Best mobile for self-employed 2026 — e-invoicing from $5/mo

If you work as a self-employed professional in Spain, you need a complete electronic invoice to deduct 100% of the VAT on your mobile service. Most traditional carriers charge $25–45/mo for lines with invoicing, but eSIM can reduce the cost to $5–15/mo with the same tax validity. At eSIM Ahora we issue invoices with your business name, tax ID, and VAT breakdown — all the elements Spain's tax authority requires for expense deduction in your quarterly tax filing.

Why self-employed professionals need electronic invoices

Spain's tax authority allows you to deduct 100% of VAT on professional telecommunications if you meet two requirements: the service must be used exclusively for business (or if mixed-use, you must justify it in your expense log), and you must have a complete invoice with the account holder's information. A simplified invoice — the kind many prepaid reload apps issue — does not qualify for VAT deduction because it does not list the client or include their tax ID.

Traditional carriers (Movistar, Vodafone, Orange, Yoigo, MásMóvil) issue electronic invoices automatically, but their self-employed plans start at $25/mo for 20–30 GB. If you work from home or from WiFi-covered spaces and only use data while traveling occasionally, you pay for data you do not consume. The alternative is a prepaid plan with invoicing — this is where eSIM comes in.

At eSIM Ahora we sell data packages (3 GB, 5 GB, 10 GB) valid for 30 days and issue an electronic invoice for each purchase. Pricing ranges from $5–15 depending on the package; when you renew each month you pay only for what you need. The invoice includes your full business name, tax ID, billing address, and VAT breakdown at 21% — the same fields as a Movistar or Vodafone invoice. The difference is in the model: prepaid per package instead of monthly subscription.

What must appear on the invoice to be tax-deductible

Spain's tax authority requires these fields on the invoice to approve VAT deduction:

• Issuer business name and tax ID (these appear in the invoice you receive by email).
• Client business name (your trading name or full name if you invoice as an individual) and your tax ID.
• Billing address (the one registered with the tax authority).
• Taxable base, VAT rate (21% for telecommunications in Spain), and VAT amount listed separately.
• Issue date and unique invoice number.
• Service description (for example, "5 GB data package — eSIM Spain — 30 days").

When you purchase a plan from eSIM Ahora, we request this information in the checkout form. The invoice is generated automatically and arrives at your email in PDF within 10 minutes. You can download it as many times as needed — it does not expire. If you need to correct any data (for example, if you entered the tax ID incorrectly), you request a corrective invoice by email and we issue it within 24–48 hours.

Traditional carriers also meet these requirements, but their enrollment process is slower: Movistar and Vodafone take 2–3 business days to activate a self-employed line and validate tax information. With eSIM the QR code generates instantly and the invoice arrives before you finish activating the profile on your phone.

Mobile plan comparison for self-employed 2026

This table compares the monthly cost of lines with valid electronic invoices for VAT deduction, assuming moderate usage (5–10 GB/mo, occasional calls, work mostly on WiFi):

eSIM Ahora pricing is a range because it varies by country (a 5 GB package for Spain costs less than the same package for Japan). For Spain specifically, the cost is $8 for 5 GB or $14 for 10 GB — see current plans for Spain.

The advantage of traditional carriers is they include voice calling. If you make professional calls daily (customer service, vendor contact), unlimited voice and a postpaid line make more sense. The advantage of eSIM is it eliminates fixed costs: if in any month you work from a client's office using their WiFi, you do not renew the package and save $8–14. Over a year with 3 low-usage months, cumulative savings are $24–42.

How to activate eSIM on your business phone

To use eSIM you need a compatible phone. Models that work with eSIM in Spain include:

• iPhone: XR, XS, XS Max, 11, 11 Pro, SE (2nd gen), 12, 13, 14, 15, 16 (all).
• Samsung Galaxy: S20 FE, S21/S22/S23/S24 (all), Z Flip/Fold (2020 onward).
• Google Pixel: 3a, 4/4a, 5/5a, 6/6a, 7/7a, 8/8a, 9.
• Xiaomi: 12T Pro, 13/13 Pro/13T Pro, 14.
• Oppo: Find X3 Pro, Find X5/X5 Pro, Reno 6 Pro 5G.

If you have an iPhone earlier than XR or a Samsung earlier than S20, it does not support eSIM — you need a physical SIM card. The full list of compatible models is on each manufacturer's website (Apple, Samsung, Google publish official tables).

The activation process takes less than 2 minutes:

1. Purchase the plan on the eSIM Ahora website, fill in your tax information (business name, tax ID, address), and pay by card.
2. Receive the QR code by email (arrives in 30–60 seconds). The email also includes the invoice as a PDF attachment.
3. Scan the QR code from Settings > Mobile Data > Add Mobile Plan (iPhone) or Settings > Connections > SIM Card Manager > Add Mobile Plan (Android).
4. Activate the profile and give it a name (for example, "eSIM Work"). If you have another physical SIM, configure which one you use for data and which for calls.
5. Connect — the eSIM registers on Movistar's network (if you purchased the Spain plan) or the local network in the country you selected. Signal appears in 10–20 seconds.

If you use dual SIM (eSIM + physical SIM), you can keep your personal line on the physical SIM and your professional data line on the eSIM. This lets you separate expenses without carrying two phones. On iPhone you configure which line you use by default for mobile data in Settings > Mobile Data > Mobile Data, and for calls in Settings > Phone > Line for Calls.

The eSIM does not expire as long as you have balance — unlike traditional prepaid SIMs, which deactivate after 6 months without recharges. If you do not renew the package in any month, the eSIM profile stays installed on your phone; when you purchase another package using the same email, it recharges automatically (you do not need to scan a new QR each time).

VAT deduction and expense accounting

When you pay $14 for a 10 GB package, the invoice breaks down $11.57 in taxable base plus $2.43 in VAT (21%). In your quarterly tax filing (form 303) you enter that $2.43 in the "deductible VAT paid" field and subtract that amount from the VAT you owe the tax authority. If your activity is VAT-exempt (for example, educational or healthcare services), you cannot deduct the VAT paid, but the expense is still deductible as a normal business expense on your annual return.

In your accounting, record the expense in account 629 (Other services) or subaccount 6291 (Telecommunications services) if you follow the General Accounting Plan. An eSIM Ahora invoice is a valid receipt for tax inspection — it has the same evidentiary value as a Movistar invoice.

If you use the phone for mixed business and personal use, Spain's tax authority allows you to deduct the percentage corresponding to business use. For example, if you estimate 70% of data consumption is work-related (email, CRM, client video calls) and 30% is personal (social media, streaming outside work hours), you deduct 70% of the VAT. Keep a record in your expense log justifying your method — for example, "business phone, estimated 70% professional use based on connection hours during business hours". There is no official formula; the tax authority accepts reasonable methods if documented.

For self-employed using simplified accounting (módulos), the phone does not generate additional deduction because expenses are already estimated in the módulos tables. The above applies only if you use direct accounting (normal or simplified).

Which carrier makes sense by professional profile

The choice depends on how much you travel and whether you need voice:

• If you work from home/fixed office with stable WiFi: prepaid eSIM by package. You use data only on occasional trips (meetings, business travel). Annual cost range: $96–180 (renewing each month). Full invoice, no contract, you pay only the months you need mobile coverage.
• If you make professional calls daily: postpaid line with unlimited voice (Movistar, Vodafone, Orange). Fixed costs justify themselves because you use voice service several hours daily. Annual cost range: $300–420.
• If you travel abroad frequently: international eSIM. Traditional carriers charge $6–15/day for roaming outside the EU; with eSIM you buy local packages in your destination country. For example, 5 GB in Mexico costs $8–12 with eSIM Ahora versus $60–90 roaming with Movistar (10 days at $6/day). See plans for Mexico, Japan, USA, Turkey, Morocco.
• If you need a Spanish fixed number for invoicing: some self-employed need a phone number on business invoices (architects, lawyers, consultants). eSIM provides data only; for voice you need a traditional postpaid line or a VoIP service like Zadarma or Aircall that gives you a virtual number and charges per minute.

Corrective invoices and tax changes

If you make a mistake in the tax ID or business name when purchasing, request a corrective invoice by email to support@esimahora.com (response time: under 4 hours during business hours, under 24 hours on weekends). The corrective invoice voids the original and issues a new one with corrected data, keeping the same invoice series and operation date. No additional cost.

If you change your business structure mid-year (for example, from individual self-employed to a corporation), your earlier invoices remain valid with your individual tax information. From the change onward, you enter your new tax ID and business name on subsequent purchases. You do not need to correct old invoices — the tax authority allows the same taxpayer to have invoices under different structures if the change is documented.

To cancel the service, simply stop renewing the package. The eSIM deactivates automatically when GB is exhausted or when the 30-day validity ends (whichever comes first). No cancellation penalty or notice required — the prepaid model has no contract.

FAQ

Does an eSIM invoice qualify for 100% VAT deduction?

Yes, provided the invoice includes your business name, tax ID, billing address, VAT breakdown, and service description. An invoice with these fields has the same tax validity as a traditional carrier invoice. The difference between prepaid and postpaid does not affect deductibility — what matters is that the invoice meets the requirements of Spain's invoicing regulation.

How long does the electronic invoice take to arrive?

The invoice is generated automatically when payment is complete and arrives by email in PDF format within 5–10 minutes. If you do not receive it, check your spam or junk folder. You can download it from your account as many times as needed — it does not expire and the download link has no usage limit.

Can I use the same eSIM on multiple business phones?

No. Each profile is tied to the unique identifier (EID) of the phone where you install it. If you have two employees who need a data line, you purchase two packages separately — each person scans their own QR and receives their own invoice. You cannot share one profile across devices because the EID is unique per device (equivalent to the IMEI of physical SIMs).

What happens if I use all the GB before 30 days?

The service deactivates automatically. You can purchase another package anytime — the new package adds as a top-up to your existing profile and you do not need to scan a new QR. The top-up invoice is issued separately with its own number. If you prefer to wait for the 30-day period to expire before renewing, you can; there is no penalty for early use or reactivation cost.

Are traditional carriers better for self-employed than eSIM?

It depends on your usage. For frequent professional calling (over 1 hour daily), a postpaid line with unlimited calls is more practical. For occasional data (work from WiFi with sporadic travel), the prepaid option eliminates fixed monthly costs. Some self-employed combine both: a fixed VoIP line for office calls plus eSIM for data while traveling. Annual savings can be $150–250 compared to maintaining a traditional postpaid line at $30–40/mo with unused data.