Receiving and Paying in Dollars: Calculate Your Net FX Exposure

Receiving and paying in dollars raises a specific question for treasury teams: how much should you convert to pesos if some of those funds will be needed for foreign suppliers? The answer starts with separating available funds, dollar obligations, and essential local-currency expenses. The total received is not the same as the amount available to convert.

Trade activity makes this review relevant. According to La Jornada's October 28, 2026 article, Mexican exports in September grew 37.9% year over year, while imports rose 33.1%. However, exports declined 2.45% month over month on a seasonally adjusted basis: growth is not uniform, nor does it necessarily reflect each company's situation.

For a company that exports and imports, the useful next step is to move from reviewing a single invoice to looking at all transactions together. This calculation helps coordinate liquidity; it does not, on its own, demonstrate savings or predict exchange rates.

1. What your net FX exposure means

Net FX exposure is the balance remaining after offsetting positions in the same currency. For an operational treasury review, you can start with this formula for each cutoff date:

Net USD cash flow position = available opening balance + receipts available for use by the cutoff date − committed payments due by the cutoff date.

• Positive result: dollars remain after covering the payments included, but you still need to review reserves and peso needs.
• Negative result: there are not enough dollars to meet those obligations.
• Result close to zero: inflows and outflows offset each other in amount, though their timing may not align.

This calculation does not replace a comprehensive accounting measure of FX exposure, which may include accounts receivable, debt, and other assets or liabilities. An outstanding invoice represents exposure, but not cash available to make a payment today.

This approach expands on the exercise of budgeting for a dollar-denominated invoice: the focus now is on the balance that remains exposed after accounting for other transactions.

2. Separate three categories before converting

Available dollars and expected receipts

Distinguish your usable balance from pending receipts. For each inflow, record the amount, receiving account, and date when the funds will be available for use. Do not treat a promise to pay as cash or count a receipt again if it is already included in the bank balance.

Committed dollar payments

Include invoices, advance payments, freight, and other USD-denominated obligations. Note when the beneficiary must receive the money and when you need it available to initiate the transaction, allowing for cutoff times and possible reviews.

Separate approved commitments from purchases that are still tentative. Both can affect planning, but they do not carry the same level of certainty.

Essential peso expenses

Group payroll, rent, utilities, and other outflows that must be covered in MXN. Then subtract usable pesos and peso receipts that will be available before the due date.

MXN shortfall = essential expenses + desired operating reserve − available pesos − usable MXN receipts.

If the result is negative, treat the conversion need for those expenses as zero. Keep reserves visible: do not confuse them with payments already committed.

3. Example: receiving and paying in dollars without converting everything

All amounts below are illustrative; they do not represent a Nuvex quote. A company receives USD 80,000 from exports and must pay USD 60,000 to suppliers. The funds are already available, and the timing allows the company to meet those obligations.

Item	Illustrative amount
Available receipt	USD 80,000
Committed payments	USD 60,000
Net cash flow position	USD 20,000
Operating reserve set by the company	USD 2,000
Preliminary balance available to convert, before costs	USD 18,000

The company also has essential expenses of MXN 180,000 and has MXN 30,000 available. Its shortfall is MXN 150,000, without adding another peso reserve in this example.

This raises two separate questions:

1. How many dollars could it convert? Up to USD 18,000 before deducting additional costs that must be paid in dollars.
2. How many does it need to convert? Enough to receive a net amount of MXN 150,000, based on the applicable quote.

The second question cannot be answered using balances alone. If T is the quoted exchange rate, expressed in pesos per dollar, and F is a separate peso fee deducted from the conversion proceeds:

USD needed = (150,000 + F) / T.

Do not add a fee again if it is already included in the quoted net amount. If there are additional charges in USD, subtract them from the amount available to convert.

If the dollars needed exceed that amount, there is a shortfall that must be addressed. If fewer dollars are needed, converting the entire remaining balance is not necessary to cover those expenses. How the remaining funds are used will depend on upcoming obligations and treasury policy.

4. Template for calculating by cutoff date

Copy this structure into a spreadsheet. Use one column for each relevant date and record cumulative transactions from the same starting point.

Row	Item	Calculation or entry
A	Usable opening USD balance	Enter without double-counting receipts
B	Additional receipts available for use by the cutoff date	Enter by date
C	Committed USD payments due by the cutoff date	Enter by obligation
D	Net USD cash flow position	A + B − C
E	USD operating reserve	Enter according to internal policy
F	Additional costs payable in USD	Enter from the quote
G	USD available to convert	Greater of zero and D − E − F
H	Essential expenses and reserve in MXN	Enter amount
I	Available pesos and usable receipts	Enter amount
J	MXN shortfall	Greater of zero and H − I
K	USD needed to cover J on a net basis	Obtain from the quote
L	Difference between available and required USD	G − K

A negative result in L indicates insufficient funds to cover both the peso shortfall and the planned reserves. Keep D visible as well: setting a floor of zero for G must not hide a dollar deficit.

Add supporting columns for status, availability date, and person responsible. Maintain one version with available funds and another with projections; do not confuse their results.

5. Timing can change the answer

A positive monthly balance can hide an interim shortfall. In a variation of the example, if the USD 60,000 must be paid before the USD 80,000 is received and there is no opening balance, the future remainder of USD 20,000 does not cover the immediate payment due.

Recalculate the position before each major outflow. Verify both the availability of incoming funds and the estimated processing time to deliver the payment; neither should be taken for granted.

Also check that the funds can be used for that obligation. Restricted funds or money belonging to another entity in the group should not automatically be used to offset it.

An international payment calendar helps organize due dates. The additional step here is calculating how much money remains available at each cutoff date and how much must be set aside for peso operating expenses.

6. Compare scenarios with all costs included

Converting every receipt to pesos and then buying dollars for suppliers may involve two currency conversions. Allocating part of a receipt to USD obligations reduces the amount that needs to be converted, but does not guarantee savings.

Compare both scenarios using the same due dates and obligations:

• Total dollars sold and purchased.
• Net pesos received or paid out.
• Applicable conversion fees and sending or receiving charges.
• Actual availability of funds.
• Ending balance in both currencies.

To evaluate currency exchange for businesses, ask for the applicable exchange rate, fee, and net amount. Avoid comparing an all-in quote with a reference rate that excludes charges. If a conversion will take place later, its future cost remains uncertain.

You can review Nuvex's collection, international payment, and currency exchange services. Consult your accountant about recording and reconciling transactions; this template is an operational tool, not personalized tax or accounting advice.

7. Conclusion: convert based on your obligations

Receiving and paying in dollars requires distinguishing between funds received, committed funds, and funds actually available to convert. Calculate your net position by date, identify the peso shortfall, and request a quote to cover it without neglecting USD payments.

To review your transactions as a whole, speak with a Nuvex advisor. Bring details of your available receipts, committed payments, and peso expenses: they will be the starting point for evaluating collection, international payment, and conversion options.