Magbayad sa cashier ngayon.

It is most naturally understood as a command/instruction: Pay at the cashier now.

In Filipino, commands often:

• start with the verb
• leave out the subject you
• sound direct unless softened with polite words

So the full idea is something like You, pay at the cashier now.

A more explicit version would be:

• Magbayad ka sa cashier ngayon. — singular you
• Magbayad kayo sa cashier ngayon. — plural or polite you

Magbayad is built from the root bayad, which is related to payment / pay.

The prefix mag- is a very common verb-forming prefix in Filipino. Here, magbayad is the form used for:

• the actor-focused verb
• an infinitive-like form
• a command form

So in this sentence, magbayad means to pay / pay.

Very roughly:

• bayad = payment / pay
• magbayad = to pay / pay

Sa marks a location, destination, or target-like place/person in many sentences.

In sa cashier, the idea is:

• at the cashier
• to the cashier
• sometimes practically at the checkout/payment counter

So cashier here is not the main topic or subject. It is the place/person you go to in order to pay.

Compare:

• sa cashier = at/to the cashier
• ang cashier = the cashier as the topic/subject

In everyday usage, sa cashier is exactly what you would expect in a store or office instruction.

That is very normal in Filipino.

Filipino uses many English loanwords, especially for:

• jobs
• business terms
• office/store language
• modern everyday vocabulary

So words like cashier, counter, receipt, office, and manager are very common in natural speech.

A native speaker would not find sa cashier strange at all.

Ngayon means now.

It tells you when the action should happen.

Putting ngayon at the end is very natural in Filipino:

• Magbayad sa cashier ngayon.

But Filipino word order is fairly flexible, so you may also hear:

• Ngayon, magbayad sa cashier.

The original version sounds like a straightforward instruction with the time word added at the end for emphasis: do it now.

Yes. The subject you is omitted, and that is very common in commands.

English also does this:

• Sit down.
• Wait here.
• Pay now.

Filipino does the same:

• Magbayad sa cashier ngayon.

If you want to show the subject, you can add:

• ka for singular informal
• kayo for plural or polite

Examples:

• Magbayad ka sa cashier ngayon.
• Magbayad kayo sa cashier ngayon.

A polite version would usually add po and often kayo:

• Magbayad po kayo sa cashier ngayon.

This is much more polite and appropriate when speaking to:

• customers
• older people
• strangers
• people you want to address respectfully

A softer request can also be made with other patterns, but the most straightforward polite version of this sentence is:

• Magbayad po kayo sa cashier ngayon.

This is a very useful question because the two forms do not focus on the same thing.

• Magbayad focuses on the person doing the paying
• Bayaran is a different verb form, often focusing more on the thing/person being paid

So:

• Magbayad sa cashier = Pay at/to the cashier
• Bayaran mo ang cashier = Pay the cashier

In everyday store instructions, magbayad sa cashier sounds very natural because the idea is go do the act of paying at the cashier.

A simple learner-friendly pronunciation guide is:

mag-buh-YAD sa KASH-yer nga-YON

A few notes:

• magbayad has stress near the end: -yad
• cashier in Filipino speech is often pronounced close to KASH-yer
• ngayon is commonly pronounced roughly nga-YON

If you say it smoothly: mag-buh-YAD sa KASH-yer nga-YON

That will sound quite understandable.