Why can't I just say 払う for everything? It means "pay," right?
Rei
Technically you can survive with 払う, but you will sound unnatural in formal writing, business settings, and digital contexts. And 精算する has a completely different nuance — it's about calculating and squaring up a balance, not just handing over money.
## What Does 払う Mean? 払う（はらう）is the everyday, go-to verb for paying. It is the first payment word most learners encounter, and it belongs to the same register as casual spoken Japanese. You pay for your coffee, your train ticket, your share of lunch — 払う covers all of it without sounding stiff. **Pattern**: [amount / item] + を + 払う **Example sentences**: コンビニでお金を払いました。
*I paid at the convenience store.* ランチ代を払ってくれてありがとう。
*Thanks for paying for lunch.* 家賃（やちん）を毎月払っています。
*I pay rent every month.* 税金（ぜいきん）を払わなければなりません。
*I have to pay taxes.* **Common compounds**:
– 払い戻し（はらいもどし）— refund
– 払い込み（はらいこみ）— payment into an account (bank transfer, utility bill)
– 前払い（まえばらい）— advance payment
– 後払い（あとばらい）— payment after the fact / deferred payment ## What Does 支払う Mean? 支払う（しはらう）carries the same core meaning as 払う, but it sounds more deliberate and official. You will see it on invoices, in contracts, in business emails, and in bank statements. Native speakers choose 支払う when the payment has weight to it — a utility bill, a medical fee, a supplier invoice. **Pattern**: [amount / item] + を + 支払う **Example sentences**: 月末までに料金（りょうきん）を支払ってください。
*Please make the payment by the end of the month.* 請求書（せいきゅうしょ）に記載された金額を支払いました。
*I paid the amount stated on the invoice.* 保険料（ほけんりょう）を毎月支払っています。
*I make my insurance premium payment every month.* 支払い期限（しはらいきげん）を確認してください。
*Please check the payment deadline.* **Key vocabulary built on 支払う**:
– 支払い方法（しはらいかた）— payment method (seen on most retail and service forms)
– 支払い期限（しはらいきげん）— payment deadline
– 支払い済み（しはらいずみ）— already paid / payment completed
– 未払い（みばらい）— unpaid / outstanding payment In a business email, you would write 「ご請求額をお支払いいただきますよう」rather than 「払ってください」. The register difference matters in professional contexts. ## What Does 決済する Mean? 決済する（けっさいする）is the language of transactions. It does not simply mean “to pay” — it means the moment a payment is processed and completed, particularly in digital or card-based contexts. You will encounter this word constantly in EC (e-commerce) checkout flows, payment app confirmations, and fintech settings. **Pattern**: [payment method] + で + 決済する / 決済が完了する **Example sentences**: クレジットカードで決済しました。
*I paid / completed the transaction by credit card.* 決済が完了しました。ありがとうございます。
*Payment has been completed. Thank you.* アプリ内でキャッシュレス決済ができます。
*You can make cashless payments within the app.* 決済エラー（けっさいエラー）が発生しました。もう一度お試しください。
*A payment error occurred. Please try again.* **Key vocabulary**:
– キャッシュレス決済 — cashless payment (contactless, QR, card)
– 決済方法（けっさいほう）— payment method (more formal/digital than 支払い方法)
– 決済完了（けっさいかんりょう）— payment completed
– 決済エラー — payment error
– 分割払い決済（ぶんかつばらいけっさい）— installment payment transaction **Critical warning — 決済 vs 決裁（けっさい）**: These two words are pronounced identically but written with different kanji and have completely different meanings. – 決済（けっさい）💳 — payment processing, completing a financial transaction
– 決裁（けっさい）✅ — managerial approval, authorization of a decision or expenditure Mixing up 決済 and 決裁 in a business email is a real mistake that Japanese office workers sometimes make too. If you write 「部長の決済が必要です」when you mean approval, you have told your manager that the department head needs to process a payment — not sign off on your proposal. Always double-check which kanji you are using. ## What Does 精算する Mean? 精算する（せいさんする）is about settling a calculated balance. Where 払う and 支払う mean transferring money, 精算する implies that someone has first itemized or calculated what is owed, and now the parties are squaring it up. It covers three main scenarios: company expense claims, train fare adjustments, and settling costs among a group. **Pattern**: [expenses / costs] + を + 精算する **Example sentences**: 出張（しゅっちょう）の経費（けいひ）を精算してください。
*Please settle your business trip expenses.* 交通費（こうつうひ）を精算するために領収書（りょうしゅうしょ）が必要です。
*You need a receipt to claim your travel expenses.* 駅の精算機（せいさんき）で不足分（ふそくぶん）を払ってください。
*Please pay the shortfall at the fare adjustment machine at the station.* 飲み会（のみかい）の費用（ひよう）をあとで精算しましょう。
*Let's settle the costs from the drinking party later.* **Key vocabulary**:
– 経費精算（けいひせいさん）— expense reimbursement / expense settlement (workplace)
– 交通費精算（こうつうひせいさん）— travel expense settlement
– 精算機（せいさんき）— fare adjustment machine at train stations
– 立替金（たてかえきん）— money you paid on someone else's behalf, to be reimbursed
– 領収書を添付する（りょうしゅうしょをてんぷする）— to attach a receipt (required for expense claims) If you take a taxi for work and pay out of pocket, you have paid a 立替金. When you submit the paperwork to get that money back, you are doing 経費精算.
Yuka
I was looking at an online shopping site and saw both 支払い方法 and 決済方法. Are they different?
Rei
They mean essentially the same thing — how you want to pay — but 決済方法 is used more in tech-oriented and digital payment contexts, while 支払い方法 is the broader, more common term you see on all kinds of forms and receipts. On most EC sites you will see 支払い方法, while a fintech app or QR payment platform is more likely to use 決済方法.
## 払う vs 支払う: Casual Pay vs Formal Payment Both verbs describe the act of paying. The difference is entirely register. | Situation | 払う | 支払う |
|———–|——|——–|
| Telling a friend you paid for coffee | ✅ Natural | ⚠ A little stiff |
| A company invoice or bill notice | ⚠ Too casual | ✅ Natural |
| Spoken conversation about bills | ✅ Fine | ✅ Also fine |
| Business email to a client | ⚠ Too casual | ✅ Expected |
| Asking a roommate to pay their share | ✅ Natural | ⚠ Overly formal | **Common mistake**: English speakers sometimes use 支払う for everything because it sounds “more correct.” But 支払う in casual speech — for example, saying 「コーヒー代を支払った」to a friend — sounds unnatural and unnecessarily formal. Everyday spoken Japanese prefers 払う. Both verbs take the same grammatical structure: – お金を払う / お金を支払う
– 費用を払う / 費用を支払う The only difference is tone. Think of 払う as “pay” in casual English and 支払う as “make a payment” or “remit payment” in a document. ## 支払う vs 決済する: Transferring Money vs Completing a Transaction 支払う describes the act of transferring or handing over money. 決済する describes the moment a transaction is processed and finalized — particularly in digital or card-based systems. A useful way to feel the difference: – 「料金を支払う必要があります」— You need to make a payment. *(telling someone what to do)*
– 「決済が完了しました」— The payment has been processed. *(system notification after a transaction is done)* You would not say 「コンビニのレジで決済した」in casual conversation — it sounds overly technical for a store transaction. However, on an app screen or EC checkout confirmation, 「決済が完了しました」is completely standard. **Additional contrast**: | Phrase | Natural? | Context |
|——–|———-|———|
| 月額料金を支払ってください | ✅ | Subscription billing notice |
| クレジットカードで決済する | ✅ | EC checkout, card terminal |
| 決済する at a small local restaurant | ❌ | Too technical; use 払う or お会計 |
| 支払いが完了しました | ✅ | General “payment completed” |
| 決済が完了しました | ✅ | Digital/card transaction confirmation | ## 支払う vs 精算する: Paying vs Settling Up 支払う is about the act of paying an amount owed. 精算する is about calculating what is owed and then clearing it — the “settling up” that follows itemization. In a workplace context, when employees spend money on behalf of the company, they 立て替える（たてかえる）the cost. Later, they 経費を精算する — submit the figures, attach receipts, and recoup the money. The company does not simply 支払う back to the employee; it runs a formal 経費精算 process. At train stations, if you get on with insufficient credit on your IC card or bought a ticket for the wrong distance, you go to the 精算機 at the exit and pay the difference. You are not “paying for the train ride” at that point — you are adjusting and settling the balance. **Business 精算 workflow**:
1. 立替金を出す — pay out of pocket on behalf of the company
2. 領収書を受け取る — receive a receipt
3. 経費精算書（けいひせいさんしょ）を作成する — fill out an expense reimbursement form
4. 領収書を添付する — attach the receipt
5. 上司（じょうし）に承認（しょうにん）してもらう — get manager approval
6. 振り込まれる（ふりこまれる）— receive the reimbursement by bank transfer ## 割り勘 and 精算: Splitting the Bill When dining out or drinking with a group, two related concepts come up: 割り勘（わりかん）and 精算（せいさん）. **割り勘（わりかん）** means splitting the total bill equally among everyone present. Each person pays the same amount regardless of what they ordered. 「今日は割り勘にしましょう。」
*Let's split the bill equally today.* 「割り勘で1人3,000円です。」
*Splitting equally, it's 3,000 yen per person.* **精算する** at a restaurant or after a drinking party means calculating and settling each person's actual share, which may not be equal. It implies working out the numbers carefully. 「飲み会が終わったら、みんなで精算しよう。」
*Once the party is over, let's all settle up.* 「注文した分だけ精算しましょう。割り勘じゃなくて。」
*Let's settle based on what each person ordered, not split equally.* The key distinction: 割り勘 = divide equally; 精算 = calculate and settle (each person's actual amount, or the whole balance). You often 精算する after doing the 割り勘 math. **Useful restaurant vocabulary**:
– お会計（おかいけい）— the bill (what you ask for at a restaurant: 「お会計をお願いします」)
– 別々に払う（べつべつにはらう）— to pay separately
– まとめて払う（まとめてはらう）— to pay together / all at once
– 割り勘にする — to go dutch / split equally
Yuka
How do I ask to split the bill at a restaurant in Japanese?
Rei
The easiest way is to tell the staff when asking for the bill: 「お会計をお願いします。割り勘でお願いできますか？」(Could we split the bill equally?) Or if you want to pay separately: 「別々でお願いします。」Most restaurants in Japan will handle this without any problem.
## Common Mistakes English Speakers Make **1. Using 払う for everything**
払う works in casual speech, but using it in a business email or on a formal invoice sounds sloppy. When writing to a client or vendor, switch to 支払う: 「〇月〇日までにお支払いください」. **2. Saying 経費を支払う when 精算する is expected**
In a workplace context, 「経費を支払う」sounds odd because you are not literally paying expenses — you are submitting them for reimbursement. The correct expression is 「経費を精算する」. This is a common mistake even among learners who are otherwise comfortable with 支払う. **3. Using 決済する at a casual restaurant or small shop**
「ここで決済できますか？」at a neighborhood izakaya sounds bizarrely technical. In casual settings, use 払う or simply ask for お会計. Reserve 決済する for digital payments, EC platforms, and card terminals. **4. Confusing 決済（payment）and 決裁（approval）**
Same reading, different kanji, completely different meaning. In a business email, 「社長の決済が必要です」means “the president needs to process a payment,” not “we need the president's approval.” If you mean managerial sign-off, write 決裁（けっさい）with 裁（さばく / さい）. **5. Confusing 割り勘 and 精算**
Saying 「割り勘で精算しよう」is slightly redundant — 割り勘 already implies equal division. If you want to settle by actual amounts ordered, say 「精算しよう」alone and skip the 割り勘. If you mean equal split, 「割り勘にしよう」is cleaner. ## Decision Rule: Which Payment Word Should You Use? “`
Are you in a casual, everyday situation (convenience store, lunch with friends)?
→ 払う Are you writing a bill notice, invoice, or formal document?
→ 支払う Are you describing a digital transaction being processed (EC checkout, card payment, app)?
→ 決済する Are you calculating and squaring up expenses, reimbursements, or a group bill?
→ 精算する Is someone asking for approval from a manager?
→ NOT 決済 — use 決裁 (different kanji!) Are you splitting a restaurant bill equally among the group?
→ 割り勘 (then 精算 to actually settle the amounts)
“` ## Quick Quiz Test yourself. Choose the most natural word for each situation. **1.** You are at a ramen shop and want to ask for the bill. What do you say? a) 決済をお願いします b) お会計をお願いします c) 精算をお願いします **2.** You filled in your company’s expense form after a business trip. Which verb describes what you did? a) 払った b) 支払った c) 精算した **3.** You received an email from your internet provider: 「今月分の利用料金を＿＿＿ください。」 Which verb fits? a) 払って b) お支払い c) 決済して **4.** The EC site shows: 「クレジットカードで＿＿＿が完了しました。」 Which noun fits? a) 支払い b) 決済 c) 精算 **5.** After dinner your friend says: 「みんなで＿＿＿しよう。一人いくら？」 Which word fits? a) 決済 b) 払い c) 割り勘 **Answers**: 1-b, 2-c, 3-b, 4-b, 5-c If you have questions about any of these scenarios or want to share how payment situations work in your country, leave a comment below — it is always interesting to see how other languages handle the concept of “paying”! ## Keep Learning
Yuka
Rei
Yuka
Yuka
