Digital invoices can be legally acceptable records, but there is no universal retention deadline. The rules depend on where you file taxes and what kind of transaction or record is involved. Keep invoices in a form that preserves the required information, remains readable and retrievable, and can be produced to the relevant tax authority.
Are digital invoices legally valid?
In the United Kingdom, European Union, and Spain, official rules recognize or permit electronic invoicing or storage subject to applicable requirements. For example, HMRC says an electronic invoice becomes the legal document for VAT purposes under its guidance, VAT Notice 700/63. The EU VAT framework also addresses storage of invoices by electronic means.
Electronic form alone does not settle whether a particular invoice meets the rules. The record must satisfy the requirements that apply to its jurisdiction and tax treatment. In Spain, the Tax Agency says electronic preservation is permitted when it guarantees authenticity of origin, integrity of content, legibility, and access by the agency without delay, subject to justified cause.
Can you delete paper invoices after scanning them?
Not on the basis of a general rule: the sources reviewed do not establish that scanning always lets you discard the paper original. The EU VAT Directive allows Member States to impose further requirements, including retention in the original form and preservation of data that guarantees authenticity and integrity. Spain permits electronic preservation if its stated safeguards are met, but that does not establish a universal scanning rule for other countries.
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Before discarding a paper invoice, check the current rule for the country and tax regime that govern the transaction, including whether that record category must be retained in its original form.
How long should you keep invoices?
There is no single worldwide deadline. The period can depend on the country, the tax year, the type of tax, and whether a special rule applies to the record.
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| Jurisdiction | Who and what the cited rule covers | Retention period or trigger | Format and access points |
|---|---|---|---|
| United States (federal tax) | Taxpayers’ machine-sensible records with contents that may be material to tax administration; records should support and verify return entries. | Keep them at least through the assessment limitation period for the tax year, including extensions. Some records, such as those connected with fixed assets, may need to be kept longer. The cited IRS material does not set one blanket invoice-specific number. | Keep sufficient transaction-level detail and an audit trail reconciling records with books and returns. See the IRS Automated Records page. |
| European Union (VAT framework) | Taxable persons must store copies of invoices issued and received. | Each Member State determines the retention period; the cited Directive provision sets no common number. | For electronically stored invoices with online access, relevant competent tax authorities have rights to access, download, and use them. Member States may impose additional requirements. See Council Directive 2006/112/EC. |
| United Kingdom (VAT) | VAT records required by HMRC, including electronic invoices where applicable. | The cited HMRC notice does not establish a single retention period for all invoices. | Records must be producible in readable form within a reasonable period and at a mutually agreed place. Cross-border rules can depend on the supplier’s country and, for some digital services to consumers in EU member states, the consumer’s member state. See HMRC VAT Notice 700/63. |
| Spain | Businesses and professionals must retain invoices and supporting documents related to tax obligations. | The Spanish Tax Agency states a four-year limitation period for relevant records, with exceptions. Certain invoices for purchases subject to an input-VAT adjustment period must be kept through that adjustment period and the following four years; specified investment-gold invoices have a five-year period. | Paper or electronic preservation is allowed if authenticity of origin, integrity of content, legibility, and prompt Tax Agency access are ensured, subject to justified cause. See the Spanish Tax Agency guidance on retaining invoices. |
The four-year and five-year periods above are Spain-specific examples from the Tax Agency’s undated guidance page accessed in 2026. They should not be applied to other countries. In the EU, the Directive expressly leaves the invoice-retention period to each Member State.
What should a compliant digital invoice archive preserve?
Build an archive around the rules that apply to your records, rather than assuming that keeping a PDF is enough. The cited authorities point to these practical checks:
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- Identify the governing rules. Establish the country and tax regime for the transaction before choosing a deletion date.
- Keep the required records. Retain issued and received invoices, along with supporting records needed to substantiate their tax treatment.
- Preserve the record’s substance. Maintain required invoice information and safeguards for authenticity, integrity, and legibility. Keep the original electronic form when local rules require it.
- Make records retrievable. Organize files so you can locate and produce them within the authority’s applicable access and timing requirements.
- Keep the audit trail. Preserve enough transaction detail to connect invoices to accounting records and tax-return entries.
- Check for longer periods. Review special rules for fixed assets, input-tax adjustments, or other record categories before deleting anything.
How to choose a safe retention deadline
- Identify the country, tax regime, tax year, and invoice category.
- Check the current tax-authority guidance and any governing rule for the required period, its start point, and extensions.
- Confirm whether the original paper or electronic form must be kept and what integrity, readability, and access safeguards apply.
- Check whether the invoice supports an asset, adjustment, or other category with a longer retention requirement.
- Set a review date only after resolving those points; when the rule is unclear or material, consult a qualified tax professional before destroying the record.
The cited examples cover US federal tax, EU VAT, UK VAT guidance, and Spain; they are not a complete country-by-country guide or a determination for any particular taxpayer. A usable deadline requires matching the rule to the jurisdiction, tax type, transaction year, and invoice category.
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- Deeper Pockets & Unobstructed Tabs: In response to a common issue in accordion folders where papers cover index labels, we've increased pocket height by 0.8 inches (2 cm). This unique enhancement ensures your labels remain visible—a feature unmatched by competitors
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