El periodo de facturación termina hoy.

Because periodo is a masculine noun in Spanish, so it takes the masculine singular article el.

• el periodo = the period
• un periodo = a period

The ending -o often suggests a masculine noun, and in this case that pattern fits.

De facturación describes what kind of period it is: a billing period.

Spanish very often uses noun + de + noun where English might use an adjective or a noun used attributively.

So:

• periodo de facturación = billing period
• literally: period of billing

This structure is very common in Spanish:

• tarjeta de crédito = credit card
• centro de salud = health centre
• hora de salida = departure time

Because facturación is being used as a general category, not as a specific individual thing.

So periodo de facturación means billing period, not period of the billing.

If you added an article, it would usually sound more specific and would change the feel of the phrase:

• el periodo de facturación = the billing period
• el periodo de la facturación = the period of the billing/invoicing process

In this sentence, the version without the article is the natural one.

Termina is the present tense of terminar: it ends / it is ending.

In Spanish, the present tense is often used for:

• facts
• schedules
• near future events

So termina hoy is very natural and can mean:

• ends today
• is ending today

You could also say terminará hoy, which means will end today, but termina hoy often sounds more immediate and natural in everyday language.

It agrees with el periodo de facturación, which is a third-person singular subject.

That is why the verb is termina:

• yo termino
• tú terminas
• él/ella termina

Here, the subject is not a person, but Spanish still uses the same third-person singular form for things:

• El periodo termina hoy.

Because Spanish often uses the simple present where English may prefer either:

• ends today
• is ending today

So Spanish termina hoy can cover both ideas depending on context.

If you wanted to emphasise an action in progress, you could say:

• está terminando hoy

But that is less natural in this kind of administrative sentence. Termina hoy is the normal choice.

Yes, acaba hoy is possible and natural in many contexts.

• termina hoy = ends today
• acaba hoy = ends today / finishes today

However, termina often sounds slightly more neutral or formal, which fits well with a phrase like periodo de facturación.

So in an official, business, or website context, termina hoy is a very good choice.

Putting hoy at the end is the most neutral and natural word order here.

• El periodo de facturación termina hoy.

Spanish word order is flexible, so you could move hoy for emphasis:

• Hoy termina el periodo de facturación.

That version puts more focus on today.

So the original sentence is just the standard, unmarked order: subject + verb + time expression

In standard Peninsular Spanish, facturación is pronounced approximately:

fak-too-ra-THYON

More carefully:

• fac = fak
• tu = too
• ra = ra
• ción = thyon in most of Spain

The final stress falls on -ción, because of the written accent:

• fac-tu-ra-CIÓN

A key Spain-specific point:

• c before i or e is usually pronounced like English th in think
• so -ción sounds like -thyon in most of Spain

Because the stress falls on the last syllable: -ción.

Without getting too technical, Spanish uses written accents to show when the stress does not follow the default pattern. In facturación, the accent tells you to stress the last syllable:

• fac-tu-ra-CIÓN

This is very common with nouns ending in -ción:

• información
• dirección
• facturación

These are usually feminine nouns too, because of the -ción ending.

Yes. Both periodo and período exist, and both are accepted.

However, periodo is the more common standard spelling. That is why you often see:

• el periodo de facturación

For a learner, it is best to recognise both, but use periodo unless you have a specific reason not to.

Because Spanish usually omits subject pronouns when the verb form already makes the subject clear.

Here, termina already matches the subject el periodo de facturación, so no pronoun is needed.

In fact, adding a pronoun here would sound unnatural:

• El periodo de facturación termina hoy. ✓
• Él termina hoy. ✗ unless you are oddly referring to the period as it/he

Spanish normally just uses the noun itself or leaves the pronoun out.

Sometimes yes, depending on context.

A few possible English equivalents are:

• billing period
• billing cycle
• billing term

But billing period is the most direct match for periodo de facturación.

If this appears on a phone bill, subscription page, or bank website, the exact English wording may vary by company, even when the Spanish stays the same.

It is neutral to slightly formal, which is exactly what you would expect in administrative, financial, or customer-service language.

Words like:

• periodo
• facturación

make it sound more official than everyday speech.

In casual conversation, a person might say something simpler depending on context, but for websites, contracts, accounts, or billing notices, this sentence sounds completely natural.

You might hear forms with se in some contexts, but termina hoy is the cleaner and more standard option here.

• El periodo de facturación termina hoy. ✓
• El periodo de facturación se termina hoy. possible in some varieties/contexts, but less natural here

For formal written Spanish, especially in Spain, the version without se is the best choice.

The infinitive is terminar.

Here is the present tense:

• yo termino
• tú terminas
• él/ella/usted termina
• nosotros terminamos
• vosotros termináis
• ellos/ellas/ustedes terminan

Since el periodo de facturación is a singular third-person subject, the correct form is:

• termina

Yes, basically the same thing.

The difference is emphasis:

• El periodo de facturación termina hoy.
  Neutral, informational.

• Hoy termina el periodo de facturación.
  Emphasises today.

Both are correct. The original is simply the more neutral way to present the information.