We help you prepare consistent documents to answer these requests and reduce friction.
Scope of the tax review: what will we check?
We review your mining operations, the traceability of rewards and transactions, and the support for your expenses, to build a consistent and defensible tax position.
1. Records and evidence
We audit traceability: wallets, pools, exchanges, dates obtained, valuations and conversions. Goal: reconcile income, balances and supporting documents.
2. Calculation and valuation
We set the valuation method and allocation criteria. We calculate income, any gains or losses, and consistency across tax years.
3. Tax plan and regularization
We design the strategy: obligations, forms and calendar. If any tax years are outstanding, we propose a regularization and supporting documents.
Occasional mining or a structured activity?
Crypto mining tax varies a lot depending on volume, continuity and the resources used. Classifying your situation correctly avoids inconsistent returns and nasty surprises in a tax review.
| Aspect | Occasional Mining | Mining as a Business Activity |
|---|---|---|
| Operations | Low frequency or limited volume; minor resources. | Continuity, structure, investment in equipment and organization. |
| Obligations | Filing and supporting documents according to the criteria that apply to the case. | Higher documentation standard: records, expenses, depreciation and year-to-year consistency. |
| Expenses | Case-by-case review, avoiding unsupported allocations. | Electricity, equipment, services and depreciation, with criteria and evidence. |
| Risk in a review | Valuation errors and lack of traceability. | Inconsistencies between income, expenses and balances; missing records and documents. |
*The classification depends on facts and evidence: continuity, resources, volume and organization. An individual analysis is recommended.
How we handle your crypto mining tax
A clear method: data collection, rebuilding traceability, calculation, tax position and preparing documents for possible tax reviews.
01
Data collection and source map
We identify wallets, pools, exchanges and periods. We define what data is needed and how to extract it consistently.
02
Reconstruction and valuation
We reconcile rewards, transactions and conversions. We set the valuation method and check year-to-year consistency.
03
Expenses and depreciation
We organize invoices, the allocation of electricity costs and the hardware depreciation schedule, avoiding weak, unsupported criteria.
04
Filing or regularization plan
We deliver the calculation, the tax position and the documents. If any tax years are outstanding, we propose a phased regularization with supporting evidence.
Operational checklist
Key evidence to report crypto mining without surprises
Crypto tax cases are won with evidence: complete records, consistent valuation and well-supported expenses. This is what the Tax Agency usually asks for if it reviews your case.
Identified wallets
Consistent valuation
Supported expenses
Annual reconciliation
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Reward log
Date, asset, amount and value in euros (price source) at the exact time each reward is obtained.
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Transaction traceability
Transfers between wallets, pools and exchanges, with hashes/IDs and balance reconciliation.
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Invoices and expenses
Electricity, hardware, repairs, cooling and services. Avoid unsupported estimates.
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Hardware depreciation
Acquisition cost and depreciation schedule to support deductions consistently.
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Annual consistency report
Reconciliation of income, conversions and balances, with documents ready for a tax review.
Common mistakes in crypto mining tax
What complicates a tax review is usually missing records and inconsistency between income, balances and expenses. This is what we usually fix.
⚠️
No wallet traceability
Being unable to link addresses, pools and transactions to a consistent annual record. Without this, it is hard to defend the figures.
⚠️
Inconsistent valuation
Using different prices with no consistent criterion or no date/time. This causes mismatches in income and future gains/losses.
⚠️
Unsupported expenses
Electricity or hardware with no invoices or no allocation criteria. This is the first point of conflict in a review.
⚠️
Not depreciating (or depreciating incorrectly)
Equipment with no depreciation schedule or with the wrong criteria. This directly affects the tax base.
What the Tax Agency usually checks in crypto mining
To avoid problems, you need consistency: records, valuation, expenses and supporting documents. Without them, the review stalls.
Records
Valuation
Expenses
Reconciliation
Records and traceability
- Identified wallets linked to your operations.
- Rewards with date, amount and value in euros.
- Transactions with hashes/IDs and balance reconciliation.
- Documented sources (pool/exchange).
Without traceability, the risk is not only tax-related: it is also reputational and banking-related.
Valuation and year-to-year consistency
- A stable, justifiable valuation method.
- Valuation date/time at the moment of receipt.
- Consistency between declared income and balances.
- Conversions and sales with complete records.
Quality tip
Using a single price source and a fixed criterion avoids “discovering” mismatches late.
Expenses and depreciation
- Invoices and receipts (electricity, hardware, services).
- Reasonable, documented allocation of power consumption.
- Hardware depreciation with a schedule and proven cost.
- Separation of personal and business expenses.
What is not supported usually does not hold up in a review.
Orderly regularization
- Year-by-year reconstruction with complete data.
- Correction of valuation errors and misclassification.
- Documents prepared for a tax review.
Regularizing properly reduces your exposure and avoids rushed decisions.
Important note:
Request a review of your case
If you have already mined without declaring it, the worst thing you can do is improvise. The right approach is to rebuild the data, set a criterion and regularize with supporting documents.
Risks if your mining taxes are not in order
Tax reviews triggered by inconsistencies between income, balances and transactions.
Regularizations with surcharges and interest if tax years are missing or there are significant errors.
Reputational and banking risk: account blocks or source-of-funds requests you cannot document.
Expenses rejected for lack of invoices, allocation criteria or proper depreciation.
High cost of reacting: rebuilding data late is harder than keeping good records from the start.
Need to put your crypto mining taxes in order?
We help you set your criteria, rebuild data, support expenses and prepare documents you can defend in a tax review.
Everything about crypto mining tax
How is crypto mining taxed?
Crypto mining tax depends on your situation: volume, continuity and the resources used. The key is to set your criteria and back them up with records and evidence.
We help you determine the treatment under IRPF or corporate income tax and prepare the necessary documents.
The worst thing is to mix criteria or file without traceability: it is the number one cause of mismatches.
What value is used to declare rewards?
The key is to set a consistent method: date/time of receipt, price source and conversion to euros. It must be documented.
A stable criterion avoids inconsistencies between income, balances and future gains/losses.
Can I deduct electricity and equipment?
It is reviewed case by case. What matters is how your operations are classified and the supporting documents: invoices, allocation and depreciation.
Without invoices and allocation criteria, expenses often do not hold up.
What if I have already mined and did not declare it?
You can regularize in an orderly way: year-by-year reconstruction, consistent valuation and support for expenses and transactions.
Improvising is usually costly: it is best done with data, criteria and documents.
What documents should I prepare?
Wallets, pools, exchanges, CSV files/histories, hashes, price source, electricity and hardware invoices, and the depreciation schedule.
The more complete your records, the more defensible your return in a tax review.
How much does the service cost?
It depends on the number of wallets, years, transaction volume and whether data needs to be rebuilt. The price reflects the actual complexity.
We give you a quote after a quick assessment of the volume and data sources.
Related contracts
Other contract resources you may also find useful
If you are researching this topic, these pages can help you broaden your analysis of confidentiality, mandate, commission and commercial distribution.
Confidentiality
Non-disclosure agreement
Review the essential clauses to protect sensitive information, define obligations and reduce risks in negotiations or collaborations.
View page MandateMandate agreement
A useful resource to understand representation, the scope of the engagement, the agent’s duties and the responsibilities between the parties.
View page CommissionCommission agreement
Analyze the legal structure of commercial intermediation, acting on behalf of another party and the obligations arising from the agreement.
View page DistributionDistribution agreement: template and key points
See a practical outline for regulating supply, territory, exclusivity, term and grounds for termination in commercial relationships.
View pageBook a call
Official sources
Key legislation, linked to the official text:
- Law 35/2006 of November 28 on Personal Income TaxBOE · consolidated text
- Law 58/2003 of December 17, General Tax LawBOE · consolidated text
Legislation and links reviewed in .