To find a mutual fund’s value by date, look up the fund’s historical net asset value (NAV) on the fund company’s own website using the ticker symbol and the date you need. Vanguard, Fidelity, Schwab, and the other major providers all publish daily historical price tables, and the figure they show is the same one your broker used to fill any order that settled that day. That number is what you’ll need when you’re calculating a capital gain, verifying a cost basis, or valuing inherited shares.
Where to Look Up a Past NAV
Start with the fund company. On most provider sites the page is labeled “Pricing” or “Historical Prices.” Enter the fund’s ticker, pick a date or date range, and the table returns the official closing NAV. Because this is the same price the fund used to process every buy and sell that day, it’s the figure that matches your brokerage records.
Yahoo Finance and Morningstar publish historical NAVs for most open-end mutual funds and are handy for quick lookups or side-by-side comparisons. One caution: these platforms often default to showing an adjusted price, which back-modifies historical NAVs for distributions and splits so a performance chart reads cleanly. Adjusted prices are not your cost basis. When you need the real price that changed hands on a specific day, switch the view to unadjusted or “actual” NAV.
The SEC’s EDGAR database holds mutual fund regulatory filings, including audited annual and semi-annual reports. EDGAR can confirm a NAV or a fund’s holdings at a reporting date, but it isn’t built for daily price lookups. Treat it as a backup when a figure is missing or in dispute.
What NAV Is and When It’s Set
A mutual fund’s NAV is calculated once per business day, after U.S. stock markets close at 4:00 PM Eastern Time. The fund administrator adds up the market value of everything the fund owns, subtracts liabilities like accrued management fees, and divides by shares outstanding. Every order placed during the trading day settles at that single closing price, regardless of when it was submitted. The SEC requires this under its forward pricing rule.1eCFR. 17 CFR 270.22c-1 – Pricing of Redeemable Securities
So when you look up a historical price, there is exactly one number per fund per date. If you find two different figures, one of them is almost certainly an adjusted price.
When the NAV Isn’t What You Paid
If you bought a fund with a front-end sales load, the historical NAV understates what you actually paid per share. A fund with a 4% front-end load had a public offering price higher than its NAV, and the sales charge is part of your cost basis because it was part of the money you spent to acquire the shares. Use the original purchase confirmation or brokerage statement to verify the actual price, including any load. NAV alone is right for no-load funds and for confirming distribution or valuation dates, but it is not automatically your basis.
Using a Historical NAV as Your Cost Basis
Cost basis is the price you originally paid for shares. Subtract it from your sale proceeds and the result is either a capital gain the IRS taxes or a loss you can use to offset other gains.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses Your broker reports both proceeds and basis on Form 1099-B.3Internal Revenue Service. About Form 1099-B, Proceeds From Broker and Barter Exchange Transactions
For mutual fund shares acquired after 2011, brokers are required to track cost basis and report it to the IRS. For shares purchased before then, the burden falls on you. That’s the situation where historical NAV lookups do the real work: you need to reconstruct what you paid on a date years or decades in the past.
If you’re deciding which lots to sell to manage your tax outcome, the IRS recognizes specific share identification, first-in first-out, and average cost.4Internal Revenue Service. Publication 550 – Investment Income and Expenses Once you’ve used average cost on a particular fund, you generally can’t go back and redo prior sales under a different method.5Internal Revenue Service. Mutual Funds (Costs, Distributions, etc.)
Reinvested Distributions Create New Lots
Every time a fund pays a distribution, its NAV drops by the per-share distribution amount on the ex-dividend date. If the NAV was $50.00 and the fund declared $0.50, the NAV becomes $49.50. Nothing was lost — you still hold $50.00 in value, now split between shares worth $49.50 and $0.50 in cash or newly purchased shares.
If you reinvest, that $0.50 buys additional shares at the reduced NAV, and each reinvestment becomes a separate purchase lot with its own basis and holding period. You already owe tax on the distribution in the year it’s paid, whether you took the cash or reinvested it. Adding the reinvested amount to your basis is what keeps you from paying tax on the same dollars twice when you eventually sell. Over years of quarterly or annual distributions, one fund position can accumulate dozens of lots, and each of those lots ties back to a specific NAV on a specific date.
Inherited Shares Use the Date of Death
For inherited mutual fund shares, the NAV that matters is the price on the decedent’s date of death, not what the original owner paid. Federal law resets the basis of inherited property to its fair market value on that date.6Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired From a Decedent Shares bought long ago at $20 and worth $45 on the date of death carry a $45 basis in your hands; the prior appreciation is erased for tax purposes.
The executor can elect an alternate valuation date six months after death if it reduces the overall estate value.7Office of the Law Revision Counsel. 26 USC 2032 – Alternate Valuation Check with the executor or the estate tax return before you pull an NAV, because the wrong date will give you the wrong basis.
Gifted Shares Carry the Donor’s Basis
Shares received as a gift usually keep the donor’s original cost basis and holding period. If the donor paid $7,000 for shares now worth $12,000, your basis is $7,000. There’s one wrinkle: if the shares were worth less than what the donor paid on the date of the gift, and you later sell at a loss, you use the fair market value on the gift date instead.8Office of the Law Revision Counsel. 26 USC 1015 – Basis of Property Acquired by Gifts and Transfers in Trust For gifts, then, you may end up looking up two historical NAVs: the donor’s original purchase date and the gift date itself.
Watch the Wash Sale Rule When Harvesting Losses
If you’re pulling historical NAVs to identify losing lots you want to sell for a tax deduction, the wash sale rule can wipe out the loss. Sell mutual fund shares at a loss and buy the same fund, or a substantially identical one, within 30 days before or after the sale, and the IRS disallows the loss.9Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities The disallowed amount is added to the replacement shares’ basis, so it isn’t gone permanently, but you don’t get the deduction now.
The full window is 61 days: 30 before, the sale date, and 30 after. It reaches across all your accounts, including IRAs and your spouse’s accounts, and it crosses calendar years. A December sale followed by a January repurchase still triggers it. If you want to stay in a similar market segment during the waiting period, a different fund tracking a different index is the usual workaround.
Reporting the Sale
Mutual fund sales are reported on Form 8949, which flows into Schedule D.10Internal Revenue Service. Instructions for Form 8949 Form 8949 is where you reconcile your figures with what the broker reported on the 1099-B. This is where the historical NAV research does its final job: each lot needs an accurate acquisition date, cost basis, sale date, and proceeds. If your broker’s basis is already right and no adjustments are needed, summary totals can go straight on Schedule D. If you had to reconstruct basis from historical NAVs — old lots, missed reinvestments, an inherited or gifted position — Form 8949 is where the corrected numbers land.